What is onion? It is an aquatic plant and an important cash crop in China.

Allium fistulosum is an aquatic plant and an important cash crop in China. It belongs to Cyperaceae. It looks like edible green onion, but it is inedible. Its plant height is between half 1.5 m -2 m, and it often grows in swamps, ditches, Chi Pan and shallow waters around lakes. The aboveground parts of plants can be used as medicine, harvested in summer and autumn, washed, cut into sections and dried in the sun, which has the function of diuresis and detumescence, and can also be used as background materials for waterscape gardens, and also as materials for papermaking or weaving straw mats and straw bags.

The main value of water onion:

1, ornamental value

In waterscape gardens, onions are mainly used as background materials; Its stems can be used as thread material for flower arrangement, and flower friends in some areas will also make water onions into potted plants and watch them at home.

2. Economic value

Scallion can be used to make paper. In Yunnan, scallion is often used to weave straw mats and bales.

3. Ecological value

It has a high removal rate of organic matter, ammonia nitrogen, phosphate and heavy metals in sewage, and can be used as a purification plant for water sources.