【摘要】 探究耕作措施与秸秆还田对土壤腐殖质、铁氧化物及小麦产量的影响。试验在保护性耕作长期定位试验地进行，采用裂区设计。主区设免耕、深松两种耕作措施，副区设秸秆全量还田、秸秆不还田两种水平。共设计免耕秸秆还田（NTs）、免耕秸秆不还田（NT0）、深松秸秆还田（STs）和深松秸秆不还田（ST0）4种处理。采用冬小麦（济麦22）—夏玉米（郑单958）一年两熟种植制度。结果表明，深松秸秆还田增加了土壤有机质的含量、小麦穗数及千粒质量，提高了腐殖质富里酸的含量及小麦产量，减少了游离态铁氧化物的含量，增强了对土壤有机碳的固定。更多还原

【Abstract】 The effects of tillage measures and straw returning to the field on soil humus, iron oxide and wheat yield were explored. The experiment was carried out in the long-term positioning test site of conservation tillage, using the split zone design. The main area has two measures of no-tillage and subsoiling, and the secondary area has two levels of straw returning to the field and straw not returning to the field. Four kinds of treatments were designed: no-tillage straw returning to field(NTs), no-tillage straw not returning to field(NT0),subsoiling straw returning to field(STs) and subsoiling straw not returning to field(ST0). The planting system of winter wheat(Jimai 22)-summer corn(Zhengdan 958) is adopted. The results show that the return of subsoiling straw increases the content of soil organic matter, the number of wheat ears and the mass of thousand grains, improves the content of humic acid and wheat yield, reduces the content of free iron oxide, and enhances the fixation of soil organic carbon.更多还原