Nanobubble oxygenated increases crop production via soil structure improvement: The perspective of microbially mediated effects

Weijie Chen, Felipe Bastida, Yanzheng Liu, Yunpeng Zhou, Jing He, Peng Song, Naikun Kuang and Yunkai Li

Agricultural Water Management, 2023, vol. 282, issue C

Abstract: Compaction and lack of permeability are common problems in continuously farmed soils and have a negative impact on crop yields. Regulation of the microbial community in the plant rhizosphere has been envisaged as a promising approach to alleviate these physical damages in soil. The effects of Nanobubble oxygen (NBO2) on the soil structure and the bacterial community were investigated using X-ray tomography and 16 S rRNA amplicon sequencing. The results indicated that NBO2 significantly improved the soil structure and permeability. NBO2 increased the total porosity by43.2%, from 18.74% to 26.82%, and the pore connectivity by 355.1%, from 2922 to 13301, respectively. The structural equation model (SEM) demonstrated that NBO2 had direct impacts on soil structure by increasing microbial community diversity and changing interactions among microbial species. In addition, NBO2 directly impacted the soil structure by reducing the formation of soil biofilms and the stability of soil macroaggregates. In addition, the NBO2 treatment indirectly affected the soil structure by altering the community composition and promoting the decomposition of unstable organic carbon, resulting in improved soil porosity and pore connectivity. Our results highlight the efficiency of NBO2 in improving soil structure and provide mechanistic knowledge on the microbial-mediated processes for the improvement of crop yield and quality using oxygenated drip irrigation.

Keywords: Nanobubble water irrigation; Microbial community; Soil structure; Pores; Soil fertility (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:282:y:2023:i:c:s0378377423001282

DOI: 10.1016/j.agwat.2023.108263

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