为夺取杂交晚稻高产,在田间管理上要抓好以下要点:1.合理施用“保花肥”和防止后期脱肥早衰杂交晚稻施用“保花肥”能满足孕穗期对养分的需要,促使穗大、穗重。施肥时间:应以主茎剑叶刚露尖但尚未见穗时为宜。此时施用“保花肥”,不会引起稻苗贪青和倒伏,可提高叶片叶绿素含量,增强光合作用,从而满足幼穗发育的需要,防止颖花退化。“保花肥”约占总施肥量的20%左右,一般每亩施氮、磷、钾复合肥8～10公斤或尿素2～3公斤、过磷酸钙8～10公斤、氯化钾3～5公斤;稻苗长势差的田块,每亩加施尿素1.5～2公斤;稻苗长势好的田块应适当减少施肥量。施用“保花肥”一般可增产10～15%。杂交晚稻生长后期,气温渐低,肥料分 In order to seize the high yield of late hybrid rice, we should pay attention to the following points in field management: 1. Applying “Baohua fertilizer” rationally and preventing post-fertilization premature premature hybridization The application of “Baohua fertilizer” in late rice can meet the needs of nutrient at booting stage, Ear weight. Fertilization time: should be the main stems and leaves just exposed tip but not yet see the appropriate spike. At this moment, the application of “Bao Hua Fei” will not cause the greeding and lodging of the rice seedlings, but also increase the content of chlorophyll in the leaves and enhance the photosynthesis so as to meet the needs of young spike development and prevent the spikelets from degeneration. “Paul fertilizer” accounts for about 20% of the total amount of fertilizer, the general per acre nitrogen, phosphorus and potassium compound fertilizer 8 to 10 kg of urea or 2 to 3 kg of superphosphate 8 to 10 kg of potassium chloride 3 to 5 Kg; rice seedling poor plots, plus 1.5 to 2 kg of urea per acre; rice growing good plots should be appropriate to reduce the amount of fertilizer. Application of “Paul fertilizer” can generally increase 10 to 15%. Late hybrid rice late growth, the temperature is getting lower, fertilizer points