What to do when rice suffers from flood? how to manage rice well after flood?

After rice suffers from flood, it is necessary to remove stagnant water in time, help seedlings and wash seedlings, strengthen field management, apply quick-acting fertilizer and spray to prevent diseases and insect pests, promote the normal growth of rice seedlings, and reduce the disaster loss of rice to a minimum.

Rice management

(1) remove stagnant water as soon as possible. After the waterlogging, quickly organize manpower, centralized drainage equipment, drainage rescue. First discharge the high field, let the rice leaf tip come out of the water as soon as possible, reduce the flooded days of rice and reduce the loss. Drainage should be noted that under the hot sun, the rice field water can not be drained at one time, and the appropriate amount of water can be reserved for rice needs. If the field water is drained at one time, the rice is easy to wither and aggravate the loss. In cloudy and rainy days, the field water can be drained at one time, which is beneficial to the recovery of rice.

(2) strengthen field management. First, by digging drainage ditches around rice fields (especially low-lying fields), the root system of flooded rice can resume growth as soon as possible. In cloudy days, the stagnant water in the whole field can be drained at one time, but under high temperature and strong light, the stagnant water in the field should be eliminated step by step, and the proper water layer should be retained, preferably in the evening, which is beneficial to the recovery of rice growth. If it is drained at one time, because the rice is immersed in water for a long time, its vitality is weak, the stems and leaves are soft, and it is easy to wither and aggravate the loss in case of sunny day. The dry-wet-wet irrigation method is used to maintain the water demand of rice and ensure the aeration of the soil. For late-sowing and late-maturing rice fields, we should continue to open and sun up the fields, and control the ineffective division; for the rice fields that have entered the booting and heading stage, maintain the shallow water layer to keep the fetus and protect the panicle, and use the method of alternating dry and wet irrigation to avoid cutting off water too early so as to improve the seed setting rate and 1000-grain weight of rice.

Second, when the water recedes, the floating objects are removed by waterlogging. Pick up the fallen rice plants one by one. Clear the sludge from the leaves to restore photosynthesis and respiration of rice as soon as possible.

Third, for paddy fields that have just come out of water, it is necessary to open ditches and open fields, combined with irrigation of shallow water and topdressing fertilizer. After the rice is flooded, the roots, leaves and tillers need to restore growth, it is necessary to supplement a large number of nutrients and minerals, coupled with the loss of fertilizer in the affected paddy fields, so topdressing should be fast and the amount should be sufficient to promote the recovery of rice growth as soon as possible. Fertilization is mainly available fertilizer, and different fertilization methods, different types and amounts of fertilizer are used according to the different growth stages of rice. At 20% of rice heading, 0.5-1 g "920" per mu can be sprayed to promote heading tidiness; in order to improve the seed setting rate and 1000-grain weight of rice, 50-100 kg 0.2% potassium dihydrogen phosphate solution can be sprayed per mu every 5-7 days for 2-3 times. For the paddy fields flooded at the booting stage, it is appropriate to spray foliar fertilizer after drainage. 150 grams of potassium dihydrogen phosphate and 250 grams of urea and 50-60 kilograms of water per mu can be used for extra-root topdressing to increase 1000-grain weight.

(3) Comprehensive control of diseases and insect pests. After the rice field was flooded, the rice plant was anoxic and the acetylation of rice body increased. At the same time, the rice body was damaged and there were more withered leaves during the flooding period. At this time, rice was vulnerable to diseases and pests such as sheath blight, rice blast, bacterial leaf blight, rice planthopper, rice leaf roller and so on. Therefore, we should pay attention to the prevention and control of the above diseases and insect pests, reduce the diseases and insect pests caused by floods as far as possible, and reduce the losses of rice to a minimum.

(4) replanting and replanting at the same time. Fields that have lost harvest due to flood and waterlogging disasters should be replanted and replanted in time to ensure multiple harvests and make up for disaster losses. For the drowned middle and late rice fields, we should actively organize seedlings to replant rice, and pay close attention to the work of turning early rice into autumn and expand the planting of rice as far as possible. Early rice turning into autumn can be done by planting and direct seeding. It is best to choose early-maturing or early-maturing rice varieties for autumn. Planting and turning autumn rush to accelerate sprouting and sowing before July 5, the seedling age should be controlled at 15-18 days, and the seedlings should be closely planted, shallow and evenly planted, with 25-300000 basic seedlings per mu. Live broadcast in autumn, open the whole field before July 10, soak seeds in warm water, sow seeds with broken breasts, and guarantee basic seedlings of 300000 per mu. When the season is tight, sweet potatoes, soybeans, peanuts and vegetables can be replanted. It is necessary to increase planting density and strengthen fertilizer and water management.