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Shifts in Bacterial Community Associated with Green Manure Soybean Intercropping and Edaphic Properties in a Tea Plantation

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  • Fo-Ting Shen

    (Department of Soil and Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 40227, Taiwan
    Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung 40227, Taiwan)

  • Shih-Han Lin

    (Department of Soil and Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 40227, Taiwan)

Abstract

The continuous cultivation with excessive application of agrochemicals has led to the deterioration of soils. Incorporating leguminous green manure (GM) was found to improve the physicochemical and biological properties of soils. However, the influence of GM soybean intercropping on the temporal distribution of bacterial communities in strongly acidic soils is less explored. In this study, a nine-month field trial of soybean intercropping was conducted in a deteriorated tea plantation. This was used to test the hypothesis that GM treatment ameliorates tea-cultivated environments through changing bacterial communities as well as edaphic properties. GM treatment was demonstrated to increase both functional and population diversity during all the months that were considered. An alteration of life strategies exhibited by bacterial communities in GM treatment was observed, which shifted from oligotrophy ( Acidobacteria , Chloroflexi , and the candidate phylum WPS-2) to copiotrophy ( Bacteroidetes and Proteobacteria ). This also contributed to the remarkable increase in metabolic potential of bacterial communities toward all six carbon source categories. The potentially versatile organic matter decomposers and/or plant growth-promoting bacteria, such as Burkholderiaceae , Chitinophagaceae , Sphingobacteriaceae , and Sphingomonadaceae bacteria, were identified as the most effective biomarkers in GM treatment. These bacterial groups showed strong correlation with soil pH; organic matter; and available K, Ca, and Mg. The increased diversity, metabolic potential, and copiotrophic taxa provided insight into the benefits brought by soybean intercropping, with enhanced community stability, facilitated nutrient cycling, and microbe–plant interactions in the strongly acidic tea plantation.

Suggested Citation

  • Fo-Ting Shen & Shih-Han Lin, 2021. "Shifts in Bacterial Community Associated with Green Manure Soybean Intercropping and Edaphic Properties in a Tea Plantation," Sustainability, MDPI, vol. 13(20), pages 1-16, October.
  • Handle: RePEc:gam:jsusta:v:13:y:2021:i:20:p:11478-:d:658561
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    References listed on IDEAS

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    1. Young-Mok Heo & Hanbyul Lee & Sun-Lul Kwon & Yeonjae Yoo & Dongjun Kim & Sang-Il Han & Aslan-Hwanhwi Lee & Changmu Kim & Gyu-Hyeok Kim & Jae-Jin Kim, 2020. "Influence of Tree Vegetation on Soil Microbial Communities in Temperate Forests and Their Potential as a Proactive Indicator of Vegetation Shift Due to Climate Change," Sustainability, MDPI, vol. 12(24), pages 1-16, December.
    2. Lin Tan & Songsong Gu & Shi Li & Zuohua Ren & Ye Deng & Zhonghua Liu & Zhihua Gong & Wenjun Xiao & Qiulong Hu, 2019. "Responses of Microbial Communities and Interaction Networks to Different Management Practices in Tea Plantation Soils," Sustainability, MDPI, vol. 11(16), pages 1-14, August.
    3. Fo-Ting Shen & Shih-Han Lin, 2021. "Priming Effects of Cover Cropping on Bacterial Community in a Tea Plantation," Sustainability, MDPI, vol. 13(8), pages 1-13, April.
    4. Mukan Ji & Chris Greening & Inka Vanwonterghem & Carlo R. Carere & Sean K. Bay & Jason A. Steen & Kate Montgomery & Thomas Lines & John Beardall & Josie van Dorst & Ian Snape & Matthew B. Stott & Phil, 2017. "Atmospheric trace gases support primary production in Antarctic desert surface soil," Nature, Nature, vol. 552(7685), pages 400-403, December.
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