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农业化学的根本任务就是探讨对农作物最有效和最合理的施肥技术。这项任务涉及到很多问题,如肥料类型及施用量、施肥时期和施肥方法等等,都应达到最佳水平。本文只讨论氮、磷、钾的最适宜施用量问题。 下面叙述的测定方法,是以测定两个要素(不管所要研究的元素数量多少)的最适施用量来代替测定三种或三种以上要素的最适施用量。这样既能保证田间试验省工,又能提高试验精确度和得到最佳施肥量的最大近似值。
The fundamental task of agrochemicals is to explore the most effective and rational fertilization techniques for crops. This task involves many issues, such as the type and amount of fertilizer, fertilization period and fertilization methods, etc., should be to achieve the best level. This article discusses only the most appropriate nitrogen, phosphorus and potassium application rate. The measurement method described below is based on the determination of the optimum application amount of two elements (regardless of the number of elements to be studied) instead of the optimum application amount of three or more elements. This will not only ensure field test labors, but also improve the test accuracy and get the best approximation of the amount of fertilizer.