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Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity

Strategies to reduce carbon emissions have been a hotspot in sustainable agriculture production. The delayed N fertilizer application had the potential to reduce carbon emissions in pea (Pisum sativum L.)/maize (Zea mays L.) intercropping, but its microbial mechanism remains unclear. In this study,...

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Autores principales: Xu, Ke, Hu, Falong, Fan, Zhilong, Yin, Wen, Niu, Yining, Wang, Qiming, Chai, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9539669/
https://www.ncbi.nlm.nih.gov/pubmed/36212819
http://dx.doi.org/10.3389/fmicb.2022.1002009
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author Xu, Ke
Hu, Falong
Fan, Zhilong
Yin, Wen
Niu, Yining
Wang, Qiming
Chai, Qiang
author_facet Xu, Ke
Hu, Falong
Fan, Zhilong
Yin, Wen
Niu, Yining
Wang, Qiming
Chai, Qiang
author_sort Xu, Ke
collection PubMed
description Strategies to reduce carbon emissions have been a hotspot in sustainable agriculture production. The delayed N fertilizer application had the potential to reduce carbon emissions in pea (Pisum sativum L.)/maize (Zea mays L.) intercropping, but its microbial mechanism remains unclear. In this study, we investigated the effects of delayed N fertilizer application on CO(2) emissions and soil microbial diversity in pea/maize intercropping. The soil respiration (Rs) rates of intercropped pea and intercropped maize were decreased by 24.7% and 25.0% with delayed application of N fertilizer, respectively. The total carbon emissions (TCE) of the pea/maize intercropping system were also decreased by 21.1% compared with that of the traditional N fertilizer. Proteobacteria, Bacteroidota, and Chloroflexi were dominant bacteria in pea and maize strips. Heatmap analysis showed that the soil catalase activity at the pea flowering stage and the soil [Formula: see text] at the maize silking stage contributed more to the variations of bacterial relative abundances than other soil properties. Network analysis demonstrated that Rs was positively related to the relative abundance of Proteobacteria and Bacteroidota, while negatively related to the relative abundance of Chloroflexi in the pea/maize intercropping system. Overall, our results suggested that the delayed application of N fertilizer combined with the pea/maize intercropping system altered soil bacterial community diversity, thereby providing novel insights into connections between soil microorganisms and agricultural carbon emissions.
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spelling pubmed-95396692022-10-08 Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity Xu, Ke Hu, Falong Fan, Zhilong Yin, Wen Niu, Yining Wang, Qiming Chai, Qiang Front Microbiol Microbiology Strategies to reduce carbon emissions have been a hotspot in sustainable agriculture production. The delayed N fertilizer application had the potential to reduce carbon emissions in pea (Pisum sativum L.)/maize (Zea mays L.) intercropping, but its microbial mechanism remains unclear. In this study, we investigated the effects of delayed N fertilizer application on CO(2) emissions and soil microbial diversity in pea/maize intercropping. The soil respiration (Rs) rates of intercropped pea and intercropped maize were decreased by 24.7% and 25.0% with delayed application of N fertilizer, respectively. The total carbon emissions (TCE) of the pea/maize intercropping system were also decreased by 21.1% compared with that of the traditional N fertilizer. Proteobacteria, Bacteroidota, and Chloroflexi were dominant bacteria in pea and maize strips. Heatmap analysis showed that the soil catalase activity at the pea flowering stage and the soil [Formula: see text] at the maize silking stage contributed more to the variations of bacterial relative abundances than other soil properties. Network analysis demonstrated that Rs was positively related to the relative abundance of Proteobacteria and Bacteroidota, while negatively related to the relative abundance of Chloroflexi in the pea/maize intercropping system. Overall, our results suggested that the delayed application of N fertilizer combined with the pea/maize intercropping system altered soil bacterial community diversity, thereby providing novel insights into connections between soil microorganisms and agricultural carbon emissions. Frontiers Media S.A. 2022-09-23 /pmc/articles/PMC9539669/ /pubmed/36212819 http://dx.doi.org/10.3389/fmicb.2022.1002009 Text en Copyright © 2022 Xu, Hu, Fan, Yin, Niu, Wang and Chai. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Xu, Ke
Hu, Falong
Fan, Zhilong
Yin, Wen
Niu, Yining
Wang, Qiming
Chai, Qiang
Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title_full Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title_fullStr Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title_full_unstemmed Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title_short Delayed application of N fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
title_sort delayed application of n fertilizer mitigates the carbon emissions of pea/maize intercropping via altering soil microbial diversity
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9539669/
https://www.ncbi.nlm.nih.gov/pubmed/36212819
http://dx.doi.org/10.3389/fmicb.2022.1002009
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