Water chestnut is an aquatic plant, so when choosing the planting site, it should be as close to the water source as possible. At the same time, water chestnut is a light-loving plant, so it is best to choose a sunny place, such as a pond or lake with more organic matter in the soil and sufficient nutrients for irrigation and drainage. The depth of silt in the water should not be less than 20 cm. When preparing soil, clean up the excess silt in the pond, clean up the weeds in the pond, and sprinkle a proper amount of farmyard manure before planting.

In order to make water chestnut yield high, it is necessary to sow in time. Because there are several planting methods of water chestnut, we need to determine the planting time according to the specific planting methods. Secondly, we need to consider the climate and temperature of the planting area. The normal planting time of water chestnut is generally around the beginning of March every year, but if it is planted in greenhouse technology, it can be planted in1February every year.

At present, the most commonly used propagation method of water chestnut is ramet propagation, that is, the roots of water chestnut with developed roots are selected for planting. When planting, each row should be about 1.5 to 2 meters, and each plant should be about 1 meter, because it has strong branching ability and will soon grow very densely. About a week after planting, we should check the growth of water chestnut in the field. If seedlings are missing in the letter, they should be replenished in time to ensure that the seedlings in the field are neat.

The most important thing in field management is actually the regulation of water level and the management of water quality, followed by fertilization and weeding. After planting water chestnut, it is best to control the water level in the field at about 25 cm, and then slowly raise the water level with the growth of water chestnut, but the water depth in the field should not exceed two meters at most. Secondly, water needs to be changed at ordinary times, otherwise it will cause many unnecessary diseases. Then, when the water chestnut takes root, we can use urea or manure according to its growth, and then topdressing phosphate fertilizer and potash fertilizer when the water chestnut blooms and bears fruit. It is best to get rid of weeds before they grow, otherwise it will be difficult to weed water chestnut when it grows up.

The most common pests and diseases of water chestnut are white silk disease and fireflies. There are many primary causes of white silk disease, such as excessive weeds, biased application of nitrogen fertilizer, too low or too deep water level, etc. , may cause white silk disease. Then carbendazim can be used for prevention and control, at the same time, appropriate amount of nitrogen fertilizer can be used, weeds can be eliminated in time, and water level can be controlled scientifically. The firefly beetle mainly harms water chestnut, thus affecting the fruit yield of water chestnut, which can usually be controlled by dimethoate milk.