Sugarcane Bacilliform MO Virus
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Sugarcane or sugar cane is a species of (often hybrid) tall, perennial grass (in the genus '' Saccharum'', tribe Andropogoneae) that is used for sugar production. The plants are 2–6 m (6–20 ft) tall with stout, jointed, fibrous stalks that are rich in
sucrose Sucrose, a disaccharide, is a sugar composed of glucose and fructose subunits. It is produced naturally in plants and is the main constituent of white sugar. It has the molecular formula . For human consumption, sucrose is extracted and refined ...
, which accumulates in the stalk internodes. Sugarcanes belong to the grass family,
Poaceae Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...
, an economically important flowering plant family that includes maize, wheat, rice, and
sorghum ''Sorghum'' () is a genus of about 25 species of flowering plants in the grass family (Poaceae). Some of these species are grown as cereals for human consumption and some in pastures for animals. One species is grown for grain, while many othe ...
, and many forage crops. It is native to the warm temperate and tropical regions of India, Southeast Asia, and New Guinea. The plant is also grown for biofuel production, especially in Brazil, as the canes can be used directly to produce ethyl alcohol ( ethanol). Grown in tropical and subtropical regions, sugarcane is the world's largest crop by production quantity, totaling 1.9 billion tonnes in 2020, with Brazil accounting for 40% of the world total. Sugarcane accounts for 79% of sugar produced globally (most of the rest is made from
sugar beet A sugar beet is a plant whose root contains a high concentration of sucrose and which is grown commercially for sugar production. In plant breeding, it is known as the Altissima cultivar group of the common beet (''Beta vulgaris''). Together wi ...
s). About 70% of the sugar produced comes from '' Saccharum officinarum'' and its hybrids. All sugarcane species can
interbreed In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in ...
, and the major commercial cultivars are complex hybrids. Sucrose (table sugar) is extracted from sugarcane in specialized mill factories. It is consumed directly in confectionery, used to sweeten beverages, as a preservative in jams and conserves, as a decorative finish for cakes and pâtisserie, as a raw material in the food industry, or fermented to produce ethanol. Products derived from fermentation of sugar include falernum, rum, and cachaça. In some regions, people use sugarcane reeds to make pens, mats, screens, and thatch. The young, unexpanded flower head of '' Saccharum edule'' (''duruka'') is eaten raw, steamed, or toasted, and prepared in various ways in Southeast Asia, such as certain island communities of Indonesia as well as in Oceanic countries like
Fiji Fiji ( , ,; fj, Viti, ; Fiji Hindi: फ़िजी, ''Fijī''), officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists ...
. Sugarcane was an ancient crop of the
Austronesian Austronesian may refer to: *The Austronesian languages *The historical Austronesian peoples The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, M ...
and
Papuan people The indigenous peoples of West Papua in Indonesia and Papua New Guinea, commonly called Papuans, are Melanesians. There is genetic evidence for two major historical lineages in New Guinea and neighboring islands: a first wave from the Malay Arc ...
. It was introduced to Polynesia, Island Melanesia, and Madagascar in prehistoric times via Austronesian sailors. It was also introduced to southern China and India by Austronesian traders around 1200 to 1000 BC. The Persians and Greeks encountered the famous "reeds that produce honey without bees" in India between the sixth and fourth centuries BC. They adopted and then spread sugarcane agriculture. Merchants began to trade in sugar, which was considered a luxurious and expensive spice, from India. In the 18th century, sugarcane plantations began in the Caribbean, South American, Indian Ocean, and Pacific island nations. The need for sugar crop laborers became a major driver of large migrations, some people voluntarily accepting
indentured servitude Indentured servitude is a form of labor in which a person is contracted to work without salary for a specific number of years. The contract, called an "indenture", may be entered "voluntarily" for purported eventual compensation or debt repayment, ...
and others forcibly imported as
slaves Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...
.


Etymology

The term "sugarcane" combines the Sanskrit word, शर्करा (''śárkarā'', later سُكَّر ''sukkar'' from Arabic, and ''sucre'' from Middle French and Middle English) with "cane", a crop grown on plantations in the
Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...
''gana'', Hindi for ''cane''. This term was first used by Spanish settlers in the West Indies in the early 16th century.


Description

Sugarcane is a tropical, perennial grass that forms lateral shoots at the base to produce multiple stems, typically high and about in diameter. The stems grow into cane stalk, which when mature, constitutes around 75% of the entire plant. A mature stalk is typically composed of 11–16% fiber, 12–16% soluble sugars, 2–3% nonsugar carbohydrates, and 63–73% water. A sugarcane crop is sensitive to climate, soil type, irrigation, fertilizers, insects, disease control, varieties, and the harvest period. The average yield of cane stalk is per year, but this figure can vary between 30 and 180 tonnes per hectare depending on knowledge and crop management approach used in sugarcane cultivation. Sugarcane is a
cash crop A cash crop or profit crop is an Agriculture, agricultural crop which is grown to sell for profit. It is typically purchased by parties separate from a farm. The term is used to differentiate marketed crops from staple crop (or "subsistence crop") ...
, but it is also used as livestock fodder. Sugarcane genome is one of the most complex plant genomes known, mostly due to interspecific hybridization and polyploidization.


History

The two centers of domestication for sugarcane are one for '' Saccharum officinarum'' by Papuans in New Guinea and another for '' Saccharum sinense'' by Austronesians in Taiwan and southern China. Papuans and Austronesians originally primarily used sugarcane as food for domesticated pigs. The spread of both ''S. officinarum'' and ''S. sinense'' is closely linked to the migrations of the Austronesian peoples. '' Saccharum barberi'' was only cultivated in India after the introduction of ''S. officinarum''. ''S. officinarum'' was first domesticated in New Guinea and the islands east of the Wallace Line by Papuans, where it is the modern center of diversity. Beginning around 6,000 BP, several strains were
selectively bred Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant mal ...
from the native '' Saccharum robustum''. From New Guinea, it spread westwards to maritime Southeast Asia after contact with Austronesians, where it hybridized with '' Saccharum spontaneum''. The second domestication center is mainland southern China and Taiwan, where ''S. sinense'' was a primary cultigen of the Austronesian peoples. Words for sugarcane are reconstructed as '' *təbuS'' or ''*CebuS'' in Proto-Austronesian, which became ''*tebuh'' in Proto-Malayo-Polynesian. It was one of the original major crops of the Austronesian peoples from at least 5,500 BP. Introduction of the sweeter ''S. officinarum'' may have gradually replaced it throughout its cultivated range in maritime Southeast Asia. From Island Southeast Asia, ''S. officinarum'' was spread eastward into Polynesia and Micronesia by Austronesian voyagers as a canoe plant by around 3,500 BP. It was also spread westward and northward by around 3,000 BP to China and India by Austronesian traders, where it further hybridized with ''S. sinense'' and ''S. barberi''. From there, it spread further into western Eurasia and the Mediterranean. The earliest known production of crystalline sugar began in northern India. The earliest evidence of sugar production comes from ancient Sanskrit and Pali texts. Around the eighth century, Muslim and Arab traders introduced sugar from medieval India to the other parts of the Abbasid Caliphate in the Mediterranean, Mesopotamia, Egypt, North Africa, and Andalusia. By the 10th century, sources state that every village in Mesopotamia grew sugarcane.Watson, Andrew (1983). ''Agricultural innovation in the early Islamic world''. Cambridge University Press. pp. 26–27. It was among the early crops brought to the Americas by the Spanish, mainly Andalusians, from their fields in the
Canary Islands The Canary Islands (; es, Canarias, ), also known informally as the Canaries, are a Spanish autonomous community and archipelago in the Atlantic Ocean, in Macaronesia. At their closest point to the African mainland, they are west of Morocc ...
, and the Portuguese from their fields in the Madeira Islands. An article on sugarcane cultivation in Spain is included in Ibn al-'Awwam's 12th-century ''Book on Agriculture''. For thousands of years, cane was a heavy and unwieldy crop that had to be cut by hand and immediately ground to release the juice inside, lest it spoil within a day or two. Even before harvest time, rows had to be dug, stalks planted and plentiful wood chopped as fuel for boiling the liquid and reducing it to crystals and molasses. From the earliest traces of cane domestication on the Pacific island of New Guinea 10,000 years ago to its island-hopping advance to ancient India in 350 B.C., sugar was locally consumed and very labor-intensive. It remained little more than an exotic spice, medicinal glaze or sweetener for elite palates. In colonial times, sugar formed one side of the triangle trade of New World raw materials, along with European manufactured goods, and African
slaves Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...
. Christopher Columbus first brought sugarcane to the
Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...
during his second voyage to the Americas, initially to the island of
Hispaniola Hispaniola (, also ; es, La Española; Latin and french: Hispaniola; ht, Ispayola; tnq, Ayiti or Quisqueya) is an island in the Caribbean that is part of the Greater Antilles. Hispaniola is the most populous island in the West Indies, and th ...
(modern day
Haiti Haiti (; ht, Ayiti ; French: ), officially the Republic of Haiti (); ) and formerly known as Hayti, is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean Sea, east of Cuba and Jamaica, and ...
and the Dominican Republic). The first sugar harvest happened in
Hispaniola Hispaniola (, also ; es, La Española; Latin and french: Hispaniola; ht, Ispayola; tnq, Ayiti or Quisqueya) is an island in the Caribbean that is part of the Greater Antilles. Hispaniola is the most populous island in the West Indies, and th ...
in 1501; and many sugar mills had been constructed in Cuba and Jamaica by the 1520s. The Portuguese took sugar to Brazil. By 1540, there were 800 cane sugar mills in Santa Catarina Island and there were another 2,000 on the north coast of Brazil,
Demarara Demerara ( nl, Demerary, ) is a historical region in the Guianas, on the north coast of South America, now part of the country of Guyana. It was a colony of the Dutch West India Company between 1745 and 1792 and a colony of the Dutch state fro ...
, and
Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...
. Sugar, often in the form of molasses, was shipped from the Caribbean to Europe or New England, where it was used to make rum. The profits from the sale of sugar were then used to purchase manufactured goods, which were then shipped to West Africa, where they were bartered for slaves. The slaves were then brought back to the Caribbean to be sold to sugar planters. The profits from the sale of the slaves were then used to buy more sugar, which was shipped to Europe. Toil in the sugar plantations became a main basis for a vast network of forced population movement, supplying people to work under brutal coercion. France found its sugarcane islands so valuable that it effectively traded its portion of Canada, famously dismissed by Voltaire as "
a few acres of snow "A few acres of snow" (in the original French, "", , with "") is one of several quotations from Voltaire, an 18th-century writer. They are representative of his sneering evaluation of Canada as lacking economic value and strategic importance to ...
", to Britain for their return of
Guadeloupe Guadeloupe (; ; gcf, label=Antillean Creole, Gwadloup, ) is an archipelago and overseas department and region of France in the Caribbean. It consists of six inhabited islands—Basse-Terre, Grande-Terre, Marie-Galante, La Désirade, and the ...
, Martinique, and
St. Lucia Saint Lucia ( acf, Sent Lisi, french: Sainte-Lucie) is an island country of the West Indies in the eastern Caribbean. The island was previously called Iouanalao and later Hewanorra, names given by the native Arawaks and Caribs, two Amerin ...
at the end of the Seven Years' War. The Dutch similarly kept
Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...
, a sugar colony in South America, instead of seeking the return of the New Netherlands (New York).
Boiling house A boilery or boiling house is a place of boiling, much as a bakery A bakery is an establishment that produces and sells flour-based food baked in an oven such as bread, cookies, cakes, donuts, pastries, and pies. Some retail bakeries are a ...
s in the 17th through 19th centuries converted sugarcane juice into raw sugar. These houses were attached to sugar plantations in the Western colonies. Slaves often ran the boiling process under very poor conditions. Rectangular boxes of brick or stone served as furnaces, with an opening at the bottom to stoke the fire and remove ashes. At the top of each furnace were up to seven copper kettles or boilers, each one smaller and hotter than the previous one. The cane juice began in the largest kettle. The juice was then heated and lime added to remove impurities. The juice was skimmed and then channeled to successively smaller kettles. The last kettle, the "teache", was where the cane juice became syrup. The next step was a cooling trough, where the sugar crystals hardened around a sticky core of molasses. This raw sugar was then shoveled from the cooling trough into
hogshead A hogshead (abbreviated "hhd", plural "hhds") is a large cask of liquid (or, less often, of a food commodity). More specifically, it refers to a specified volume, measured in either imperial or US customary measures, primarily applied to alcoho ...
s (wooden barrels), and from there into the curing house. The passage of the 1833 Slavery Abolition Act led to the abolition of slavery through most of the British Empire, and many of the emancipated slaves no longer worked on sugarcane plantations when they had a choice. West Indian planters, therefore, needed new workers, and they found cheap labour in
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
and India. The people were subject to
indenture An indenture is a legal contract that reflects or covers a debt or purchase obligation. It specifically refers to two types of practices: in historical usage, an indentured servant status, and in modern usage, it is an instrument used for commercia ...
, a long-established form of contract, which bound them to unfree labour for a fixed term. The conditions where the indentured servants worked were frequently abysmal, owing to a lack of care among the planters. The first ships carrying indentured labourers from India left in 1836. The migrations to serve sugarcane plantations led to a significant number of ethnic Indians, Southeast Asians, and Chinese people settling in various parts of the world. In some islands and countries, the South Asian migrants now constitute between 10 and 50% of the population. Sugarcane plantations and Asian ethnic groups continue to thrive in countries such as
Fiji Fiji ( , ,; fj, Viti, ; Fiji Hindi: फ़िजी, ''Fijī''), officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists ...
, South Africa, Burma,
Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
, Malaysia, Indonesia, Philippines,
British Guiana British Guiana was a British colony, part of the mainland British West Indies, which resides on the northern coast of South America. Since 1966 it has been known as the independent nation of Guyana. The first European to encounter Guiana was S ...
, Jamaica, Trinidad, Martinique, French Guiana, Guadeloupe,
Grenada Grenada ( ; Grenadian Creole French: ) is an island country in the West Indies in the Caribbean Sea at the southern end of the Grenadines island chain. Grenada consists of the island of Grenada itself, two smaller islands, Carriacou and Pe ...
,
St. Lucia Saint Lucia ( acf, Sent Lisi, french: Sainte-Lucie) is an island country of the West Indies in the eastern Caribbean. The island was previously called Iouanalao and later Hewanorra, names given by the native Arawaks and Caribs, two Amerin ...
,
St. Vincent Saint Vincent may refer to: People Saints * Vincent of Saragossa (died 304), a.k.a. Vincent the Deacon, deacon and martyr * Saint Vincenca, 3rd century Roman martyress, whose relics are in Blato, Croatia * Vincent, Orontius, and Victor (died 305) ...
,
St. Kitts Saint Kitts, officially the Saint Christopher Island, is an island in the West Indies. The west side of the island borders the Caribbean Sea, and the eastern coast faces the Atlantic Ocean. Saint Kitts and the neighbouring island of Nevis cons ...
, St. Croix,
Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...
, Nevis, and Mauritius. Between 1863 and 1900, merchants and plantation owners in Queensland and New South Wales (now part of the Commonwealth of Australia) brought between 55,000 and 62,500 people from the South
Pacific Islands Collectively called the Pacific Islands, the islands in the Pacific Ocean are further categorized into three major island groups: Melanesia, Micronesia, and Polynesia. Depending on the context, the term ''Pacific Islands'' may refer to one of se ...
to work on sugarcane plantations. An estimated one-third of these workers were coerced or kidnapped into slavery (known as blackbirding). Many others were paid very low wages. Between 1904 and 1908, most of the 10,000 remaining workers were deported in an effort to keep Australia racially homogeneous and protect white workers from cheap foreign labour. Cuban sugar derived from sugarcane was exported to the USSR, where it received price supports and was ensured a guaranteed market. The 1991 dissolution of the Soviet state forced the closure of most of Cuba's sugar industry. Sugarcane remains an important part of the economy of
Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...
, Belize, Barbados, and
Haiti Haiti (; ht, Ayiti ; French: ), officially the Republic of Haiti (); ) and formerly known as Hayti, is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean Sea, east of Cuba and Jamaica, and ...
, along with the Dominican Republic, Guadeloupe, Jamaica, and other islands. About 70% of the sugar produced globally comes from ''S. officinarum'' and hybrids using this species.


Cultivation

Sugarcane cultivation requires a tropical or
subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...
climate, with a minimum of of annual moisture. It is one of the most efficient photosynthesizers in the plant kingdom. It is a C4 plant, able to convert up to 1% of incident solar energy into biomass. In primary growing regions across the tropics and
subtropics The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from to approximately 35° north and ...
, sugarcane crops can produce over 15 kg/m2 of cane. Once a major crop of the southeastern region of the United States, sugarcane cultivation declined there during the late 20th century, and is primarily confined to small plantations in Florida, Louisiana, and southeast Texas in the 21st century. Sugarcane cultivation ceased in Hawaii when the last operating sugar plantation in the state shut down in 2016. Sugarcane is cultivated in the tropics and subtropics in areas with a plentiful supply of water for a continuous period of more than 6–7 months each year, either from natural rainfall or through irrigation. The crop does not tolerate severe frosts. Therefore, most of the world's sugarcane is grown between 22°N and 22°S, and some up to 33°N and 33°S. When sugarcane crops are found outside this range, such as the Natal region of South Africa, it is normally due to anomalous climatic conditions in the region, such as warm ocean currents that sweep down the coast. In terms of altitude, sugarcane crops are found up to close to the equator in countries such as
Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...
, Ecuador, and Peru. Sugarcane can be grown on many soils ranging from highly fertile, well-drained
mollisol Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil (a horizon), typically between 60 and 80 cm in depth. This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of M ...
s, through heavy cracking vertisols, infertile acid
oxisol Oxisols are a soil order in USDA soil taxonomy, best known for their occurrence in tropical rain forest within 25 degrees north and south of the Equator. In the World Reference Base for Soil Resources (WRB), they belong mainly to the ferralsols ...
s and ultisols, peaty
histosol In both the World Reference Base for Soil Resources (WRB) and the USDA soil taxonomy, a Histosol is a soil consisting primarily of organic materials. They are defined as having or more of organic soil material in the upper . Organic soil materia ...
s, to rocky
andisol In USDA soil taxonomy USDA soil taxonomy (ST) developed by the United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly the ...
s. Both plentiful sunshine and water supplies increase cane production. This has made desert countries with good irrigation facilities such as Egypt some of the highest-yielding sugarcane-cultivating regions. Sugarcane consumes 9% of the world's potash fertilizer production. Although some sugarcanes produce seeds, modern stem cutting has become the most common reproduction method. Each cutting must contain at least one bud, and the cuttings are sometimes hand-planted. In more technologically advanced countries, such as the United States and Australia,
billet planting A billet is a living-quarters to which a soldier is assigned to sleep. Historically, a billet was a private dwelling that was required to accept the soldier. Soldiers are generally billeted in barracks or garrisons when not on combat duty, al ...
is common. Billets (stalks or stalk sections) harvested by a mechanical harvester are planted by a machine that opens and recloses the ground. Once planted, a stand can be harvested several times; after each harvest, the cane sends up new stalks, called
ratoon Ratooning is the agricultural practice of harvesting a monocot crop by cutting most of the above-ground portion but leaving the roots and the growing shoot apices intact so as to allow the plants to recover and produce a fresh crop in the next se ...
s. Successive harvests give decreasing yields, eventually justifying replanting. Two to 10 harvests are usually made depending on the type of culture. In a country with a mechanical agriculture looking for a high production of large fields, as in North America, sugarcanes are replanted after two or three harvests to avoid a lowering yields. In countries with a more traditional type of agriculture with smaller fields and hand harvesting, as in the French island la Réunion, sugarcane is often harvested up to 10 years before replanting. Sugarcane is harvested by hand and mechanically. Hand harvesting accounts for more than half of production, and is dominant in the developing world. In hand harvesting, the field is first set on fire. The fire burns up dry leaves, and chases away or kills venomous snakes, without harming the stalks and roots. Harvesters then cut the cane just above ground-level using cane knives or machetes. A skilled harvester can cut of sugarcane per hour. Mechanical harvesting uses a
combine Combine may refer to: Machinery * Combine harvester, or combine, a machine to harvest grain crops * Combine seeder, or combine, a machine to plant seeds Company structure * Corporate group, an industrial business group in Western democracie ...
, or
sugarcane harvester A sugarcane harvester is a large piece of agricultural machinery used to harvest and partially process sugarcane. The machine, originally developed in the 1920s, remains similar in function and design to the combine harvester. Essentially a stora ...
. The Austoft 7000 series, the original modern harvester design, has now been copied by other companies, including Cameco / 
John Deere Deere & Company, doing business as John Deere (), is an American corporation that manufactures agricultural machinery, heavy equipment, forestry machinery, diesel engines, drivetrains (axles, transmissions, gearboxes) used in heavy equipment, ...
. The machine cuts the cane at the base of the stalk, strips the leaves, chops the cane into consistent lengths and deposits it into a transporter following alongside. The harvester then blows the trash back onto the field. Such machines can harvest each hour, but harvested cane must be rapidly processed. Once cut, sugarcane begins to lose its sugar content, and damage to the cane during mechanical harvesting accelerates this decline. This decline is offset because a modern chopper harvester can complete the harvest faster and more efficiently than hand cutting and loading. Austoft also developed a series of hydraulic high-lift infield transporters to work alongside its harvesters to allow even more rapid transfer of cane to, for example, the nearest railway siding. This mechanical harvesting does not require the field to be set on fire; the residue left in the field by the machine consists of cane tops and dead leaves, which serve as mulch for the next planting.


Pests

The cane beetle (also known as cane grub) can substantially reduce crop yield by eating roots; it can be controlled with imidacloprid (Confidor) or chlorpyrifos (Lorsban). Other important pests are the larvae of some butterfly/moth species, including the turnip moth, the
sugarcane borer ''Diatraea saccharalis'', the sugarcane borer, is a species of moth of the family Crambidae. It was described by Johan Christian Fabricius in 1794. It is native to the Caribbean, Central America, and the warmer parts of South America south to n ...
(''Diatraea saccharalis''), the African sugarcane borer (''Eldana saccharina''), the Mexican rice borer (''
Eoreuma ''Eoreuma'' is a genus of moths of the family Crambidae The Crambidae are the grass moth family of lepidopterans. They are variable in appearance, the nominal subfamily Crambinae (grass moths) taking up closely folded postures on grass stems w ...
loftini''), the
African armyworm The African armyworm (''Spodoptera exempta''), also called ''okalombo'', ''kommandowurm'', or nutgrass armyworm, is a species of moth of the family Noctuidae. The larvae often exhibit marching behavior when traveling to feeding sites, leading t ...
(''Spodoptera exempta''), leaf-cutting ants, termites, spittlebugs (especially ''Mahanarva fimbriolata'' and ''Deois flavopicta''), and the beetle ''Migdolus fryanus''. The
planthopper A planthopper is any insect in the infraorder Fulgoromorpha, in the suborder Auchenorrhyncha, a group exceeding 12,500 described species worldwide. The name comes from their remarkable resemblance to leaves and other plants of their environment ...
insect ''
Eumetopina flavipes ''Eumetopina flavipes'', the island sugarcane planthopper, is a species of planthopper present throughout South East Asia. ''E. flavipes'' is a vector for Ramu stunt disease, a plant disease which affects sugarcane. Ramu stunt disease is widespre ...
'' acts as a virus vector, which causes the sugarcane disease
ramu stunt ''Eumetopina flavipes'', the island sugarcane planthopper, is a species of planthopper present throughout South East Asia. ''E. flavipes'' is a vector for Ramu stunt disease, a plant disease which affects sugarcane. Ramu stunt disease is widespre ...
.


Pathogens

Numerous pathogens infect sugarcane, such as
sugarcane grassy shoot disease Sugarcane grassy shoot disease (SCGS), is associated with ‘ ''Candidatus'' Phytoplasma sacchari’ which are small, pleomorphic, pathogenic bacteria that contributes to yield losses from 5% up to 20% in sugarcane. These losses are higher in the ...
caused by '
Candidatus Phytoplasma sacchari ''Candidatus'' Phytoplasma sacchari is a species of phytoplasma pathogen associated with sugarcane grassy shoot disease (SCGS). This SCGS phytoplasma belongs to the Rice Yellow Dwarf Rice is the seed of the grass species ''Oryza sativa'' ...
', whiptail disease or sugarcane smut, ''pokkah boeng'' caused by '' Fusarium moniliforme'',
Xanthomonas axonopodis ''Xanthomonas'' (from greek: ''xanthos'' – “yellow”; ''monas'' – “entity”) is a genus of bacteria, many of which cause plant diseases. There are at least 27 plant associated ''Xanthomonas spp.'', that all together infect at least 400 ...
bacteria causes Gumming Disease, and
red rot Red rot is a degradation process found in vegetable-tanned leather. Red rot is caused by prolonged storage or exposure to high relative humidity, environmental pollution, and high temperature. In particular, red rot occurs at pH values of 4.2 ...
disease caused by ''
Colletotrichum falcatum ''Glomerella tucumanensis'' is a species of fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These or ...
''.
Viral Viral means "relating to viruses" (small infectious agents). Viral may also refer to: Viral behavior, or virality Memetic behavior likened that of a virus, for example: * Viral marketing, the use of existing social networks to spread a marke ...
diseases affecting sugarcane include
sugarcane mosaic virus ''Sugarcane mosaic virus'' (SCMV) is a plant pathogenic virus of the family ''Potyviridae''. The virus was first noticed in Puerto Rico in 1916 and spread rapidly throughout the southern United States in the early 1920s. SCMV is of great concern ...
, maize streak virus, and sugarcane yellow leaf virus.


Nitrogen fixation

Some sugarcane varieties are capable of fixing atmospheric nitrogen in association with the bacterium ''
Gluconacetobacter diazotrophicus ''Gluconacetobacter diazotrophicus'' is a bacterium with a rod-like shape, has circular ends, and can be classified as a Gram-negative bacterium. The bacterium is known for stimulating plant growth and being tolerant to acetic acid. With one to ...
''. Unlike
legume A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes are grown agriculturally, primarily for human consumption, for livestock f ...
s and other nitrogen-fixing plants that form
root nodule Root nodules are found on the roots of plants, primarily legumes, that form a symbiosis with nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known a ...
s in the soil in association with bacteria, ''G. diazotrophicus'' lives within the intercellular spaces of the sugarcane's stem. Coating seeds with the bacteria is a newly developed technology that can enable every crop species to fix nitrogen for its own use.


Conditions for sugarcane workers

At least 20,000 people are estimated to have died of chronic kidney disease in Central America in the past two decades – most of them sugarcane workers along the Pacific coast. This may be due to working long hours in the heat without adequate fluid intake. Not only are they dying because of exhaustion but some of the workers are being exposed to several hazards such as, high temperatures, harmful pesticides, and poisonous or venomous animals. This all occurs during the process of cutting the sugarcane manually, also causing physical ailments by doing the same movements for hours every work day.


Processing

Traditionally, sugarcane processing requires two stages. Mills extract raw sugar from freshly harvested cane and "mill-white" sugar is sometimes produced immediately after the first stage at sugar-extraction mills, intended for local consumption. Sugar crystals appear naturally white in color during the crystallization process. Sulfur dioxide is added to inhibit the formation of color-inducing molecules and to stabilize the sugar juices during evaporation. Refineries, often located nearer to consumers in North America, Europe, and Japan, then produce refined white sugar, which is 99% sucrose. These two stages are slowly merging. Increasing affluence in the sugarcane-producing tropics increases demand for refined sugar products, driving a trend toward combined milling and refining.


Milling

Sugarcane processing produces cane sugar (sucrose) from sugarcane. Other products of the processing include bagasse, molasses, and filtercake. Bagasse, the residual dry fiber of the cane after cane juice has been extracted, is used for several purposes: *fuel for the boilers and kilns *production of paper, paperboard products, and reconstituted panelboard *agricultural mulch *as a raw material for production of chemicals The primary use of bagasse and bagasse residue is as a fuel source for the boilers in the generation of process steam in sugar plants. Dried filtercake is used as an animal feed supplement, fertilizer, and source of
sugarcane wax Sugarcane wax is a wax extracted from sugarcane. Production The production of sugarcane wax is difficult and economically intensive. Sugarcane is used almost exclusively to produce sugar. More importantly, there is just about 0.1% of sugarcane ...
. Molasses is produced in two forms: blackstrap, which has a characteristic strong flavor, and a purer
molasses Molasses () is a viscous substance resulting from refining sugarcane or sugar beets into sugar. Molasses varies in the amount of sugar, method of extraction and age of the plant. Sugarcane molasses is primarily used to sweeten and flavour foods ...
syrup. Blackstrap molasses is sold as a food and dietary supplement. It is also a common ingredient in animal feed, and is used to produce ethanol, rum, and citric acid. Purer molasses syrups are sold as molasses, and may also be blended with
maple syrup Maple syrup is a syrup made from the sap of maple trees. In cold climates, these trees store starch in their trunks and roots before winter; the starch is then converted to sugar that rises in the sap in late winter and early spring. Maple tree ...
, invert sugars, or
corn syrup Corn syrup is a food syrup which is made from the starch of corn (called maize in many countries) and contains varying amounts of sugars: glucose, maltose and higher oligosaccharides, depending on the grade. Corn syrup is used in foods to softe ...
. Both forms of molasses are used in baking.


Refining

Sugar refining Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose, fructose, and galactose. Compound sugars, also called disaccharides or double ...
further purifies the raw sugar. It is first mixed with heavy syrup and then centrifuged in a process called "affination". Its purpose is to wash away the sugar crystals' outer coating, which is less pure than the crystal interior. The remaining sugar is then dissolved to make a syrup, about 60% solids by weight. The sugar solution is clarified by the addition of phosphoric acid and
calcium hydroxide Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca( OH)2. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed or slaked with water. It has m ...
, which combine to precipitate calcium phosphate. The calcium phosphate particles entrap some impurities and absorb others, and then float to the top of the tank, where they can be skimmed off. An alternative to this "phosphatation" technique is " carbonatation", which is similar, but uses carbon dioxide and calcium hydroxide to produce a calcium carbonate precipitate. After filtering any remaining solids, the clarified syrup is decolorized by filtration through
activated carbon Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses. It is processed (activated) to have small, low-volume pores that increase the surface area avail ...
. Bone char or coal-based activated carbon is traditionally used in this role. Some remaining color-forming impurities are
adsorb Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a fl ...
ed by the carbon. The purified syrup is then concentrated to supersaturation and repeatedly crystallized in a vacuum, to produce white refined sugar. As in a sugar mill, the sugar crystals are separated from the molasses by centrifuging. Additional sugar is recovered by blending the remaining syrup with the washings from affination and again crystallizing to produce brown sugar. When no more sugar can be economically recovered, the final molasses still contains 20–30% sucrose and 15–25% glucose and fructose. To produce granulated sugar, in which individual grains do not clump, sugar must be dried, first by heating in a rotary dryer, and then by blowing cool air through it for several days.


Ribbon cane syrup

Ribbon cane is a subtropical type that was once widely grown in the Southern United States, as far north as coastal North Carolina. The juice was extracted with horse- or mule-powered crushers; the juice was boiled, like
maple syrup Maple syrup is a syrup made from the sap of maple trees. In cold climates, these trees store starch in their trunks and roots before winter; the starch is then converted to sugar that rises in the sap in late winter and early spring. Maple tree ...
, in a flat pan, and then used in the syrup form as a food sweetener. It is not currently a commercial crop, but a few growers find ready sales for their product.


Pollution from sugarcane processing

Particulate matter, combustion products, and volatile organic compounds are the primary pollutants emitted during the sugarcane processing. Combustion products include nitrogen oxides (NOX), carbon monoxide (CO), CO2, and sulfur oxides (SOX). Potential emission sources include the sugar granulators, sugar conveying and packaging equipment, bulk loadout operations, boilers, granular carbon and char regeneration kilns, regenerated adsorbent transport systems, kilns and handling equipment (at some facilities), carbonation tanks, multi-effect evaporator stations, and vacuum boiling pans.


Production

In 2020, global production of sugarcane was 1.87 billion tonnes, with Brazil producing 40% of the world total, India with 20%, and China producing 6% (table). Worldwide, 26 million hectares were devoted to sugarcane cultivation in 2020. The average worldwide yield of sugarcane crops in 2020 was 71 tonnes per hectare, led by Peru with 123 tonnes per hectare. The theoretical possible yield for sugarcane is about 280 tonnes per hectare per year, and small experimental plots in Brazil have demonstrated yields of 236–280 tonnes of cane per hectare. From 2008 to 2016, production of standards-compliant sugarcane experienced a compound annual growth rate of about 52%, while conventional sugarcane increased at less than 1%.


Ethanol

Ethanol is generally available as a byproduct of sugar production. It can be used as a biofuel alternative to gasoline, and is widely used in cars in Brazil. It is an alternative to gasoline, and may become the primary product of sugarcane processing, rather than sugar. In Brazil, gasoline is required to contain at least 22% bioethanol. This bioethanol is sourced from Brazil's large sugarcane crop. The production of ethanol from sugarcane is more energy efficient than from corn or sugar beets or palm/vegetable oils, particularly if cane bagasse is used to produce heat and power for the process. Furthermore, if biofuels are used for crop production and transport, the fossil energy input needed for each ethanol energy unit can be very low. EIA estimates that with an integrated sugar cane to ethanol technology, the well-to-wheels CO2 emissions can be 90% lower than conventional gasoline. A textbook on renewable energy describes the energy transformation:
Presently, 75 tons of raw sugar cane are produced annually per hectare in Brazil. The cane delivered to the processing plant is called burned and cropped (b&c), and represents 77% of the mass of the raw cane. The reason for this reduction is that the stalks are separated from the leaves (which are burned and whose ashes are left in the field as fertilizer), and from the roots that remain in the ground to sprout for the next crop. Average cane production is, therefore, 58 tons of b&c per hectare per year.
Each ton of b&c yields 740 kg of juice (135 kg of sucrose and 605 kg of water) and 260 kg of moist bagasse (130 kg of dry bagasse). Since the lower heating value of sucrose is 16.5 M J/kg, and that of the bagasse is 19.2 MJ/kg, the total heating value of a ton of b&c is 4.7 GJ of which 2.2 GJ come from the sucrose and 2.5 from the bagasse.
Per hectare per year, the biomass produced corresponds to 0.27 TJ. This is equivalent to 0.86 W per square meter. Assuming an average insolation of 225 W per square meter, the photosynthetic efficiency of sugar cane is 0.38%.
The 135 kg of sucrose found in 1 ton of b&c are transformed into 70 litres of ethanol with a combustion energy of 1.7 GJ. The practical sucrose-ethanol conversion efficiency is, therefore, 76% (compare with the theoretical 97%).
One hectare of sugar cane yields 4,000 litres of ethanol per year (without any additional energy input, because the bagasse produced exceeds the amount needed to distill the final product). This, however, does not include the energy used in tilling, transportation, and so on. Thus, the solar energy-to-ethanol conversion efficiency is 0.13%.


Bagasse applications

Sugarcane is a major crop in many countries. It is one of the plants with the highest bioconversion efficiency. Sugarcane crop is able to efficiently fix solar energy, yielding some 55 tonnes of dry matter per hectare of land annually. After harvest, the crop produces sugar juice and bagasse, the fibrous dry matter. This dry matter is biomass with potential as fuel for energy production. Bagasse can also be used as an alternative source of pulp for paper production. Sugarcane bagasse is a potentially abundant source of energy for large producers of sugarcane, such as Brazil, India, and China. According to one report, with use of latest technologies, bagasse produced annually in Brazil has the potential of meeting 20% of Brazil's energy consumption by 2020.


Electricity production

A number of countries, in particular those lacking fossil fuels, have implemented energy conservation and efficiency measures to minimize the energy used in cane processing, and export any excess electricity to the grid. Bagasse is usually burned to produce steam, which in turn creates electricity. Current technologies, such as those in use in Mauritius, produce over 100 kWh of electricity per tonne of bagasse. With a total world harvest of over one billion tonnes of sugar cane per year, the global energy potential from bagasse is over 100,000 GWh. Using Mauritius as a reference, an annual potential of 10,000 GWh of additional electricity could be produced throughout Africa. Electrical generation from bagasse could become quite important, particularly to the rural populations of sugarcane producing nations. Recent cogeneration technology plants are being designed to produce from 200 to over 300 kWh of electricity per tonne of bagasse. As sugarcane is a seasonal crop, shortly after harvest the supply of bagasse would peak, requiring power generation plants to strategically manage the storage of bagasse.


Biogas production

A greener alternative to burning bagasse for the production of electricity is to convert bagasse into biogas. Technologies are being developed to use enzymes to transform bagasse into advanced
biofuel Biofuel is a fuel that is produced over a short time span from biomass, rather than by the very slow natural processes involved in the formation of fossil fuels, such as oil. According to the United States Energy Information Administration (E ...
and biogas.


Sugarcane as food

In most countries where sugarcane is cultivated, several foods and popular dishes are derived directly from it, such as: * Raw sugarcane: chewed to extract the juice * ''Sayur nganten'': an
Indonesian Indonesian is anything of, from, or related to Indonesia, an archipelagic country in Southeast Asia. It may refer to: * Indonesians, citizens of Indonesia ** Native Indonesians, diverse groups of local inhabitants of the archipelago ** Indonesian ...
soup made with the stem of trubuk (''Saccharum edule''), a type of sugarcane * Sugarcane juice: a combination of fresh juice, extracted by hand or small mills, with a touch of lemon and ice to make a popular drink, known variously as ''air tebu'', ''usacha rass'', ''guarab'', ''guarapa,'' ''guarapo,'' ''papelón'', ''aseer asab'', ''ganna sharbat'', ''mosto'', ''caldo de cana'', or ''nước mía'' * Syrup: a traditional sweetener in soft drinks, now largely supplanted in the US by high fructose corn syrup, which is less expensive because of corn subsidies and sugar tariffs *
Molasses Molasses () is a viscous substance resulting from refining sugarcane or sugar beets into sugar. Molasses varies in the amount of sugar, method of extraction and age of the plant. Sugarcane molasses is primarily used to sweeten and flavour foods ...
: used as a sweetener and a syrup accompanying other foods, such as cheese or cookies *
Jaggery Jaggery is a traditional non-centrifugal cane sugar consumed in the Indian Subcontinent, Southeast Asia, and Africa. It is a concentrated product of cane juice and often date or palm sap without separation of the molasses and crystals, and can ...
: a solidified molasses, known as ''gur'', ''gud'', or ''gul'' in South Asia, is traditionally produced by evaporating juice to make a thick sludge, and then cooling and molding it in buckets. Modern production partially freeze dries the juice to reduce caramelization and lighten its color. It is used as sweetener in cooking traditional entrees, sweets, and desserts. * Falernum: a sweet, and slightly alcoholic drink made from sugarcane juice * '' Cachaça'': the most popular
distilled Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation, usually inside an apparatus known as a still. Dry distillation is the heating ...
alcoholic beverage in Brazil; it is a liquor made of the distillation of sugarcane juice. * Rum is a liquor made from sugarcane products, typically molasses, but sometimes also cane juice. It is most commonly produced in the Caribbean and environs. * Basi is a fermented alcoholic beverage made from sugarcane juice produced in the Philippines and
Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...
. * '' Panela'', solid pieces of sucrose and
fructose Fructose, or fruit sugar, is a Ketose, ketonic monosaccharide, simple sugar found in many plants, where it is often bonded to glucose to form the disaccharide sucrose. It is one of the three dietary monosaccharides, along with glucose and galacto ...
obtained from the boiling and evaporation of sugarcane juice, is a food staple in Colombia and other countries in South and Central America. * '' Rapadura'' is a sweet flour that is one of the simplest refinings of sugarcane juice, common in Latin American countries such as Brazil, Argentina, and Venezuela (where it is known as ''papelón'') and the Caribbean. * Rock candy: crystallized cane juice *''
Gâteau de Sirop Gâteau de Sirop is a syrup cake in Cajun cuisine. It is made with cane syrup.Gâteau de Sirop
August 2020 Bon ...
'' * Viche, a homebrewed Colombian alcoholic beverage


Sugarcane as feed

Many parts of the sugarcane are commonly used as animal feeds where the plants are cultivated. The leaves make a good forage for ruminants.


Gallery

File:Sugarcane bsri 34.jpg, Sugarcane fields in
Bangladesh Sugarcane Research Institute Bangladesh Sugarcrop Research Institute or BSRI, is an autonomous national research institute that carries out research on sugarcane and other related plants. It is located in Ishwardi Upazila, Pabna, Bangladesh. It falls under the Ministry o ...
(BSRI) File:Sugarcane bD.jpg, Sugarcane fields in BSRI File:Sugarcane Bd.jpg, Sugarcane fields in BSRI File:Sugarcane re.jpg, Sugarcane fields in BSRI File:Sugarcane vendor in Dhaka.jpg, Sugarcane vendor in Dhaka File:Sugarcane stalks.jpg, Sugarcane stalks File:Sugarcane flowering.JPG, Sugarcane flowering File:Sugarcane plantation 01.jpg, Sugarcane plantation File:Sugarcane field of Kachirapalayam.jpg, Leaves of sugarcane File:Sugarcane in Hoshiarpur.jpg, Sugarcane plantation File:Sugarcane of Chinna Salem.jpg, Sugarcane of China File:Sugarcane of Salem.jpg, Sugarcane File:Sugarcane Flowers in Java.jpg, Flowers of sugarcane File:Woman collecting sugar canes in Vietnam.jpg, Sugarcane harvested by women, Hòa Bình Province, Vietnam File:Cane syrup evaporator 1330.jpg, alt=Outdoor photo of series of rectangular metal trays divided by short internal metal sheets, Evaporator with baffled pan and foam dipper for making ribbon cane syrup File:A video of Sugarcane juice extraction.ogv, A video of sugarcane juice extraction File:CSIRO ScienceImage 10529 Sugarcane and bowl of sugar.jpg, Sugarcane and bowl of refined sugar File:Cocktail Caipirinha raw.jpg, ''Caipirinha'', a cocktail made from sugarcane-derived ''cachaça'' File:Sugarcane Processing.jpg, Sugarcane processing File:Mai saida rake.jpg, Hausa man selling sugarcane at Kaduna in Nigeria


See also

* Sugar plantations in the Caribbean *
Sugar plantations in Hawaii Sugarcane was introduced to Hawaiʻi by its first inhabitants in approximately 600 AD and was observed by Captain Cook upon arrival in the islands in 1778.Deerr, 1949 Sugar quickly turned into a big business and generated rapid population growt ...
* Sugar industry of the Philippines * Trapiche


References


External links

* * * Global sugar & sugar cane production stat
from oecd
{{Authority control * Sugar Crops originating from Asia Energy crops Ethanol fuel Flora of tropical Asia Articles containing video clips Crops Tropical agriculture Plant common names