土壤2025，Vol.57Issue(4)：885-891,7.DOI:10.13758/j.cnki.tr.2025.04.020
不同类型覆盖作物与玉米套作对紧实红壤的响应
Response of Different Cover Crops and Maize Relay Intercropping to Compacted Red Soil
摘要
Abstract
In this study,non-compacted and compacted treatments of red soil were established in Jinggangshan Agricultural High-Tech Zone,Ji'an City,Jiangxi Province,and different summer cover crops(soybean,sesbania,and sudangrass)and maize relay intercropping experiments were conducted with monocropped maize as a control(CK),to analyze the response of different cover crops and maize relay intercropping to compacted red soil.The results showed that soil compaction limited soybean root growth with a 26%reduction in total root length.In contrast,sudangrass had a greater root diameter and was less affected by soil compaction.Under non-compacted conditions,soil water content increased by 16%and 21%in maize relay intercropped with sudangrass compared to in maize relay intercropped with sesbania and soybean,respectively.Additionally,maize relay intercropped with sudangrass,sesbania or soybean significantly increased above-ground biomass of maize compared to CK.Among these,maize relay intercropped with soybean promoted the uptake of available nitrogen by maize and resulted in the reduction of alkali-hydrolyzable nitrogen content of the soil by 22%,and its above-ground biomass of maize was the highest.Under compacted conditions,maize relay intercropped with sesbania or soybean significantly increased maize above-ground biomass relative to CK,while maize relay intercropped with sudangrass did not significantly promote maize growth,and soil compaction did not significantly affect maize above-ground biomass under maize relay intercropped with sudangrass compared to maize relay intercropped with sesbania or soybean.Therefore,in non-compacted soil,maize relay intercropped with soybean is a more suitable cropping pattern in the southern red soil area,which can promote maize growth.And in compacted soil,maize relay intercropped with sesbania or soybean can increase maize above-ground biomass,while maize relay intercropped with sudangrass is less sensitive to compacted red soil.关键词
覆盖作物/土壤容重/套作/根系构型Key words
Cover crop/Soil bulk density/Relay intercropping/Root architecture分类
农业科技引用本文复制引用
熊鹏,陈旭,罗泽军,杨茜,黄尚书,张中彬,彭新华..不同类型覆盖作物与玉米套作对紧实红壤的响应[J].土壤,2025,57(4):885-891,7.基金项目
井冈山农高区省级科技专项"揭榜挂帅"项目(20222-051261-2-2),江西省教育厅科学技术研究项目(GJJ2200445)和大学生创新创业训练计划项目(S20241041020)资助. （20222-051261-2-2）
