水稻本田施氮还是前重后轻好,其重点应放在底氮肥的施用上,这里所说的前重,即增加底氮肥用量,改进底氮肥施用方法,所说的后轻,即减少追氮肥用量和追肥次数。一、前重后轻施氮法的依据 1.多次追肥法存在肥料利用效果低的弊端。以往人们在谈论水稻施氮的问题上,总是把注意力过多地放在追肥上,表现是:①和底氮肥相比,追肥用量偏大。②过多强调追 Rice Honda nitrogen or heavy before and after the light, its focus should be placed on the application of nitrogen at the end, said here before the heavy, that is, to increase the amount of nitrogen at the end of nitrogen to improve the application of nitrogen at the end of the method, said after the light, that is, to reduce chase Nitrogen fertilizer and fertilizer the number of times. First, the basis of light heavy nitrogen method 1. Multiple dressing methods have the drawbacks of low fertilizer use. In the past people talked about the issue of nitrogen in rice, always put too much attention on the top-dressing, the performance is: ① compared with the bottom of nitrogen fertilizer, fertilizer is too large. ② too much emphasis on chasing