How to fertilize hybrid rice?

How to fertilize hybrid rice? It should be noted that the fertilization of hybrid rice is indeed different from that of other crops. Generally speaking, organic fertilizer and phosphate fertilizer should be used as base fertilizer, potassium fertilizer should be mainly used as tiller fertilizer, nitrogen fertilizer should be applied evenly for many times, and special attention should be paid to strong bud and strong seed fertilizer. We should pay attention to the following points: (1) the application of base fertilizer. According to the determination, 50% to 60% of the nitrogen and 70% of the phosphorus and potassium in the total fertilizer absorption of hybrid rice 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. The application rate of organic fertilizer accounts for 40% of the total amount of fertilizer applied in the whole period. (2) appropriate amount of early application of tiller fertilizer. Due to the strong root activity of hybrid rice and the rapid occurrence of new roots after planting, urea can be applied 5 days after planting in early rice and 3 days after planting in late rice, and the tiller fertilizer should be applied in stages, the first application of urea is 6-7.5 kg per mu. According to the seedling condition, the second tiller fertilizer should be applied less than 4 kg per mu according to the seedling condition. The fields with little organic fertilizer and lack of potassium fertilizer should be topdressing 5-7.5 kg potash fertilizer per mu. (3) the application of panicle fertilizer to seedlings. Panicle fertilizer can be divided into flower-promoting fertilizer and flower-protecting fertilizer according to different application period and function. Where the early stage fertilization is appropriate, the growth of grain seedlings is balanced, generally should focus on flower protection and grain increase, only flower protection fertilizer should be applied and the application amount 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. Hybrid 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) the application of grain fertilizer and foliar topdressing before the beginning of panicle. If the leaf color of the seedlings is too light, apply urea 2-2.5 kg per mu; in fields that fall yellow prematurely after heading, 2.5-3 kg urea per mu; for hybrid rice with normal growth, only 500-750 kg urea and 50 kg water should be sprayed as grain fertilizer. Because the amount of phosphorus and potassium absorbed by hybrid rice is higher in the later stage, the application of foliar fertilizer in the later stage has a good effect on increasing yield. Spraying 150-200 kg potassium dihydrogen phosphate with 50 kg water at 4-6 days before heading or 2-3 days after heading could enhance the resistance of plants to high temperature or low temperature. Click to get massive rice planting technology click to get massive grain planting technology