由于春季雨水多，水稻田露晒往往达不到理想的效果，早稻中期生长常常呈旺盛状态，难于转赤，此时刚好是幼穗分化时期，在生产实践中应否施肥一直是个不明确的问题。下面我们从两方面来研究早稻中期是否有必要施肥。１试验方法我们“七五”期间就开始对水稻中期穗肥问题进行了 Due to the large amount of rain in the spring, the sun exposure in paddy fields often fails to achieve the desired effect. The mid-term growth of early rice tends to be exuberant and difficult to turn red. In this case, it is just the stage of spike differentiation. It is always unclear whether fertilizer should be applied in production practice problem. Below we study from two aspects whether it is necessary to fertilize the middle of early rice. 1 Test Methods During the “Seventh Five-year Plan”, we started to carry out the problem of mid-panicle panicle fertilization in rice