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水稻中后期叶面施肥,是根据水稻从营养生长转入生殖生长既要肥又不能过头的生理特性,采用根外喷施方法,适量合理地供给水稻生长发育对养分的需要,积极为水稻保穗、增粒、争粒重,提高结实率创造良好的养营条件,从而使水稻获得高产。实践证明,不论是一类苗、二类苗还是三类苗,肥田还是瘦田,坑田还是塅田,早稻还是晚稻,中后期进行叶面施肥,都有不同程度的增产效果。笔者自1978年二季晚稻开始,就水稻中后期叶面施肥与产量的关系,系统调查了210余亩典型田块并进行了小面积的验证试验.其中
The middle and late rice foliar fertilization is based on the rice from vegetative growth to reproductive growth both fat and not overly physiological characteristics, the use of root spraying method, the amount of reasonable supply of rice growth and development of nutrients, and actively for rice Spike, grain, grain weight competition, improve seed setting rate to create good conditions for farming, so that rice yield. Practice has proved that, whether it is a class of seedlings, seedlings or two types of three seedlings, fertilizer field or thin field, pit or field, early or late rice, leaf fertilizer in the late, have different levels of yield. Since late rice in the second semester of 1978, the author has systematically investigated more than 210 acres of typical plots and conducted small area validation tests on the relationship between foliar fertilization and grain yield in the late rice stage.