秸秆还田对小麦–玉米轮作土壤有机无机胶结物质的影响研究

Effects of Straw Returning on Soil Organic and Inorganic Cementitious Substances in Wheat-Maize Rotation

通过研究施肥和秸秆还田后,小麦–玉米轮作土壤中胶结物质的含量,探究秸秆还田对土壤理化性质的影响。结果表明,NP + 1/3S (氮磷与三分之一秸秆还田)施肥和秸秆还田均增加了土壤中五碳糖和六碳糖的含量。同时增加了游离态氧化铁、游离态氧化铝含量,有利于土壤中团聚体的稳定。因此,在小麦–玉米轮作中建议采用NP + 1/3S秸秆还田模式进行种植更有利于胶结物质形成,促进土壤团聚体稳定。

By studying the content of cementitious substances in wheat-maize rotation soil after fertilization and straw returning, the effect of straw returning on soil physicochemical properties was explored. The results showed that both NP + 1/3S (nitrogen and phosphorus and one-third of straw returning) fertilization and straw returning increased the content of penta- and hexa-sugars in soil. At the same time, the content of free iron oxide and free alumina was increased, which was beneficial to the stability of aggregates in soil. Therefore, it is recommended to use the NP + 1/3S straw returning mode for planting in the wheat-maize rotation, which is more conducive to the formation of cementitious substances and promotes the stability of soil aggregates.