湖北农业科学2025，Vol.64Issue(6)：39-44,6.DOI:10.14088/j.cnki.issn0439-8114.2025.06.008
模拟水旱轮作条件下土壤磷素含量对秸秆还田的响应及变化规律
Response and dynamics of soil phosphorus to straw incorporation under simulated paddy-upland rotation conditions
摘要
Abstract
To investigate the effects of straw incorporation on soil phosphorus dynamics under paddy-upland rotation systems,soil samples from long-term rice-rapeseed rotation experimental fields were collected for indoor simulation experiments.Four treatments were established:upland cropping(D),paddy cropping(W),upland cropping+straw incorporation(D+S),and paddy cropping+straw incorporation(W+S).Soil phosphorus fractions were extracted and quantified using the Hedley phosphorus fractionation meth-od,and the soil available phosphorus variations were observed.The results showed that under upland conditions,straw incorporation increased soil available phosphorus by 20.6%,while under paddy conditions,it enhanced available phosphorus by 56.4%.Overall,available phosphorus content improvement was more pronounced under paddy cropping than under upland cropping.Comprehensive analysis indicated that the W+S treatment most effectively enhanced soil available phosphorus.Redundancy analysis(RDA)revealed that water regime and straw incorporation contributed 73.2%and 26.8%,respectively,to soil phosphorus variations.Straw incorporation not only elevated available phosphorus but also regulated phosphorus speciation,thereby enhancing soil phosphorus supply capacity.关键词
土壤磷素/有效磷/秸秆还田/水旱轮作/Hedley法Key words
soil phosphorus/available phosphorus/straw incorporation/paddy-upland rotation/Hedley method分类
农业科技引用本文复制引用
赵希梅,裴霄敏,李奥明洋,刘天雅,张政,李梦蝶,李继福..模拟水旱轮作条件下土壤磷素含量对秸秆还田的响应及变化规律[J].湖北农业科学,2025,64(6):39-44,6.基金项目
农业农村部作物需水与调控重点实验室项目(ZWS202302) （ZWS202302）
农业农村部农作物种植补贴项目(J2022015) （J2022015）
