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The Divergence of Bacterial Communities among Continuous Cropping, Rotational Cropping and New Planting Potato Soils
Author(s):
1. Qiulong Hu: Hunan Agricultural University, Changsha, Hunan, China; Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China
2. Lin Tan: Hunan Agricultural University,Changsha, Hunan,China
3. Xingxing Yang: Hunan Center of Crop Germplasm Resources and breeding crop,Changsha, Hunan,China
4. Ye Deng: Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS),Beijing,China
5. Songsong Gu: Hunan Agricultural University,Changsha, Hunan,China
6. Jiren Chen: Hunan Agricultural University,Changsha, Hunan,China
7. Liu Cai: Hunan Agricultural University,Changsha, Hunan,China
8. Qian Zhou: Hunan Agricultural University,Changsha, Hunan,China
9. Xinxi Hu: Hunan Agricultural University,Changsha, Hunan,China
10. Yuzhi Qin: Hunan Agricultural University,Changsha, Hunan,China
11. Xingyao Xiong: Hunan Agricultural University,Changsha, Hunan,ChinaInstitute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences,Beijing,China
Abstract:
In this study, the diversity, composition and structure of bacterial community were studied in continuous cropping, rotational cropping and new planting potato soils in Hunan Province of China by using high-throughput 16S rRNA gene Illumina sequencing. The results showed that continuous cropping soil had the lowest microbial diversity, while rotational cropping and new planting soils exhibited the similar levels of microbial diversity according to Shannon and Richness indices (P < 0.05). The principal coordinates analysis (PCoA) showed a perfect separation among bacterial community structures of continuous cropping, rotational cropping and new planting potato soils. Community composition analysis showed that continuous cropping potato soil had higher relative abundances of non-beneficial bacteria (Rhodanobacter, Gaiella, Flavobacterium and Burkholderia) that were unfavorable for soil quality and its development as well as agricultural production. In addition, soil property analysis revealed that pH value and total organic carbon (TOC) content in continuous cropping soil was significantly lower than those in rotational cropping and new planting potato soils. Relationship between soil properties and microbial communities indicated that total phosphorus, available phosphorus, available potassium and TOC contents as well as pH were important physicochemical factors that significantly affected bacterial diversity and community structure in continuous cropping, rotational cropping and new planting soils. Therefore, the pH value and TOC content were determined as the most important physicochemical factors to alter the microbial community in continuous cropping potato soils. Collectively, these results provided valuable insights into the mechanisms of continuous-cropping obstacle, which might contribute to improve soil microbial diversity and to enhance soil productivity of continuous cropping potato soil.
Page(s): 721-729
DOI: 10.17957/IJAB/15.1344
Published: Journal: International Journal of Agriculture and Biology, Volume: 23, Issue: 4, Year: 2020
Keywords:
potato , relationship , community structure , microbial diversity
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