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Effect of natural weed and Siratro cover crop on soil fungal diversity in a banana cropping system in southwestern China

文献类型： 外文期刊

作者： Wang, Yongfen 1 ; Zhang, Wenlong 2 ; Goodwin, Paul H. 3 ; Zheng, Si-Jun 2 ; Li, Xundong 2 ; Xu, Shengtao 2 ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Trop & Subtrop Cash Crops, Baoshan, Yunnan, Peoples R China

2.Yunnan Acad Agr Sci, Agr Environm & Resources Inst, Yunnan Key Lab Green Prevent & Control Agr Transbo, Kunming, Yunnan, Peoples R China

3.Univ Guelph, Sch Environm Sci, Guelph, ON, Canada

4.Biovers Int, Kunming, Yunnan, Peoples R China

关键词： cover crop; banana; soil fungal communities; soil microbial diversity; co-occurrence network

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.2； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： IntroductionNatural weed cover and a legume cover crop were examined to determine if they could impact soil fungal diversity as an indicator of soil quality in banana production. MethodsBanana in Yunnan Province, China, was grown under three treatments: conventional tillage (bare soil), natural weed cover (primarily goosegrass (Eleusine indica (L.) Gaerth)), or a cover crop (Siratro (Macroptilium atropurpureum (DC.) Urb.)). Analysis of the soil fungal communities between 2017 and 2020 was done by Illumina Miseq high-throughput sequencing. ResultsMost significant effects were in the intercropping area for the treatments, whereas it was rarely observed in the furrow planted with banana. Based on the Shannon and Simpson diversity indices, soil fungal diversity in the intercropping area significantly decreased following planting banana in 2017 with all three treatments. However, both the Shannon and Simpson diversity indices showed that there were significant increases in fungal soil diversity in 2019 and 2020 with natural weed cover or Siratro compared to bare soil. At the end of the experiment, significant increases in fungal genera with Siratro compared to bare soil were observed with Mortierella, Acremonium, Plectophaerella, Metarhizium and Acrocalymma, and significant decreases were observed with Fusicolla, Myrothecium, Exserohilum, Micropsalliota and Nigrospora. Siratro resulted in higher stability of the soil fungal microbiome by increasing the modularity and the proportion of negative co-occurrences compared to bare soil. For fungal guilds, Siratro significantly increased saprotrophs_symbiotrophs in 2019 and 2020 and significantly decreased pathogens_saprotrophs in 2020 compared to bare soil. DiscussionUsing Siratro as a cover crop in the intercropping area of banana helped maintain soil fungal diversity, which would be beneficial for soil health with more symbiotrophs and less pathogens in the soil. However, further research is needed to determine the long-term impact of weed or Siratro cover crop on the fungal soil ecosystem and growth of banana.

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