| Analysis of microbial community structure and diversity in selenium\|sand melon soil under different continuous cropping years |
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| DOI：10.7606/j.issn.1000-7601.2020.01.30 |
| Key Words: high throughput sequencing technique continuous cropping bacterial community structure diversity |
| Author Name | Affiliation | | YUE Sijun | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | FENG Cuie | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | YANG Yanyan | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | CHEN Liping | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | GUO Yang | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | ZHENG Rui | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China | | SU Jianyu | Western Biological Resources Protection and Utilization Lab of National Education Ministry, College of Life Sciences, Ningxia University, Yinchuan, Ningxia, 750021, China |
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| Abstract: |
| High\|throughput sequencing technique was used to study the soil bacterial community structure and diversity of selenium\|sand melon soil in Zhongwei area of Ningxia under different continuous cropping years. The results showed that bacterial diversity index and richness index gradually increased with the increase in continuous cropping years. A total of 39 phyla, 98 classes, and 620 genera of bacteria were isolated from 5 samples of selenium\|sand melon soil with different successive cropping years. The dominant phylum was Actinobacteria, Proteobacteria, Chloroflexi and Acidobacteria. With the continuous cropping time increased, the abundance of Actinobacteria and Acidobacteria increased first and then decreased, the abundance of Proteobacteria gradually decreases, the abundance of Chloroflexi decreased first, then increased and then decreased. The dominant class was Actinobacteria, Acidobacteria, Alphaproteobacteria, Gmmatimonadetes, Bacilli, Thermomicrobia, Gammaproteobacteria and Betaproteobacteria. The dominant order was norank_c_Acidobacteria, Bacillales, Gemmatimonadales, Rhizobiales. The dominant orders were norank_c_Acidobacteria, Bacillales, Gemmatimonadales, and Rhizobiales. RDA analysis showed that organic matter and available phosphorus were the main influencing factors of bacterial community composition in selenium\|sand melon continuous cropping soil. The results showed that the occurrence of continuous cropping obstacle of selenium\|sand melon was not caused by the change of soil physical and chemical properties, but was caused by the decrease of the abundance of beneficial microorganisms such as Actinobacteria. Proteobacteria. Chloroflexi, Acidobacteria and Firmicutes with the increase of continuous cropping time. |
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