What matters should be paid attention to when applying fertilizer to rice?

What matters should be paid attention to when applying fertilizer to rice? Please introduce that the principle of fertilization for rice should be organic fertilizer and phosphate fertilizer as base fertilizer, potassium fertilizer as tiller fertilizer, nitrogen fertilizer applied evenly for many times, pay special attention to strong bud and strong seed fertilizer, attack large panicle and big grain at the same time. (1) the base fertilizer is mainly organic fertilizer. According to the determination, 50% of the total fertilizer absorption of rice comes from the soil, 60% of the nitrogen and 70% of the phosphorus and potassium come from the soil. Insufficient fertilization will consume too much soil potential nutrients and reduce soil fertility. Increasing the application of organic fertilizer is an important way to maintain and improve soil fertility. Therefore, rice production should emphasize the accumulation of soil and miscellaneous fertilizers, the development of aquaculture more fence fertilizer, a variety of green manure, the promotion of spike harvesting and the return of rice straw to the field, so that the application of organic fertilizer accounts for 40% of the fertilizer application in the whole period. (2) due to the strong root activity of rice, new roots occur quickly after planting. Generally, urea and other fertilizer can be applied to promote tillering 5 days after planting in early rice and 3 days after planting in late rice, and tillering fertilizer should be applied in stages. Apply urea 6-7.5 kg per mu for the first time Every 7 days or so, according to the seedling situation, the second tiller fertilizer should be applied less than 4 kg urea per mu, and 5-7.5 kg potash fertilizer per mu should be applied to the fields with little organic fertilizer and lack of potash fertilizer. (3) panicle fertilizer for seedling application can be divided into flower promotion fertilizer and flower protection fertilizer due to different application period and function. If the early stage fertilization is appropriate and the growth of grain seedlings is balanced, only flower protection fertilizer should be applied and the application rate should not be too much, generally about 2.5 kg of urea per mu. If the early stage fertilization is insufficient, the number of population seedlings is small, and the individual growth efficiency is poor, then both flower promotion fertilizer and flower protection fertilizer can be applied, and urea can be applied 5 kg per mu. Rice has a great demand for potash fertilizer. After rewatering the field, combined with topdressing nitrogen fertilizer, about 2.5 kg potash fertilizer per mu can significantly increase the yield. (4) when grain fertilizer and foliar topdressing were applied to seedlings with light leaf color before heading, 2-2.5 kg urea per mu and 2.5 kg urea per mu and normal growth hybrid rice should only be used as grain fertilizer when urea was sprayed with 50 kg urea and 50 kg water. Due to the higher absorption of phosphorus and potassium by rice in the later stage, the application of foliar fertilizer in the later stage can increase the yield. Spraying 150-200 kg of potassium dihydrogen phosphate with 50 kg of water 4-6 days before heading or 2-3 days of full heading could enhance the resistance of plants to high temperature or low temperature. Click to get more rice planting techniques click to get more food crop planting techniques