Research on the Effects of Tillage Measures and Straw Returning to the field on Soil Humus,Iron Oxides,and Wheat Yield in Wheat Fields
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.
tillage measurestraw returning to the fieldsoil humusiron oxideswheat yield
NETL
NSTL
万方数据
