以往对有机肥质量等级的划分,主要是依据长期田间试验所确定的有机肥中影响作物产量及改良土壤的主导因素,并在一定程度上兼顾其他因素来进行统计分析评价的,此方法比较复杂,耗时长,进行起来十分困难。鉴此,我们根据长期试验结果,以有机肥中有机物、全氮、全磷、全钾含量四因子的分 In the past, the classification of organic fertilizer quality grades was mainly based on the long-term field experiments to determine the impact of crop yield on organic fertilizer and the dominant factor in improving the soil, and to some extent, taking into account other factors for statistical analysis and evaluation, this method is more complicated , It takes a long time and it is very difficult to carry it out. In view of this, we based on long-term test results to organic fertilizer organic matter, total nitrogen, total phosphorus, total potassium content of four points