为了合理施用氮肥,提高氮肥效果,使有限的肥料发挥最大的增产效果。根据我省1975～1976年肥料网上有关试验,谈以下三个问题。一、不同地区氮肥用量及其肥效的关系我省农业生产条件差异很大。气候、土壤、地力水平、作物布局以及栽培条件不同,影响着氮肥的效果。从大的农业区来看,1975～1976年试验结果,以汉中盆地稻麦两熟区的氮肥效果最高,每斤氮素平均 In order to rational use of nitrogen fertilizer, nitrogen fertilizer to enhance the effect of limited fertilizer to maximize production. According to our province from 1975 to 1976 fertilizer online test, the following three questions. First, the relationship between the amount of nitrogen and fertilizer efficiency in different regions of our province agricultural production conditions vary widely. Climate, soil, geotechnical level, crop layout and cultivation conditions are different, affecting the effect of nitrogen fertilizer. From a large agricultural area, from 1975 to 1976 the test results to Hanzhong Basin, wheat and wheat two ripening zone the highest nitrogen efficiency, average nitrogen per catty