【摘要】 研究了不同耕作方式对黄绵土水稳性团聚体形成的影响。结果表明,>0.25mm土壤水稳定性团聚体含量:免耕+秸秆覆盖(NTS)>免耕(NT)>传统耕作+秸秆还田(TS)>传统耕作(T),团聚体稳定率:免耕+秸秆覆盖(NTS)>免耕(NT)>传统耕作+秸秆还田(TS)>传统耕作(T)。水稳定性团聚体数量以及团聚体的水稳定性均与耕作方式有关。免耕+秸秆覆盖(NTS)、免耕(NT)和传统耕作+秸秆还田(TS)有利于土壤水稳定性团聚体的形成。分析结果同时说明,采用适当耕作方式的同时增加土壤有机质更有利于土壤团聚体的形成和稳定性的增加。更多还原

【Abstract】 The formation of water-stable aggregates in loess soils under different tillage methods was studied.The results showed that the contents of water-stable aggregates were in the following order: NTS>NT>TS>T.And stable aggregates percentage was in the following order: NTS>NT>TS>T.The amount of water-stable aggregates and aggregates stability of the water are highly correlated with tillage methods.The analysis result showed that the suitable tillage method was selected by means of increasing the soil organic matter and being more advantageous to developing soil aggregates.更多还原