Enrichment of Phytopathogen Dominated by Volutella in the Rhizosphere May Be an Important Cause of Continuous Cropping Obstacles in Sweet Potatoes
文献类型： 外文期刊
作者： Zhang, Long 1 ; Liu, Lanfu 2 ; Sun, Dongliang 1 ; Han, Meikun 2 ; Hu, Yaya 2 ; Shi, Liang 1 ; Wang, Jie 1 ; Xu, Xihui 1 ; Ma, Zhimin 2 ; Chen, Yahua 1 ; Sheng, Xiafang 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Life Sci, Nanjing, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Hebei Key Lab Crop Genet & Breeding, Shijiazhuang, Peoples R China
3.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing, Peoples R China
4.Zhejiang A&F Univ, Coll Environm & Resource Sci, Hangzhou, Peoples R China
5.Univ Tokyo, Asian Nat Environm Sci Ctr, Tokyo, Japan
关键词： continuous cropping obstacles; plant-pathogenic fungi; rhizosphere microbial community; soil chemical properties; soil health
期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：3.7； 五年影响因子：4.4 ）
ISSN： 1085-3278
年卷期： 2024 年 35 卷 17 期
页码：
收录情况： SCI
摘要： Obstacles related to the continuous cropping of sweet potatoes (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 analyzed changes in rhizosphere soil chemical properties and microbial communities of sweet potatoes across different cultivation years. We observed that the microbial diversity and complexity of the fungal ecological network in rhizosphere soils of sweet potatoes 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 (NH4+-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 NH4+-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 sweet potatoes negatively affects rhizosphere soil health, resulting in imbalanced soil fertility and an increased abundance of pathogens. These results improve our understanding of factors driving obstacles faced with the continuous cropping of sweet potatoes, enabling future studies and the development of technologies to overcome these obstacles.
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