Chinese water chestnut | |
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Illustration c. 1880 [1] | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Cyperaceae |
Genus: | Eleocharis |
Species: | E. dulcis |
Binomial name | |
Eleocharis dulcis | |
Synonyms | |
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Eleocharis dulcis | |||||||||||
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Traditional Chinese | 荸薺 | ||||||||||
Simplified Chinese | 荸荠 | ||||||||||
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Cantonese name | |||||||||||
Traditional Chinese | 馬蹄 | ||||||||||
Simplified Chinese | 马蹄 | ||||||||||
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Nutritional value per 100 g (3.5 oz) | |||||||||||||||||||||||||||||||||||||||||||
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Energy | 406 kJ (97 kcal) | ||||||||||||||||||||||||||||||||||||||||||
23.94 g | |||||||||||||||||||||||||||||||||||||||||||
Sugars | 4.8 g | ||||||||||||||||||||||||||||||||||||||||||
Dietary fiber | 3 g | ||||||||||||||||||||||||||||||||||||||||||
0.1 g | |||||||||||||||||||||||||||||||||||||||||||
1.4 g | |||||||||||||||||||||||||||||||||||||||||||
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Other constituents | Quantity | ||||||||||||||||||||||||||||||||||||||||||
Water | 73.5 g | ||||||||||||||||||||||||||||||||||||||||||
†Percentages estimated using US recommendations for adults, [3] except for potassium,which is estimated based on expert recommendation from the National Academies. [4] |
Eleocharis dulcis,the Chinese water chestnut or water chestnut,is a grass-like sedge native to Asia,tropical Africa,and Oceania. It is grown in many countries for its edible corms,but if eaten uncooked,the surface of the plants may transmit fasciolopsiasis.
The water caltrop,which also is referred to by the same name,is unrelated and often confused with the water chestnut.
The water chestnut is not a nut but rather an aquatic vegetable that grows in marshes,under water,or in mud. It has stem-like,tubular green leaves that grow to about 1.5 m (5 ft).
The plant is native to Asia,tropical Africa,and Oceania. [5]
In the dry season of the Northern Territory in Australia,magpie geese eat the bulbs of water chestnuts,allowing them to put on fat for the wet season and ensuring they are ready for breeding. In the wet season,water chestnut leaves are used to build their floating nests. [6]
The crop can be cultivated in paddies,2–7.5 m (7–25 ft) wide by up to 100 m (330 ft) long to allow for mechanization, [7] or in a hydroponic culture. [8] As it is an aquatic plant,it should always be submerged in approximately 10 cm (4 in) of water. [9] The crop needs continuously high soil temperatures,ideally 14–15.5 °C (57–60 °F). [9] At 13.6 °C (56.5 °F),the corms begin to sprout. [7] Soil is ideally a sandy loam with pH 6.5 to 7.2. [10] The plant produces two types of subterranean rhizomes. Under long-daylength conditions,rhizomes grow horizontally and then turn upwards forming daughter plants. Under short-daylength conditions,the rhizomes grow downward and produce a corm at the tip. [9] [7] The photoperiod also significantly influences how fast the corms grow. Corms begin to develop much more slowly if the photoperiod exceeds 12 hours. [11] The corms are also the propagating material. [7] Alternatively,transplants can be used. [8] Machinery,such as tractor-mounted vegetable planters,can be used for plantation. [7]
Nitrogen addition is beneficial for corm production,applying a dose before planting and another dose when corms begin to enlarge. [7] To further improve nutrient levels,potassium and phosphorus mineral fertilizers can be used before planting,where the N : P : K uptake ratio is 1:0.5:1.75. [7] Also organic mulch,especially mushroom compost,shows good results. [7]
Once the corms turn dark brown,they should be harvested. [7] If left in the soil after this point in time,corms will get sweeter,however shelf life will decline. [7] The corms can be harvested using a modified gladiolus corm harvester once the paddy is drained. [8] Alternatively,a "water-suction harvester" can be used without the need to drain the paddy. [7] The corms have to be washed after harvest and brushed once they are dry. [8]
The per plant yield was described at 2.3 kg (5 lb 1 oz) per season (fresh matter). [12] In China,yields are reported between 20–40 t/ha (9–18 short ton/acre), [9] while in the United States a range between 47–85 t/ha (21–38 short ton/acre) has been mentioned. [12]
The harvested corms are best stored at 4 °C (39 °F). At this temperature,transpiration and thus weight loss are minimized. [7] This will also delay sprouting and minimize deterioration resulting from small injuries. [7] Corms should not be stored at temperatures above 13.6 °C (56.5 °F) as otherwise the corms will begin to sprout. [7] If the corms need to be stored longer term,they can also be kept in a bleach solution of 1000 ppm. [13]
Chinese water chestnut is usually not very prone to pests; [8] nevertheless,some animals and fungi may attack the plant:Water fowl may damage the stems and corms,especially when plants are young. [7] Similarly,rodents and grazing animals pose a threat to the Chinese water chestnut,which may be discouraged by keeping the paddy inundated. [7] Caddisfly larvae (Trichoptera) and other leaf-eating caterpillars also feed on the stems. However,unless complete defoliation below the waterline occurs,the plants can normally tolerate this damage. [7] Plant hoppers (Fulgoridae) and scale insects feed on plant sap and may cause subsequent death. [7] Other pests include the nematodes Ditylenchus and Dolichodorus heterocephalus . [9] Fungal species can also attack the Chinese water chestnut. In warmer climates,a rust is caused by Uromyces , [7] and Cylindrosporium eleocharidis causes stem blight. [14]
If eaten uncooked,the surface of the plants may transmit fasciolopsiasis. [15]
Raw water chestnuts are 74% water,24% carbohydrates,1% protein,and contain very little fat. In a 100-gram reference amount,raw water chestnuts supply 410 kilojoules (97 kcal) of food energy,are rich (20% or more of the Daily Value,DV) in vitamin B6 (25% DV),and contain moderate amounts of other B vitamins,manganese,and potassium (10% to 17% DV).
Raw water chestnuts are edible, [16] and are slightly sweet and crunchy. The small,rounded corms have a crisp,white flesh and may be eaten raw,slightly boiled,or grilled,and often are pickled or tinned.[ citation needed ] Boiled water chestnuts have a firm and slightly crunchy texture,with a mild and slightly nutty flavor that may easily be overpowered by seasonings or sauces with which the water chestnut is served or cooked. They may be combined with bamboo shoots,coriander,ginger,sesame oil,and snow peas. Steamed or sauteed vegetable dishes may contain water chestnuts,such as noodle or rice recipes. [17] They may also be added to minced-meat fillings and dishes,such as Cantonese dim sum-style steamed meatballs,to add a crunchy texture. [18] The Thai dessert thapthim krop ,with water chestnuts as its main ingredient,was named one of the world's best 50 desserts in 2019 by CNN Travel. [19]
The corms are a popular ingredient in Chinese cuisine,in which they are most often eaten raw,sometimes sweetened. They also may be ground into a flour form used for making water chestnut cake,which is common as part of dim sum cuisine. They are unusual among vegetables for remaining crisp even after being cooked or canned,because their cell walls are cross-linked and strengthened by certain phenolic compounds,such as oligomers of ferulic acid. [20] This property is shared by other vegetables that remain crisp in this manner,including the tiger nut,lotus root and spurge nettle root. [21] The corms contain the antibiotic agent puchiin, [9] [22] which is stable to high temperature. [23]
Apart from the edible corms,the leaves can be used for cattlefeed,mulch or compost. [12]
Kohlrabi,also called German turnip or turnip cabbage,is a biennial vegetable,a low,stout cultivar of wild cabbage. It is a cultivar of the same species as cabbage,broccoli,cauliflower,kale,Brussels sprouts,collard greens,Savoy cabbage,and gai lan.
The turnip or white turnip is a root vegetable commonly grown in temperate climates worldwide for its white,fleshy taproot. Small,tender varieties are grown for human consumption,while larger varieties are grown as feed for livestock. The name turnip –used in many regions –may also be used to refer to rutabaga,which is a different but related vegetable.
Edamame is an East Asian dish prepared with immature soybeans in the pod. The pods are boiled or steamed and may be served with salt or other condiments. The dish has become popular across the world because it is rich in vitamins,dietary fiber,and isoflavones. When the beans are outside the pod,the term mukimame is also sometimes used in Japanese. Edamame are a common side dish in Japanese cuisine and as an appetizer to alcoholic beverages such as beer or shōchū. As an ingredient Edamame are found in both sweet and savory dishes such as takikomi gohan,tempura,and zunda-mochi.
Broccoli is an edible green plant in the cabbage family whose large flowering head,stalk and small associated leaves are eaten as a vegetable. Broccoli is classified in the Italica cultivar group of the species Brassica oleracea. Broccoli has large flower heads,or florets,usually dark green,arranged in a tree-like structure branching out from a thick stalk,which is usually light green. The mass of flower heads is surrounded by leaves. Broccoli resembles cauliflower,which is a different but closely related cultivar group of the same Brassica species.
The radish is a flowering plant in the mustard family,Brassicaceae. Its large taproot is commonly used as a root vegetable,although the entire plant is edible and its leaves are sometimes used as a leaf vegetable. Originally domesticated in Asia,radishes are now grown and consumed throughout the world. The radish is sometimes considered to form a species complex with the wild radish,and instead given the trinomial name Raphanus raphanistrum subsp. sativus.
Daikon or mooli,Raphanus sativus var. longipinnatus, is a mild-flavored winter radish usually characterized by fast-growing leaves and a long,white,napiform root. Originally native to continental East Asia,daikon is harvested and consumed throughout the region,as well as in South Asia,and is available internationally. In some locations,daikon is planted for its ability to break up compacted soils and recover nutrients and is not harvested.
Root vegetables are underground plant parts eaten by humans as food. In agricultural and culinary terminology,the term applies to true roots such as taproots and tuberous roots as well as non-roots such as bulbs,corms,rhizomes,and stem tubers.
Corm,bulbo-tuber,or bulbotuber is a short,vertical,swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation).
The Brussels sprout is a member of the Gemmifera cultivar group of cabbages,grown for its edible buds.
Bok choy,pak choi or pok choi is a type of Chinese cabbage,used as food. Chinensis varieties do not form heads and have green leaf blades with lighter bulbous bottoms instead,forming a cluster reminiscent of mustard greens. Its flavour is described as being between spinach and water chestnuts but slightly sweeter,with a mildly peppery undertone. The green leaves have a stronger flavor than the white bulb.
The water caltrop is any of three extant species of the genus Trapa:Trapa natans,Trapa bicornis and the endangered Trapa rossica. It is also known as buffalo nut,bat nut,devil pod,ling nut,mustache nut,singhara nut or water chestnut.
The yacón is a species of daisy traditionally grown in the northern and central Andes from Colombia to northern Argentina for its crisp,sweet-tasting,tuberous roots. Their texture and flavour are very similar to jícama,mainly differing in that yacón has some slightly sweet,resinous,and floral undertones to its flavour,probably due to the presence of inulin,which produces the sweet taste of the roots of elecampane,as well. Another name for yacón is Peruvian ground apple,possibly from the French name of potato,pomme de terre. The tuber is composed mostly of water and various polysaccharides.
Taro is a root vegetable. It is the most widely cultivated species of several plants in the family Araceae that are used as vegetables for their corms,leaves,stems and petioles. Taro corms are a food staple in African,Oceanic,East Asian,Southeast Asian and South Asian cultures. Taro is believed to be one of the earliest cultivated plants.
Water chestnut may refer to either of two plants,both used in Chinese cuisine:
Yam is the common name for some plant species in the genus Dioscorea that form edible tubers.
Vegetables are parts of plants that are consumed by humans or other animals as food. The original meaning is still commonly used and is applied to plants collectively to refer to all edible plant matter,including the flowers,fruits,stems,leaves,roots,and seeds. An alternative definition of the term is applied somewhat arbitrarily,often by culinary and cultural tradition. It may exclude foods derived from some plants that are fruits,flowers,nuts,and cereal grains,but include savoury fruits such as tomatoes and courgettes,flowers such as broccoli,and seeds such as pulses.
Eleocharis is a virtually cosmopolitan genus of 250 or more species of flowering plants in the sedge family,Cyperaceae. The name is derived from the Greek words ἕλειος(heleios),meaning "marsh dweller," and χάρις(charis),meaning "grace." Members of the genus are known commonly as spikerushes or spikesedges. The genus has a geographically cosmopolitan distribution,with centers of diversity in the Amazon Rainforest and adjacent eastern slopes of the South American Andes,northern Australia,eastern North America,California,Southern Africa,and subtropical Asia. The vast majority of Eleocharis species grow in aquatic or mesic habitats from sea level to higher than 5,000 meters in elevation.
Goeppertia allouia,known as lerén or lairén in Spanish,and also known in English as Guinea arrowroot,and sweet corn root,is a plant in the arrowroot family,native to northern South America and the Caribbean,The name "allouia" is derived from the Carib name for the plant Lerén is a minor food crop in the American tropics,but was one of the earliest plants domesticated by pre-historic Amerindians in South America.
Bamboo shoots or bamboo sprouts are the edible shoots of many bamboo species including Bambusa vulgaris and Phyllostachys edulis. They are used as vegetables in numerous Asian dishes and broths. They are sold in various processed shapes and are available in fresh,dried,and canned versions.
A staple food,food staple,or simply staple,is a food that is eaten often and in such quantities that it constitutes a dominant portion of a standard diet for an individual or a population group,supplying a large fraction of energy needs and generally forming a significant proportion of the intake of other nutrients as well. For humans,a staple food of a specific society may be eaten as often as every day or every meal,and most people live on a diet based on just a small variety of food staples. Specific staples vary from place to place,but typically are inexpensive or readily available foods that supply one or more of the macronutrients and micronutrients needed for survival and health:carbohydrates,proteins,fats,minerals,and vitamins. Typical examples include grains,seeds,nuts and root vegetables. Among them,cereals,legumes and tubers account for about 90% of the world's food calorie intake.