2. Apply sufficient base fertilizer: Water chestnut requires a relatively concentrated amount of fertilizer. Before planting, 2, kilograms of pig manure or decomposed mud manure can be applied per mu, and 5 kilograms of urea can be applied as a quick-acting fertilizer per mu after germination. After flowering, it can be sprayed on the leaves in two or three times in combination with 2 to 3 packs of powerful yield-increasing agents for disease control and insect control or 2% potassium dihydrogen phosphate.
3. Transplanting and field planting: Water chestnut should be planted on the day of seedling emergence. Generally, the row spacing of water chestnut is 1.5 ~ 2m, and the hole spacing is 1.5 ~ 2m. Each hole is planted with 2 ~ 3 plants, and the row spacing of water chestnut is 2.5 ~ 3m, and the hole spacing is 2 ~ 2.5m. Each hole is planted with 8 ~ 1 plants.
4. Weeding in time: There are many kinds of aquatic weeds in the water chestnut pond, such as Banping grass, Pteris vittata grass, bryophyte grass, etc., which must be removed manually in time, otherwise the photosynthesis of water chestnut will be affected. Generally, weeds are removed every 1 days after transplanting until the water chestnut is covered.
5. pest control: common pests of water chestnut include aphids, leafhoppers, etc., which can be controlled by trichlorfon or diphacinone mixed with water spray at the initial stage of damage. The common disease is mainly water blast, which can be controlled by jinggangmycin and carbendazim mixed with water spray at the initial stage of disease.
6. timely picking: water chestnut ripens 2-3 days after flowering, and is harvested when the sepals fall off and the pericarp is not fully hardened when it is used as a vegetable or eaten raw, and it is harvested when it is fully mature when it is cooked, eaten, processed or reserved. Early-maturing varieties are picked every 5 days, and late-maturing varieties are picked once every 7 days.