Effects of organic fertilization on functional microbial communities associated with greenhouse gas emissions in paddy soils

Soil microbial communities play a key role in the biochemical processes and nutrient cycles of the soil ecosystem and their byproducts, including greenhouse gases (GHGs). Organic fertilization influences bacterial soil biodiversity and is an essential emission source of GHGs in paddy soil ecosystems...

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Published in:Environmental research 2022-10, Vol.213, p.113706-113706, Article 113706
Main Authors: You, Xinxin, Wang, Sheng, Du, Linna, Wu, Huan, Wei, Yi
Format: Article
Language:English
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Greenhouse gas emissions
Methanogenic communities
Nitrifying bacterial communities
Organic fertilization
Paddy soils
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Wang, Sheng
Du, Linna
Wu, Huan
Wei, Yi
description Soil microbial communities play a key role in the biochemical processes and nutrient cycles of the soil ecosystem and their byproducts, including greenhouse gases (GHGs). Organic fertilization influences bacterial soil biodiversity and is an essential emission source of GHGs in paddy soil ecosystems. However, the impact of organic fertilization on the functional microorganisms associated with the GHGs methane and nitrous oxide remains unknown. We conducted paddy soil field experiments under three different treatments (no fertilization, base fertilization, and organic fertilization) to investigate the contribution of organic fertilization to soil nutrients and the functional microorganisms associated with GHG emissions. We found that organic fertilization effectively increased the soil organic matter (P 
doi_str_mv 10.1016/j.envres.2022.113706
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Organic fertilization influences bacterial soil biodiversity and is an essential emission source of GHGs in paddy soil ecosystems. However, the impact of organic fertilization on the functional microorganisms associated with the GHGs methane and nitrous oxide remains unknown. We conducted paddy soil field experiments under three different treatments (no fertilization, base fertilization, and organic fertilization) to investigate the contribution of organic fertilization to soil nutrients and the functional microorganisms associated with GHG emissions. We found that organic fertilization effectively increased the soil organic matter (P &lt; 0.001), soil organic carbon (P &lt; 0.001), and total nitrogen (P &lt; 0.05) as well as the richness (operational taxonomic units and abundance-based coverage estimators) of the methanogenic communities. Correlation analyses showed that methanogenic communities that were present in abundance were more vulnerable to perturbations in soil properties compared to nitrifying bacterial communities. Partial least squares path model analyses elucidated that organic fertilization directly affected both methanogenic communities and nitrifying bacterial communities (P &lt; 0.05), thereby accelerating methane emissions. Strong co-occurrence networks were observed within the soil-dominant phyla Acidobacteria, Bacteroidetes, and Proteobacteria. Our findings highlight the impact of organic fertilization on soil nutrients and functional microorganisms and guide mitigating GHG emissions from paddy soil agroecosystems. 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Correlation analyses showed that methanogenic communities that were present in abundance were more vulnerable to perturbations in soil properties compared to nitrifying bacterial communities. Partial least squares path model analyses elucidated that organic fertilization directly affected both methanogenic communities and nitrifying bacterial communities (P &lt; 0.05), thereby accelerating methane emissions. Strong co-occurrence networks were observed within the soil-dominant phyla Acidobacteria, Bacteroidetes, and Proteobacteria. Our findings highlight the impact of organic fertilization on soil nutrients and functional microorganisms and guide mitigating GHG emissions from paddy soil agroecosystems. 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Correlation analyses showed that methanogenic communities that were present in abundance were more vulnerable to perturbations in soil properties compared to nitrifying bacterial communities. Partial least squares path model analyses elucidated that organic fertilization directly affected both methanogenic communities and nitrifying bacterial communities (P &lt; 0.05), thereby accelerating methane emissions. Strong co-occurrence networks were observed within the soil-dominant phyla Acidobacteria, Bacteroidetes, and Proteobacteria. Our findings highlight the impact of organic fertilization on soil nutrients and functional microorganisms and guide mitigating GHG emissions from paddy soil agroecosystems. 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subjects Greenhouse gas emissions
Methanogenic communities
Nitrifying bacterial communities
Organic fertilization
Paddy soils
title Effects of organic fertilization on functional microbial communities associated with greenhouse gas emissions in paddy soils
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