Chinese name: Shui onion

Latin name: Schoenoplectus tabernaemontani (Gmel.) Palla

Aliases: Wan, Fu Li, Wan Pu, Fu Li, Scallion Pu, Wancao, Puping, Shuizhang Scallion, Cupola

Species: Scallion

Distribution area: China, North Korea, Japan, Australia, North and South America, Vietnam

1. The shape of water onion

The root of water onion is prostrate, and the stem veins are thick, there are many fibrous roots, and the culm is relatively tall and cylindrical, with a height of one to two meters. Very smooth, with three to four leaf sheaths at the root, 38 cm in length, tubular and membranous. The leaves are linear, ranging from 1.5 cm to 11 cm in length. There is a bract, an extension of the culm, erect, subulate, usually shorter than the inflorescence. Inflorescences solitary or regenerated, with four thirteen radiating branches. The radiating branches are five centimeters in length, raised on one side and concave on the other, with serrated edges. Spikelets solitary or in clusters of two or three on top of radiating branches, ovate or oblong, apex very acute or obtuse, 5 to 10 mm in length and 2 to 3.5 mm in width .

2. Habits of Scallions

Scallions are produced in Northeast China, Inner Mongolia, Shanxi, Shaanxi, Gansu, Xinjiang, Hebei, Jiangsu, Guizhou, Sichuan, Yunnan; also distributed In Korea, Japan, Australia, North and South America. Scallions usually grow in lakes, water, shallow ponds, swamps, or wetland grasses. The optimal growth temperature is 15 to 30 °C, and the growth is stopped below 10 °C. It is resistant to low temperature and can overwinter in the open field in most parts of the north. It likes a drier air environment, and the rainy days are too long, which is easy to be infected by bacteria. Afraid of rain, keep the leaves dry at night.

3. Cultivation of water onions

The cultivation of water onions can be propagated by sowing, usually indoor sowing in March and April, and the cultivation soil is leveled on the pot Compact, sprinkle seeds on it, sieve a layer of fine soil to cover the seeds, and submerge the pot in shallow water, so that the pot soil is always moist. The room temperature is controlled at 20 ~ 25 ℃, and it can germinate and take root in about 20 days. Sowing and seedling water onion avoid continuous cropping. After harvesting before the suitable sowing date in February, the field is deeply plowed and whitened, and the dark side is finely divided and leveled after applying enough basal fertilizer. About 3 to 5 kilograms of seeds are needed per acre of seedling land, and the bred seedlings can be planted in 5 to 10 acres. The germination temperature of water onion seeds is about 18°C the fastest, and the seedlings emerge 5 to 6 days after sowing.

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