In terms of water management, it is necessary to fully dredge irrigation and drainage ditches, strengthen field ditch drainage, ensure the rapid drainage of waterlogging in the field after rain, promote root growth, inhibit excessive growth of stems and leaves, and control ineffective tillers through timely exposure. The field should be kept in shallow water at booting stage and heading stage, and dry and wet alternate at the later stage to avoid premature water shortage and high temperature ripening, which will affect the yield and rice quality. For paddy fields flooded by rainstorm, we should pay attention to timely ditch cleaning and drainage, dredge ditches, remove silt and debris, and wash seedlings to help them reduce the time of rice flooding. The field that is flooded too deeply has insufficient seedlings and is still in the tillering stage. Where there is water source, open space can drain water; If there is no water supply, it is necessary to lower the water level, adhere to wet irrigation, improve the physical and chemical properties of soil, remove toxic substances, enhance root activity, accelerate seedling growth and promote tillering.

Tillers should be stubble in shallow water at jointing stage, stubble in shallow water after drying and rehydration at middle booting stage, and stubble in 3 cm water layer at heading and flowering stage to prevent the harm of high temperature and drought. Alternating dry and wet irrigation can promote grain filling. Shallow water irrigation should be carried out after milk ripening and kept moist when yellow ripening. For fields planted late, if the number of seedlings is insufficient and tillering fertilizer is not applied, 5 ~ 8 kg of urea should be applied in time to promote tillering; After topdressing tillering fertilizer, 0.5% potassium dihydrogen phosphate or plant ash can be sprayed on the leaves in the field to promote growth; For those that have been discharged into the nectar field, jointing and fertilizing should be carried out as soon as possible after rehydration, and 7 kg urea and 4 kg potassium chloride should be applied per mu to promote flower growth, so as to increase the total spikelets of the population and strive for large ears. The rainy weather at heading stage has a great influence on the flowering, fertilization and seed setting of rice, which is mainly manifested in the fact that heavy rain will break the anther and aggravate the spikelet degradation, which will affect the normal pollination of rice, especially the heavy rain at the flowering stage of rice, which is not conducive to the fertilization of spikelets, thus forming empty grains and affecting the seed setting rate of rice.

Different rice varieties have different planting densities. The seeds for direct seeding of hybrid rice are generally 2.5 ~ 3 kg/mu. If it is transplanting, try to cultivate strong seedlings, appropriately reduce the transplanting density and improve the microclimate of the group. Some rice is more tolerant to chemical fertilizers, and some rice should apply more potassium fertilizer and less urea. Adding silicon, zinc and calcium fertilizer is beneficial to lodging resistance and disease resistance, and improves the adaptability to climate and environment. Due to the decrease of seed setting rate, there are more photosynthetic products in plant stems, so part of urea can be supplemented in time 3~7 days after full heading of rice to increase the supply of "source" and achieve the purpose of strengthening stems and seeds. It is suitable to preserve ratooning rice varieties, and it is also beneficial to the germination of ratooning axillary buds, so that the yield loss can be compensated by ratooning rice.