Sal (Shorea robusta)- flowering canopy W Picture 117

Sal (Shorea robusta)- new leaves with flower buds at Jayanti, Duars W Picture 120

''Shorea robusta'' seed oil is an

edible oil Cooking oil is plant, animal, or synthetic liquid fat used in frying, baking, and other types of cooking. It is also used in food preparation and flavoring not involving heat, such as salad dressings and bread dips, and may be called edible oil ...

extracted from the seeds of ''

Shorea robusta ''Shorea robusta'', the sal tree, sāla, shala, sakhua, or sarai, is a species of tree in the family Dipterocarpaceae. The tree is native to India, Bangladesh, Nepal, Tibet and across the Himalayan regions . Evolution Fossil evidence from l ...

''. ''Shorea robusta'' is known as the Sal tree in

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...

. Sal is

indigenous Indigenous may refer to: *Indigenous peoples *Indigenous (ecology), presence in a region as the result of only natural processes, with no human intervention *Indigenous (band), an American blues-rock band *Indigenous (horse), a Hong Kong racehorse ...

to India and occurs in two main regions separated by the

Gangetic Plain The Indo-Gangetic Plain, also known as the North Indian River Plain, is a fertile plain encompassing northern regions of the Indian subcontinent, including most of northern and eastern India, around half of Pakistan, virtually all of Bang ...

, namely the northern and central Indian regions. The plant belongs to the ''

Dipterocarpaceae Dipterocarpaceae is a family of 16 genera and about 695 known species of mainly tropical lowland rainforest trees. The family name, from the type genus ''Dipterocarpus'', is derived from Greek (''di'' = two, ''pteron'' = wing and ''karpos'' = fru ...

'' botanical family.

Common name in Indian languages

*Common name: Sal *

Hindi Hindi (Devanāgarī: or , ), or more precisely Modern Standard Hindi (Devanagari: ), is an Indo-Aryan language spoken chiefly in the Hindi Belt region encompassing parts of northern, central, eastern, and western India. Hindi has been ...

:( साल) Sal, Salwa, Sakhu, Sakher * Marathi: sal, guggilu, rala, sajara +

Telugu Telugu may refer to: * Telugu language, a major Dravidian language of India *Telugu people, an ethno-linguistic group of India * Telugu script, used to write the Telugu language ** Telugu (Unicode block), a block of Telugu characters in Unicode ...

: Guggilamu *

Tamil Tamil may refer to: * Tamils, an ethnic group native to India and some other parts of Asia ** Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils **Tamil Malaysians, Tamil people native to Malaysia * Tamil language, na ...

: attam, venkungiliyam, kungiliyam *

Malayalam Malayalam (; , ) is a Dravidian language spoken in the Indian state of Kerala and the union territories of Lakshadweep and Puducherry ( Mahé district) by the Malayali people. It is one of 22 scheduled languages of India. Malayalam wa ...

: kaimaruthu, kungiliyam, maramaram *

Kannada Kannada (; ಕನ್ನಡ, ), originally romanised Canarese, is a Dravidian language spoken predominantly by the people of Karnataka in southwestern India, with minorities in all neighbouring states. It has around 47 million native s ...

: ashvakarna, asina, asu, bile-bhogimara *

Bengali Bengali or Bengalee, or Bengalese may refer to: *something of, from, or related to Bengal, a large region in South Asia * Bengalis, an ethnic and linguistic group of the region * Bengali language, the language they speak ** Bengali alphabet, the w ...

: Sal * Oriya: sala *

Urdu Urdu (;"Urdu"
'' Assamese: Sal, Hal *

Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had Trans-cultural diffusion ...

: agnivallabha, ashvakarna, ashvakarnika

Tree

''S. robusta'' is a deciduous tree that reaches up to , with a trunk circumference up to . Under normal conditions they reach with girths of . The trunk is clean, straight and cylindrical, often bearing

epicormic An epicormic shoot is a shoot growing from an epicormic bud, which lies underneath the bark of a trunk, stem, or branch of a plant. Epicormic buds lie dormant beneath the bark, their growth suppressed by hormones from active shoots higher up ...

branches. The crown is spreading and spherical. The bark is dark brown and thick, with longitudinal fissures deep in poles, becoming shallow in mature trees, and provides effective fire protection. The tree develops a long

taproot A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproo ...

at a young age. The tree grows at altitude. The mean annual temperature required is between and . The tree requires mean annual rainfall between and maximum of . ''S. robusta'' flourishes best in deep, well-drained, moist, slightly acid, sandy to clayey soils. It does not tolerate waterlogging. The most favourable soil is a moist sandy

loam Loam (in geology and soil science) is soil composed mostly of sand ( particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–si ...

with good

subsoil Subsoil is the layer of soil under the topsoil on the surface of the ground. Like topsoil, it is composed of a variable mixture of small particles such as sand, silt and clay, but with a much lower percentage of organic matter and humus, and ...

drainage. Soil moisture is essential. Leaves are simple, shiny, about long and broadly oval at the base, with the apex tapering into a long point. New leaves are reddish, soon becoming delicate green. Flowers are yellowish-white, arranged in large terminal or axillary racemose panicles. Fruit at full size is about long and in diameter; it is surrounded by segments of the

calyx Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to: Biology * Calyx (anatomy), collective name for several cup-like structures ...

enlarged into 5 rather unequal wings about long. Fruit content is 66.4%

kernel Kernel may refer to: Computing * Kernel (operating system), the central component of most operating systems * Kernel (image processing), a matrix used for image convolution * Compute kernel, in GPGPU programming * Kernel method, in machine learn ...

and pod, 33.6% is shell and calyx. The fruits generally ripen in May. The seed contains 14-15% fat. It has calyx and wings. The de-winged seeds contain a thin, brittle

seed pod This page provides a glossary of plant morphology. Botanists and other biologists who study plant morphology use a number of different terms to classify and identify plant organs and parts that can be observed using no more than a handheld magnify ...

. The kernel has 5 segments covering the

embryo An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male spe ...

. of seeds give of kernel. The seeds are 10.8% water, 8% protein, 62.7% carbohydrate, 14.8% oil, 1.4% fiber and 2.3% ash.

Habitat

This species ranges south of the

Himalaya The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 10 ...

, from

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

in the east to

Nepal Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is ma ...

and

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mo ...

. The tree is widely distributed in tropical regions and covers about 13.3% of the forested area in the country. Sal (''Shorea robusta'') tree occurs either gregariously or mixed with other trees in Himalayan foot hills and central India. In the Himalayan foothill belt it extends up to

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

valley (including Mefghalaya and Tripura) in the east to foothills of north-west

Bengal Bengal ( ; bn, বাংলা/বঙ্গ, translit=Bānglā/Bôngô, ) is a geopolitical, cultural and historical region in South Asia, specifically in the eastern part of the Indian subcontinent at the apex of the Bay of Bengal, predom ...

Uttar Pradesh Uttar Pradesh (; , 'Northern Province') is a state in northern India. With over 200 million inhabitants, it is the most populated state in India as well as the most populous country subdivision in the world. It was established in 195 ...

, Uttaranchal, Kangra region of Himachala Pradesh. The

separate the Himalayan foothill from the central Indian belt.

Seed collection-oil extraction

Sal is a major means of survival for forest dwellers in the Central Indian states of

Orissa Odisha (English: , ), formerly Orissa ( the official name until 2011), is an Indian state located in Eastern India. It is the 8th largest state by area, and the 11th largest by population. The state has the third largest population of S ...

Chhattisgarh Chhattisgarh (, ) is a landlocked state in Central India. It is the ninth largest state by area, and with a population of roughly 30 million, the seventeenth most populous. It borders seven states – Uttar Pradesh to the north, Madhya Prad ...

and

Madhya Pradesh Madhya Pradesh (, ; meaning 'central province') is a state in central India. Its capital is Bhopal, and the largest city is Indore, with Jabalpur, Ujjain, Gwalior, Sagar, and Rewa being the other major cities. Madhya Pradesh is the second ...

. These three states include the country's largest sal belt. Sal forest covers about 45% of their forested areas. Orissa has the largest sal forest, covering followed by Madhya Pradesh with and Chhattisgarh with . Across these three states some 20-30 million forest dwellers depend on collection of sal seeds, leaves and resins. The proper storage of seeds before processing is crucial. Excess moisture (>6-8%) damages oil quality via ''

Hydrolysis Hydrolysis (; ) is any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution, elimination, and solvation reactions in which water is the nucleophile. Biological hydrolysi ...

'' in the seed fat, with resulting high

free fatty acid In chemistry, particularly in biochemistry, a fatty acid is a carboxylic acid with an aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have an unbranched chain of an even number of carbon atoms, fr ...

oil output. Sal fat is extracted via three methods. Traditionally fat is extracted by water rendering. The second, mechanical system is extraction by oil expeller and rotary mills. The third method is via solvent extraction in which the seed is pressed as flakes first in a flaker mill and exposed to solvent extraction.

Characteristics

The extracted crude sal oil/fat is greenish-brown and has a characteristic odour. Due to the presence of more

saturated fatty acids A saturated fat is a type of fat in which the fatty acid chains have all single bonds. A fat known as a glyceride is made of two kinds of smaller molecules: a short glycerol backbone and fatty acids that each contain a long linear or branched c ...

, it is solid at room temperature. Because of this, it is known as sal fat or sal butter. The oil is used as

cooking oil Cooking oil is plant, animal, or synthetic liquid fat used in frying, baking, and other types of cooking. It is also used in food preparation and flavoring not involving heat, such as salad dressings and bread dips, and may be called edible oil ...

after refining. The oil contains 35-45%

stearic acid Stearic acid ( , ) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a waxy solid and its chemical formula is C17H35CO2H. Its name comes from the Greek word στέαρ "''stéar''", which means ta ...

, an 18-carbon saturated fatty acid, and 40-45%

oleic acid Oleic acid is a fatty acid that occurs naturally in various animal and vegetable fats and oils. It is an odorless, colorless oil, although commercial samples may be yellowish. In chemical terms, oleic acid is classified as a monounsaturated o ...

, which is a mono

unsaturated fatty acid In chemistry, particularly in biochemistry, a fatty acid is a carboxylic acid with an aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have an unbranched chain of an even number of carbon atoms, f ...

, with 18 carbon atoms. The refined oil is used as substitute for

cocoa butter Cocoa butter, also called theobroma oil, is a pale-yellow, edible fat extracted from the cocoa bean. It is used to make chocolate, as well as some ointments, toiletries, and pharmaceuticals. Cocoa butter has a cocoa flavor and aroma. Its melt ...

chocolate Chocolate is a food made from roasted and ground cacao seed kernels that is available as a liquid, solid, or paste, either on its own or as a flavoring agent in other foods. Cacao has been consumed in some form since at least the Olmec ci ...

manufacturing.

Applications

Sal oil or butter is used for cooking locally and used for

soap Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are us ...

up to 30%. Refined, modified fat is a substitute for

and used in confectionery industry. Sal butter is used in the manufacturing of edible

ghee Ghee is a type of clarified butter, originating from India. It is commonly used in India for cooking, as a traditional medicine, and for religious rituals. Description Ghee is typically prepared by simmering butter, which is churned from ...

(''vanaspati''),

paints Paint is any pigmented liquid, liquefiable, or solid mastic composition that, after application to a substrate in a thin layer, converts to a solid film. It is most commonly used to protect, color, or provide texture. Paint can be made in many ...

and

pigments A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compoun ...

lubricants A lubricant (sometimes shortened to lube) is a substance that helps to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, t ...

, auto oil, etc.

References

External links

*https://web.archive.org/web/20130211065905/http://jhamfcofed.com/resources/sal_seed.htm *http://upscguide.com/content/timber-trees-india. {{Non-timber forest products Cooking oils Vegetable oils