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| Effects of cover crop diversity on soil microbial community functions in a kiwifruit orchard |
| Received:September 03, 2019 |
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| KeyWord:water source conservation area;cover crops;soil microbe;diversity;Biolog micro plate method |
| Author Name | Affiliation | E-mail | | LI Qing-mei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHANG Ling-ling | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIU Hong-mei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHANG Yan-jun | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHAO Jian-ning | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHANG Hai-fang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | YANG Dian-lin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | yangdianlin@caas.cn | | WANG Hui | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | wanghui03@caas.cn |
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| Abstract: |
| In this paper, we used the Biolog micro plate technique to analyze the effects of cover crop diversity(C2, two cover crop species; C4, four cover crop species; C8, eight cover crop species; CK,no cover crop)on functional diversity of soil microbial communities in a kiwifruit orchard in the water source conservation area of Danjiangkou. The results showed that the carbon utilization degree, functional diversity index, and richness index of the soil microbial community in cover crop treatments were higher than in the untreated control. The Shannon index and richness index were positively correlated with soil moisture content, organic carbon, microbial biomass carbon, and nitrogen. The principal component analysis and the fingerprints of the physiological carbon metabolism of the microbial community demonstrated that carbon source metabolic ability of the soil microbial communities was improved by increasing cover crop species, and compared with the clear tillage, the utilization rate on D-Mannitol, L-Arginine, L-Asparagine, L-Phenylalanine, γ-Hydroxybutyric acid, α-keto butyric acid, 4-Hydroxybenzoic acid, and Tween 40 was improved significantly. In addition, the effect of four kinds of cover crop treatment on the soil ecological environment of kiwifruit orchard is superior to that of two species and eight species. In summary, increasing cover crop diversity in a kiwifruit orchard changed the soil environmental factors and had a great influence on the metabolic activity and functional diversity of the microbial communities. |
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