目的通过6 a田间定点定位试验,探究不同保护性耕作处理对土壤结构、水分贮蓄、玉米产量、降水及水分利用效率的影响,揭示不同处理下土壤结构、作物水分利用和产量间的内在关联。方法试验共设置传统旋耕(TR)、旋耕+秸秆机械粉碎还田(TRS)、深松+秸秆机械粉碎还田(DLS)和免耕+秸秆机械粉碎留茬覆盖(NTC)4种处理。结果与TR相比,DLS和TRS均减小表层至30 cm的土壤体积质量及紧实度,NTC提升表层0~20 cm土层土壤体积质量和紧实度。相比之下,DLS增加深层20~40 cm土层土壤毛管孔隙度 ...
梁改梅 +5 more
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