The season when rice is suitable for planting is also the period with the most concentrated rainfall. Therefore, the impact of flooding on rice production occurs year after year, and the hazardous areas are mostly concentrated in high-yield rice fields with fertile paddy soils on both sides of the river and around the lake. According to the spatial and temporal characteristics and intensity of floods, the adoption of targeted rice cultivation techniques for flood resistance is an important part of flood control and disaster relief, and it is also an important measure to ensure the stable and high yield of grain. The low-lying areas to avoid cultivation in the double-season rice area, the frequency of the most concentrated floods occurred mainly in the middle and late stage of early rice and late rice seedling stage, low-lying rice fields are most vulnerable to flooding. For these poorly stabilized rice areas, the short growing period can be avoided. For example, planting very early-maturing early-season rice varieties, adopting greenhouse sheds for cold-resistance and early rice early-maturing early-maturing cultivation, spraying mature foliar seeds during the ripening stage, and spraying ethylene-promoting crops during the ripening stage to promote ripe harvesting, and strive to mature and harvest around June 30. To avoid the floods in mid-July in July. After harvesting early rice, if there is no flood and waterlogging, planting a late rice variety (combination) with a long growth period and high yield. If floods occur in the first half of July, early harvested early rice varieties harvested after the disaster will be planted in autumn. Anti-mite cultivation and cultivation of many old and strong can resist maggot resistance. Putian or dry nursery seedbeds must be re-applied to farmyard basal fertilizer to meet the growth requirements of the hawksbill. Generally, 500 to 750 kilograms of excrement and 1,000 to 1,500 kilograms of pig manure are used to perish in per an acre field. After germination, the sprouts are exposed to cold water for 2 to 3 hours in cold water and then placed in hot water at 40 to 50°C for 20 to 30 minutes. Alternating stress is performed 2 or 3 times to induce seedling resistance. When seedlings are used, dilute sowing and dry cultivation are used to add uniconazole, which promotes the formation of multiple pods. The deep muddy paddy field is best to choose two stages of seedlings, which uses multiple seedlings (five-year-old 5.5-6.5 leaves) to cultivate and shorten the time of field delivery. Rational fertilization can not only promote the formation of high-yield population structure in rice, but also enhance the resistance of rice plants. In the cultivation of high-yield rice, the main points of application of fertilizers are: 2000 to 2500 kilograms of beef manure per acre. In flood-resistant cultivation, nitrogen, phosphorus, potassium, zinc, and selenium fertilizers all have a good effect on enhancing the rice resistance to alfalfa, and the interaction effects are significant. The principle of total fertilization is to reapply basal fertilizer and apply early tillering fertilizer; apply nitrogen fertilizer, increase potassium fertilizer, supplement silicon and calcium fertilizer, and selectively apply zinc fertilizer. The normal non-hazardous paddy field yields 400 kg as the standard. Generally, the amount of pure nitrogen in Daejeon should be 8.5 to 10 kg (urea 18.5 to 21.5 kg) and pure potassium 6.5 to 8 kg (equivalent to 12.5 to 15.5 kg of potassium chloride). Between 1 and 1.2. The ratio of basal fertilizer, topdressing fertilizer and granule fertilizer is about 5:4:1. Phosphorus fertilizer has the effects of promoting the tillering of rice plants, reducing the activity of peroxidase, enhancing the stability of cell membranes under adverse conditions, and increasing the rate of spike formation. The most suitable amount for superphosphate is about 50 kilograms per acre. Zinc fertilizer is generally 1 to 2 kg of sulphate per gram of heptahydrate. Silicon and calcium fertilizers can generally increase the disease resistance and lodging resistance of rice. In flood resistant cultivation, the application amount is generally 10-20 kg per mus of soluble silica. After flooding, the application of micro-fertilizer and quick-acting nitrogen, phosphorus and potash fertilizers will help restore rice's vitality, increase tillering, and increase seed-setting rate and grain plumpness. In general, the flooded rice seedlings before the flooding stage applied 3-5 kg ​​of urea per mu, and 3 to 5 kg of potassium chloride; the rice seedlings after the booting stage usually applied 1-3 kg of urea and 1 to 2 kg of potassium chloride. Potassium dihydrogen phosphate 0.5 to 1 kg. After rice is flooded, chlorine control agents, membrane stabilizers, active oxygen scavengers, and cytokines and other chemical controlling agents (anti-mite agents) can be used to regulate or alleviate the adverse effects of drowning on rice. Whether it is sprayed before or after drowning, the anti-spasmodic agent (Dodley) has a good effect on improving the ability of rice to withstand drowning.
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