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近年来,随着施肥(特别是氮素化肥)水平的不断提高,小麦产量也逐年增加。但是,当前小麦生产上盲目增加施肥量,加之施肥方法不当,致使浪费大、效益低、肥害重的问题日趋严重。自1981年秋播以来,我们围绕如何提高施肥的经济效益问题,进行了多点次试验研究,初步总结为“两控一减”经济施肥技术。一、控制总施氮量不同氮素化肥用量试验分别在高肥和中
In recent years, with the continuous improvement of fertilization (especially nitrogenous fertilizer), the output of wheat has also increased year by year. However, blindly increasing the amount of fertilizers in the current wheat production and the improper application of fertilizers have resulted in the problem of waste, low benefit and serious fatal injury. Since the autumn broadcast in 1981, we have carried out multi-point experimental studies on how to improve the economic benefits of fertilization. The preliminary conclusion is that “two control and one reduction” economic fertilization technologies. First, the total amount of nitrogen applied to control the amount of different nitrogen fertilizer test in high fat and in the