玉米秸秆不同还田方式对黑钙土表层和亚表层养分及腐殖质的影响OA北大核心CSTPCD
Effects of Different Returning Methods of Corn Straw on Surface and Subsurface Nutrients and Humus in Chernozem Soil
针对不合理开发垦殖利用致使东北黑土肥力下降、土层流失的问题,设置无秸秆还田对照(ck)、秸秆富集深埋(FJ)、秸秆浅灭茬覆土(QF)、秸秆深翻(SF)和秸秆覆盖(FG)5个处理.研究玉米秸秆不同还田方式对黑钙土表层(0～20 cm)和亚表层(20～40 cm)土壤养分与腐殖质组分的影响,结果表明:秸秆还田与常规作物种植相比,提高了黑钙土有机质含量和各腐殖质组分碳含量,提高了土壤养分含量;秸秆还田使土壤表层和亚表层土壤PQ值增大,提高了土壤腐殖化程度;各土层中胡敏酸(HA)的Δlg K值变大,土壤腐殖物质结构简单化.秸秆浅灭茬还田与秸秆富集深还分别在土壤表层与亚表层相较其他还田方式对土壤改良效果更显著.
The effects of corn straw returning on soil nutrients and humus composition in chernozem soil surface(0-20 cm)and subsurface(20-40 cm)were studied.A total of five treatments were set up:control without straw returning(ck),straw enrichment and deep burial(FJ),straw shallow stubble removal and soil covering(QF),straw deep turning(SF)and straw covering(FG).The results showed that compared with conventional crop planting,straw returning increased the content of organic mat-ter and carbon in chernozem soil,as well as soil nutrients.Straw returning increased the PQ value of soil surface and subsurface soil and increased the degree of soil humification.The Δlg K value of HA in each soil layer increased and the structure of soil humus was simplified.Straw returning with shal-low stubble removal and straw enrichment had more significant effects on soil improvement in sur-face and subsurface soil,respectively.
窦文爽;窦森
吉林农业大学资源与环境学院,长春 130118
农业科学
玉米秸秆还田方式黑钙土土壤养分腐殖质
corn strawreturning methodchernozemsoil nutrienthumus
《吉林农业大学学报》 2024 (005)
705-711 / 7
国家自然科学基金项目(42077022),吉林省重点研发计划项目(20200402098NC)
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