Effects of Different Sweet Maize/Vegetable Soybean Interplanting Systems on Rhizosphere Nitrogen-Fixing Bacteria and Arbuscular Mycorrhizal Fungi Communities
To explore the subsurface interactions in sweet maize/vegetable soybean intercropping system,the re-lationship between the community compositions changes of nitrogen-fixing bacteria and arbuscular mycorrhizal fun-gi under two planting modes of 2:2 and 2:3(I m2s2 and Ⅱ m2s3)and sweet maize yields was analyzed using MiSeq high-throughput sequencing technology.The results showed that the interplanting system significantly reduced the relative abundance of Proteobacteria_unclassified and significantly increased the relative abundance of Aztobacter,Rhizobiales_unclassified and Bradyrhizobium.Intercropping patterns did not have any effect on the Shannon diversi-ty index of arbuscular mycorrhizal fungi community,but significantly increased the fungi abundance index(Chao in-dex)and the relative abundance of Glomeromycota.The optimization of nitrogen-fixing bacteria and arbuscular my-corrhizal fungi communities by intercropping patterns could enhance the symbiotic interaction between root system,significantly increased the contents of available nitrogen and available phosphorus in soil,and increased sweet maize yield.The intercropping pattern Ⅱ m2s3 was superior to I m2s2.
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