养分平衡法系著名土壤测试学家曲劳(Truog)所创,后为斯坦福(Stanford)所完善。本方法是近二十年来国内外计量施肥中一个重要的方法,印度、美国、苏联和我国的施肥实践中广为应用。养分平衡法计量施肥可用下式表达: 施肥量=计划产量需肥量-土壤供肥量/肥料中有效养分含量×肥料利用率 由算式可知,欲达准确计量,必须获得计划产量需肥量、土壤供肥量、肥料中有效养分含量和肥料利用率等几大参数,缺一不可。 我国各地广大测土施肥工作者在近八年来进行了大量试验工作,得到了许多宝贵的 The nutrient balance method was created by the famous soil test scientist Truog and later refined by Stanford. This method is an important method of measuring fertilization both at home and abroad in recent twenty years. It is widely used in fertilization practice in India, the United States, the Soviet Union and China. Nutrient balance measurement Fertilization can be expressed by the following formula: Fertilizer = planned yield required Fertilizer - soil fertilizer / effective nutrient content in fertilizer × fertilizer utilization From the formula we can see, to reach accurate measurement, you must obtain the planned output required fertilizer, Soil for fertilizer, fertilizers in the effective nutrient content and fertilizer utilization several parameters, are indispensable. The vast majority of soil testing and fertilization workers throughout China have carried out a large amount of experimental work in the past eight years and obtained many valuable