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水稻施肥与结实率和空壳率的关系已有许多研究,我国农民在长期生产实践中积累了更丰富的经验。由于水稻整个生长期中缺肥而造成的空壳,应广辟肥源,增施肥料。当肥料较为充足时,应注意合理施肥,提高有效穗数、结实率,增加粒重,夺取高产。要使水稻总粒数增加而结实率不致下降,必须考虑施肥时期和施用方法。水稻生长后期是提高结实率,减少空壳的重要时期。自抽穗到结实阶段,需要大量养分。一般情况下,1/3是靠抽穗前叶鞘内贮存的养分供给结实所需,而2/3是靠抽
There have been many studies on the relationship between fertilization, seed setting rate and shell percentage. Farmers in China have accumulated a wealth of experience in long-term production practices. Due to lack of fat throughout the growing season of rice shell, should be a new source of fertilizers, fertilizers. When the fertilizer is more adequate, we should pay attention to rational fertilization, increase the effective panicle number, seed setting rate, increase grain weight, to seize high yield. To increase the total grain number of rice without reducing the rate of seed set, we must consider the fertilization period and application methods. Late rice growth is an important period to increase the seed setting rate and reduce the shell size. From heading to fruiting stage, requires a lot of nutrients. Under normal circumstances, 1/3 is required by the nutrients stored in the leaf sheath before heading strong, and 2/3 by pumping