Preprints
https://doi.org/10.5194/soil-2021-95
https://doi.org/10.5194/soil-2021-95

  21 Sep 2021

21 Sep 2021

Review status: this preprint is currently under review for the journal SOIL.

Soil bacterial community triggered by organic matter inputs supports a high-yielding pear production

Li Wang1, Xiaomei Ye1, Hangwei Hu2, Jing Du1, Yonglan Xi1, Zongzhuan Shen3, Jing Lin4, and Deli Chen2 Li Wang et al.
  • 1Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Crop and Livestock Integrated Farming, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China
  • 2Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Melbourne, Victoria 3010, Australia
  • 3Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, China
  • 4Institute of Pomology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China

Abstract. The roles of microorganisms in enhancing crop production have been demonstrated for a range of cropping systems. Most studies to date, however, have been confined to a limited number of locations, making it difficult to identify general soil biotic and abiotic characteristics underpinning the yield-promotion across various locations. This knowledge gap limits our capacity to harness soil microbiome to improve crop production. Here we used high-throughput amplicon sequencing to investigate the common features of bacterial community composition, ecological networks and physicochemical properties in six yield-invigorating and adjacent yield-debilitating orchards. We found that yield-invigorating soils exhibited higher contents of organic matter than yield-debilitating soils and harboured unique bacterial communities. Greater alpha diversity and higher relative abundances of Planctomycetes and Chloroflexi were observed in yield-debilitating soils. Co-occurrence network analysis revealed that yield-invigorating soils displayed a greater number of meta-modules and a higher proportion of negative links to positive links. Chloroflexi was recognized as a keystone taxon in manipulating the interaction of bacterial communities in yield-invigorating soils. Structural equation modelling showed that soil organic matter, beta diversity of bacterial community, and network connector (Chloroflexi) were key factors supporting high-yield pear production. Altogether, we provide evidence that yield-invigorating soils across a range of locations appear to share common features, including accumulation of soil organic matter, higher microbial diversity, enrichment of key taxa like Chloroflexi, and maintaining a competitive network. These findings have implications for science-based guidance for sustainable food production.

Li Wang et al.

Status: open (until 13 Nov 2021)

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Li Wang et al.

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Short summary
Yield-invigorating soils showed a higher content of organic matter and harboured unique bacterial community with greater diversity than yield-debilitating soils. And Chloroflexi was served as a keystone taxon in manipulating the interaction of bacterial community. Our findings help elucidate the role of soil microbiome in maintaining crop production and factors controlling the assembly of soil microbiome.