Effects of Crop and Grass Intercropping on the Soil Environment in the Karst Area

The karst area in Southwest China is facing the challenges of environmental degradation and agricultural safety. Intercropping a green efficient planting mode that can make full use differences crops’ physiological ecological characteristics land climate resources while considering yield benefits. This study selected five treatments: Salvia miltiorrhiza monoculture, Dactylis glomerata intercropped with S. miltiorrhiza, Cichorium intybus S.miltiorrhiza, Trifolium repens Lolium perenne S.miltiorrhiza. Using one-way ANOVA, principle component analysis (PCA), linear correlation analysis, we analyzed changes soil physicochemical factors coupling relationship between them intercropping mode. results showed at different depths, bulk density was significantly lower than single cropping (p < 0.05), water content total porosity were increased 0.05). There no significant pH among models > organic matter higher nitrogen phosphorus also changes. there physical properties 0.05); chemical negatively correlated, content, field water-holding capacity, positively correlated Therefore, it suggested to strengthen management grass intercropping, improve pore structure, regulate distribution fertilizer, resilience systems southwest China.