Effects of the Long-Term Continuous Cropping of Yongfeng Yam on the Bacterial Community and Function in the Rhizospheric Soil

文献类型： 外文期刊

第一作者： Yao, Jian

作者： Yao, Jian;Wu, Caiyun;Fan, Linjuan;Kang, Meihua;Liu, Zirong;Xu, Xueliang;Yao, Yingjuan;Huang, Yuhui

作者机构：

关键词： Yongfeng yam; continuous cropping; rhizospheric soil; bacterial community; network

期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）

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年卷期： 2023 年 11 卷 2 期

页码：

收录情况： SCI

摘要： Replant disease caused by continuous cropping commonly occurs in yam with consecutive monoculture. However, little is known about how the continuous cropping of yam affects the rhizospheric soil bacterial community structure. In this study, the effects of continuous cropping on rhizospheric soil characteristics, bacterial diversity, and community structure were investigated in the Yongfeng yam fields under monoculture for 1, 5, 10, 15, and 20 years. Long-term monoculture caused soil acidification and increased the concentration of available potassium (AK) and available phosphorus (AP), and soil bacterial richness, but decreased the soil bacterial diversity. An exception was for the field under monoculture for 20 years as it showed the highest bacterial diversity. The relative abundance of beneficial bacteria, such as Proteobacteria, Actinobacteria, and Chloroflexi decreased while the relative abundance of harmful bacteria, including Gemmatimonadetes and Acidobacteria, increased with an extended continuous cultivation time. The networks varied among yams with different cultivation years and became complex with the increase in cultivation years. However, after time in monoculture, the bacterial network decreased gradually and existed stably. These changes in bacterial community composition and co-occurrence of networks may increase the potential risk of soil-borne disease and reduce the yield and quality of Yongfeng yam.

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