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增施肥料是当前世界各国提高水稻产量的一项重要技术措施。日本是化肥施用量较多的国家之一。如何提高稻田化肥施用效果,目前仍然是世界稻作实践上一项重要的研究课题。近年来,日本稻田施肥技术上,主要有两种方法。一种是V字理论稻作法,另一种就是本文概述的深层追肥稻作法。两种方法虽是在具体最适追肥期上互相矛盾,但彼此均具有一套围绕着施肥方法为中心的栽培理论与实践,因而两者均获得1O-20％、个别达30％的增产效果。目前,这两种施肥法在日本主要稻产
Fertilizer application is an important technical measure for increasing the output of rice in various countries in the world. Japan is one of the countries with more chemical fertilizer. How to improve the effect of fertilizer application in paddy fields is still an important research topic in rice practice in the world at present. In recent years, Japanese rice fertilization technology, there are two main ways. One is the V-theory of rice practices, the other is the depth of this article outlined the method of top-dressing paddy. Although the two methods contradict each other in the specific optimal fertilization period, they both have a set of cultivation theories and practices centering on the fertilization method, and both of them achieve 10-20% and 30% of yield increase individually . At present, these two kinds of fertilization method in Japan’s major rice production