Effect of Sophora Davidii Skeels and Pennisetum Sinese Roxb Intercropping Systems on Soil Nutrients and Evaluation of Comprehensive Fertility

Abstract

In this study, field experiments were used to set three cropping patterns: Sophora davidii Skeels monocropping pattern, Pennisetum sinese Roxb monocropping pattern, S. davidii and P. sinese intercropping pattern to explore the effect of different cropping patterns on soil nutrients and fertility. The results showed that the soil moisture content under different cropping patterns in the 0-30cm soil layer was as follows: S. davidii and P. sinese intercropping>P. sinese monocropping>S. davidii monocropping, and there were significant differences between different cropping patterns in the same soil depth (P<0.05); soil pH increased gradually with the increasing depth in soil, and the difference between different cropping patterns in the same soil depth was significant (P<0.05); S. davidii and P. sinese intercropping 0-10 cm soil layer of organic matter, total nitrogen, total phosphorus, available nitrogen and available phosphorus were significantly higher than that of S. davidii and P. sinese monocropping (P<0.05); In the 0-20cm soil layer, the ammonium nitrogen in P sinese monocropping pattern was significantly higher than that in S. davidii monocropping and S. davidii and P. sinese intercropping, while in the 20-30 cm soil layer, intercropping were significantly higher than that in the monocropping (P <0.05); in the 0-30cm soil layer, S. davidii monocropping pattern was significantly higher than P. sinese monocropping and S. davidii and P. sinese intercropping (P <0.05) (except for that of the P sinese monocropping 10-20 cm). The quality of soil integrated fertility index (FQI) showed that the rank of FQI value in the 0-30 cm soil layer was as follows: S. davidii and P. sinese intercropping>S. davidii monocropping>P. sinese monocropping. These fingdings suggest that the S. davidii and P. sinese intercropping could effectively improved 0-30 cm soil comprehensive fertility.