Intercropping Effects of Sophora davidii and Silage Maize on Soil Physicochemical Properties, Enzyme Activities and Yield

Abstract

Crops-beans intercropping has the advantages of efficient utilization of light energy, space environmental resources and increasing land productivity. People have done a lot of research on the yield and soil nutrient utilization of grain crops intercropping system, which proves that crops-beans intercropping is of great significance in production practice. However, there is little research on the soil properties and yield affected by intercropping forage grass with shrub legume. In order to explore the ecological value and yield effect in the intercropping mode of shrub legume and forage grass, and to provide the high-quality forage resources in the region, we selected Sophora davidii and silage corn for field intercropping experiment. To study the benefit of intercropping and the feedback regulation between crop yield and soil fertility. The results showed that the land equivalent ratio was 1.501 under intercropping mode, and intercropping silage corn between S. davidii rows could improve the land use efficiency, and compared with S. davidii monoculture system, the land yield increased by 1286.4% in fresh matter and 738.5% in dry matter. At the same time, intercropping increased the content of available N in soil and promoted the sustainable utilization ability of soil. This has important enlightenment for the restoration area of S. davidii planting in karst area, taking into account the restoration effect, improving soil, increasing grass and increasing efficiency.