通过多年田间定位和室内培养试验,研究了秸秆覆盖还田下的土壤有机无机复合作用.结果表明:稻草覆盖还田2年土壤有机质碳的追加复合量为0.438kg~(-1),追加复合度为83.11%;给合态腐殖质含量以松结态和紧结态类型增加较多,稳结态数量变化不明显;粗粒复合体数量增多,细粒复合体减少,以0.01～0.05mm级别复合体数量及其有机质含量增加最多;秸秆翻压还田虽然追加复合量大于覆盖还田的处理,但其追加复合度则较低 The results showed that the added compound amount of soil organic carbon was 0.438kg ~ (-1) after straw returning to the field for two years, and the compounding of compound Degree of 83.11%; the content of the composite humus increased more in the loosely knotted and tight knotty patterns, the number of steady state changes was not obvious; the number of the coarse-grained complex increased, the fine-grained complex decreased, with the level of 0.01 ~ 0.05mm The amount of complex and the content of organic matter increased most; although the amount of compounding by straw returning was higher than that of returning straw to field, the additional compound degree was lower