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根据各地试验情况,杂交水稻施保花肥一般可增产10%以上,特别是稻株长势较差的(?)块,增产效果更显著,可达20%以上。经考种结果,追施保花肥的比不施的株高增加1.2—3.4厘米,包颈率降低9.7—19.2%,千粒重增加0.39—0.85克,空秕率下降3.6%—5.8%。杂交水稻追施保花肥的增产效果之所以显著,主要原因是:(1)杂交水稻营养生长旺盛,根系发达,吸肥能力强,后期容易脱肥,若能及时追施保花肥,便可保障后期供肥,防
According to the test situation in different places, the fertility of hybrid rice Shihua can generally increase the yield by more than 10%, especially the poorly growing rice (?) Block, and the yield increase effect is more remarkable, up to 20%. The test results, topdressing fertilizer than the non-applied plant height increased by 1.2-3.4 cm, reducing the neck rate of 9.7-19.2%, the increase of 1000 grain weight 0.39-0.85 grams, empty rate decreased by 3.6% -5.8%. The main reason for the increased yield of hybrid rice topdressing fertilization is as follows: (1) The hybrid rice has strong vegetative growth, developed root system, strong absorption capacity, and is easy to take off afterwards. Late for fertilizer, anti