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该文采用尼龙网袋埋土，在不同时间取样分析土壤中的有机质和主要养分含量的方法。研究秸秆还田对土壤养分的影响，其结果表明秸秆还土后可提高土壤有机质及有效养分；不同的作物秸秆对土壤有机质和养分的影响不一样。
In this paper, nylon mesh bag buried in different time sampling and analysis of soil organic matter and the main nutrient content of the method. The effect of returning straw to soil on the soil nutrient was studied. The results showed that the soil organic matter and available nutrients could be increased after the straw was returned to the soil. The effects of different crop stalks on soil organic matter and nutrients were different.