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Enrichment of phytopathogen dominated by Volutella in the rhizosphere may be an important cause of continuous cropping obstacles in sweetpotato
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  • Long Zhang,
  • Lanfu Liu,
  • Dongliang Sun,
  • Meikun Han,
  • Yaya Hu,
  • Liang Shi,
  • Jie Wang,
  • Xihui Xu,
  • Zhimin Ma,
  • Yahua Chen,
  • Xiafang Sheng
Long Zhang
Nanjing Agricultural University College of Life Sciences
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Lanfu Liu
Hebei Academy of Agricultural and Forestry Sciences Institute of Cereal and Oil Crops
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Dongliang Sun
Nanjing Agricultural University College of Life Sciences
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Meikun Han
Hebei Academy of Agricultural and Forestry Sciences Institute of Cereal and Oil Crops
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Yaya Hu
Hebei Academy of Agricultural and Forestry Sciences Institute of Cereal and Oil Crops
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Liang Shi
Nanjing Agricultural University College of Life Sciences
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Jie Wang
Nanjing Agricultural University College of Life Sciences
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Xihui Xu
Nanjing Agricultural University College of Life Sciences
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Zhimin Ma
Hebei Academy of Agricultural and Forestry Sciences Institute of Cereal and Oil Crops
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Yahua Chen
Nanjing Agricultural University College of Life Sciences

Corresponding Author:[email protected]

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Xiafang Sheng
Nanjing Agricultural University College of Life Sciences
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Abstract

Obstacles related to the continuous cropping of sweetpotato ( Ipomoea batatas (L.) Lam.) restrict its intensive production. However, the effects of continuous cropping on soil properties and/or the rhizosphere microbial community are largely unclear. In this study, we analysed changes in rhizosphere soil chemical properties and microbial communities of sweetpotato across different cultivation years. We observed that the microbial diversity and complexity of the fungal ecological network in rhizosphere soils of sweetpotato were decreased after 5 years of continuous cropping, with significant enrichment in Sphingobium, Gemmatimonas, Volutella, and Neoidriella. Tuber yield, soil pH, and available potassium (AK) content were significantly reduced after continuous cropping, with the soil microbial community having the highest correlation with pH, AK, and ammonium nitrogen (NH 4 +-N). Specifically, soil pH and AK were positively correlated with Bacillus and Gaiella, and negatively correlated with some plant-pathogenic fungi ( Volutella and Neoidriella), while NH 4 +-N showed the opposite trend. In addition, soil pH, AK, and the relative abundance of Bacillus were positively correlated with tuber yield, while Volutella showed the opposite trend. In summary, the continuous cropping of sweetpotato negatively affects rhizosphere soil health, resulting in imbalanced soil fertility and increased abundance of pathogens. These results improve our understanding of factors driving obstacles faced with the continuous cropping of sweetpotato, enabling future studies and the development of technologies to overcome these obstacles.
Submitted to Land Degradation & Development
09 Feb 2024Reviewer(s) Assigned
16 Apr 2024Review(s) Completed, Editorial Evaluation Pending
17 Apr 2024Editorial Decision: Revise Major
07 Aug 2024Review(s) Completed, Editorial Evaluation Pending
13 Aug 2024Editorial Decision: Revise Minor
15 Aug 20242nd Revision Received
15 Aug 2024Review(s) Completed, Editorial Evaluation Pending
15 Aug 2024Submission Checks Completed
15 Aug 2024Assigned to Editor
08 Sep 2024Editorial Decision: Accept