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| Effects of crop rotation on soil physicochemical properties and bacterial community of foxtail millet rhizosphere soil |
| Received:January 22, 2018 |
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| KeyWord:foxtail millet;crop rotation;rhizosphere microorganisms;soil enzymes |
| Author Name | Affiliation | E-mail | | NIU Qian-yun | School of Life Science, Shanxi University, Taiyuan 030006, China | | | HAN Yan-sha | School of Life Science, Shanxi University, Taiyuan 030006, China | | | XU Li-xia | School of Life Science, Shanxi University, Taiyuan 030006, China | | | ZHANG Ai-ying | Institute of Millet Research, Shanxi Academy of Agricultural Science, Changzhi 046000, China | | | YI Hui-lan | School of Life Science, Shanxi University, Taiyuan 030006, China | yihl@sxu.edu.cn | | GUO Er-hu | Institute of Millet Research, Shanxi Academy of Agricultural Science, Changzhi 046000, China | guoerhu2003@163.com |
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| Abstract: |
| In the present study, four crop systems including continuous cropping millet (Si-Si-Si), potato-corn-millet rotation (St-Zm-Si), corn-soybean-millet rotation (Zm-Gm-Si), and soybean-potato-millet rotation (Gm-St-Si) were conducted to investigate the influence of crop rotation on soil physical and chemical properties, soil enzyme activities, foxtail millet yield and rhizosphere bacterial community compositions. Our results showed that Gm-St-Si rotation promoted soil pH value and increased the content of alkaline hydrolysis nitrogen, available phosphorus and potassium, and organic matter. The same trend was observed in the activities of catalase, polyphenol oxidase, cellulase and sucrase enzymes in soils. In addition, crop yield was markedly increased after Gm-St-Si rotation cropping. Foxtail millet rhizosphere bacterial community compositions were also investigated using the high throughput illumina sequencing. The results showed that there was significant difference in the rhizosphere bacterial community compositions between rotation and continuous cropping. Soil samples of crop rotations occupied more OTU and showed higher diversity than that of the continuous cropping. Compared to the continuous cropping soil, Gm-St-Si rotation soil harbored higher abundance of Verrucomicrobia, Acidobacteria and Planctomycetes, as well as Planctomyces, Gemmata, Flavisolibacter, and Luteolibacter. Taken together, it was concluded that Gm-St-Si rotation could improve soil ecological environment, promote soil fertility, enhance soil microbial diversity, and thus increase the crop yield of foxtail millet. |
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