How to fertilize hybrid rice scientifically?

How to fertilize hybrid rice scientifically? The fertilization principle of hybrid rice should be organic fertilizer and phosphorus 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 large grain at the same time. (1) the base fertilizer is mainly organic fertilizer. According to the determination, 50% of the total fertilizer absorption of hybrid rice comes from soil, 60% of nitrogen and 70% of phosphorus and potassium come from 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, the production of hybrid rice should emphasize the accumulation of soil and miscellaneous fertilizers, the development of aquaculture, the application of more fence manure and a variety of green manure, and the promotion of spike harvesting and rice straw returning to the field, so that the application of organic fertilizer accounts for 40% of the total amount of fertilizer applied in the whole period. (2) due to the strong root activity of hybrid rice, new roots occur quickly after planting. Generally, urea can be applied 5 days after planting in early rice and 3 days after planting in late rice, and tiller fertilizer should be applied in stages. Urea is applied 6-7.5 kg per mu for the first time. Every 7 days or so, according to the situation of seedlings, the second tiller fertilizer should be applied to the fields with poor growth, less than 4 kg of urea per mu, and 5-7.5 kg of potash fertilizer per mu for the fields with little organic fertilizer and potassium deficiency. (3) panicle fertilizer for seedling application can be divided into flower promotion fertilizer and flower protection fertilizer due 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) for hybrid rice with normal growth, when grain fertilizer and foliar topdressing are applied to seedlings with light leaf color, 2-2.5 kg urea per mu and 2.5 kg urea per mu and 2.5 kg urea per mu and 50 kg water spray is suitable for hybrid rice with normal growth. 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 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 massive rice planting technology click to get massive grain planting technology