| Effects of intercropping forage rape with Sudan grass on soil enzyme activity and bacterial community structure in the irrigation areas along the Yellow River |
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| DOI：10.7606/j.issn.1000-7601.2024.03.16 |
| Key Words: intercropping forage rape Sudan grass enzyme activity bacterial community |
| Author Name | Affiliation | | LI Leilei | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | LI Lijun | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | ZHANG Yanli | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | YANG Jinhu | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | WANG Peipei | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | ZHU Lihua | Ordos Academy of Agricultural and Animal Husbandry Sciences, Ordos, Inner Mongolia 017000, China | | WANG Shiqing | Ordos Academy of Agricultural and Animal Husbandry Sciences, Ordos, Inner Mongolia 017000, China | | ZHAO Guoqing | Ordos Academy of Agricultural and Animal Husbandry Sciences, Ordos, Inner Mongolia 017000, China |
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| Abstract: |
| To explore the effects of intercropping of forage rape and Sudan grass on soil enzyme activity and bacterial community structure in the Yellow River irrigation area, high\|throughput sequencing technology was used in Dalate Banner, Ordos City, Inner Mongolia in 2022, combining with soil enzyme activity. The differences of soil bacterial community structure and enzyme activity under three planting modes of monoculture of forage rape, monoculture of Sudan grass and intercropping of forage rape and Sudan grass were compared and analyzed. The results showed that the activities of soil urease and sucrase were significantly increased by 8.09%~13.93% and 13.01%~58.02%, respectively in the intercropping of forage rape and Sudan grass compared with the monoculture of forage rape and Sudan grass. The intercropping of forage rape and Sudan grass increased the number of soil bacterial OTUs and bacterial community diversity index. The composition and relative abundance of soil bacterial communities under different planting patterns were different. Proteobacteria, Bacteroidota, Actinobacteriota, and Gemmatimonadota were the dominant phyla, and Salinimicrobium, Marinobacter, and Gramella were the dominant genera. The intercropping planting pattern increased the relative abundance of Proteobacteria, Actinobacteriota, Gemmatimonadota, and Gramella. Correlation analysis showed that soil urease and sucrase were significantly positively correlated with Proteobacteria and significantly negatively correlated with Acidobacteria. Soil alkaline phosphatase was significantly positively correlated with Bdellovibrionota, and negatively correlated with Actinobacteria. There was a significant positive correlation between soil catalase and Bdellovibrionota, and a significant negative correlation with Firmicutes. In summary, the intercropping of forage rape and Sudan grass changed the soil bacterial community structure and increased the soil enzyme activity and the abundance of beneficial bacteria species, which could be used as an effective measure to improve the saline\|alkali soil micro\|ecological environment in the Yellow River irrigation area. |
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