Creeping rhizomes are slender. Most of the culms are tufted, straight, slender, cylindrical, 40- 100 cm high, 2-3 mm in diameter, gray-green, smooth, hairless, with diaphragm, and there are many longitudinal joints on the surface of the back culms. There are only 2-3 leaf sheaths at the base of the stem; Sheath is light brown, smooth, hairless, membranous, clasping stems, with oblique sheath mouth and sharp tip, 7- 15 cm long.
Domestication and cultivation of water chestnut was relatively late, and the earliest cultivation of water chestnut was found in ancient books between the Song Dynasty. Water chestnut has strong growth adaptability. Abroad, water chestnut is mainly distributed in low-lying areas such as ponds and beaches in Southeast Asia, America, Europe and Oceania.
Water chestnut distributed in western countries was introduced in the 0/7th century. In China, it is distributed in almost all provinces and regions of the country except the alpine region.
growing environment
Water chestnut likes to be warm and humid, and it is not resistant to frost. It usually grows in shallow water. Water chestnut needs high temperature and long sunshine in the early growth stage, such as the optimum temperature for germination is 15-20℃ and the optimum temperature for tillering is 25-30℃.
In the late growth stage, shortening the illumination time (less than 13 hours) can promote bulb formation, and lower temperature (20-25℃) is also beneficial to bulb expansion. The soil is sandy loam or humus, with shallow soil layer and pH value of 6-7.