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Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates
Improving soil structure, fertility, and production is of major concern for establishing sustainable agroecosystems. Further research is needed to evaluate whether different methods of straw returning determine the variations of soil aggregation and the microbial community in aggregates in the long...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7217948/ https://www.ncbi.nlm.nih.gov/pubmed/32398757 http://dx.doi.org/10.1038/s41598-020-64857-w |
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author | Bai, Naling Zhang, Hanlin Zhou, Sheng Sun, Huifeng Zhao, Yuhua Zheng, Xianqing Li, Shuangxi Zhang, Juanqin Lv, Weiguang |
author_facet | Bai, Naling Zhang, Hanlin Zhou, Sheng Sun, Huifeng Zhao, Yuhua Zheng, Xianqing Li, Shuangxi Zhang, Juanqin Lv, Weiguang |
author_sort | Bai, Naling |
collection | PubMed |
description | Improving soil structure, fertility, and production is of major concern for establishing sustainable agroecosystems. Further research is needed to evaluate whether different methods of straw returning determine the variations of soil aggregation and the microbial community in aggregates in the long term. In this study, we comparatively investigated the effects of long-term fertilization regimes performed over six years, namely, non-fertilization (CK), chemical fertilization (CF), continuous straw return (CS), and continuous straw-derived biochar amendment (CB), on soil aggregation and bacterial communities in rice-wheat rotation systems. The results showed that straw/biochar application increased soil nutrient content and soil aggregate size distribution and stability at both 0–20 cm and 20–40 cm soil depths, compared with those of CF and CK; CB performed better than CS. CB increased bacterial community diversity and richness in 0–20 cm soil, and evenness in 0–40 cm soil (p < 0.05); CS had no significant effect on these aspects. Variations in the relative abundance of Actinobacteria, Chloroflexi, Bacteroidetes, Nitrospirae, Gemmatimonadetes, and Latescibacteria in specific aggregates confirmed the different effects of straw/biochar on bacterial community structure. The partial least squares discrimination analysis and permutation multivariate analysis of variance revealed that fertilization, aggregate size fractions, and soil depth affected the bacterial community, although their effects differed. This study suggests that CB may reduce chemical fertilizer usage and improve the sustainability of rice-wheat cropping systems over the long term, with a better overall outcome than CS. |
format | Online Article Text |
id | pubmed-7217948 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-72179482020-05-19 Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates Bai, Naling Zhang, Hanlin Zhou, Sheng Sun, Huifeng Zhao, Yuhua Zheng, Xianqing Li, Shuangxi Zhang, Juanqin Lv, Weiguang Sci Rep Article Improving soil structure, fertility, and production is of major concern for establishing sustainable agroecosystems. Further research is needed to evaluate whether different methods of straw returning determine the variations of soil aggregation and the microbial community in aggregates in the long term. In this study, we comparatively investigated the effects of long-term fertilization regimes performed over six years, namely, non-fertilization (CK), chemical fertilization (CF), continuous straw return (CS), and continuous straw-derived biochar amendment (CB), on soil aggregation and bacterial communities in rice-wheat rotation systems. The results showed that straw/biochar application increased soil nutrient content and soil aggregate size distribution and stability at both 0–20 cm and 20–40 cm soil depths, compared with those of CF and CK; CB performed better than CS. CB increased bacterial community diversity and richness in 0–20 cm soil, and evenness in 0–40 cm soil (p < 0.05); CS had no significant effect on these aspects. Variations in the relative abundance of Actinobacteria, Chloroflexi, Bacteroidetes, Nitrospirae, Gemmatimonadetes, and Latescibacteria in specific aggregates confirmed the different effects of straw/biochar on bacterial community structure. The partial least squares discrimination analysis and permutation multivariate analysis of variance revealed that fertilization, aggregate size fractions, and soil depth affected the bacterial community, although their effects differed. This study suggests that CB may reduce chemical fertilizer usage and improve the sustainability of rice-wheat cropping systems over the long term, with a better overall outcome than CS. Nature Publishing Group UK 2020-05-12 /pmc/articles/PMC7217948/ /pubmed/32398757 http://dx.doi.org/10.1038/s41598-020-64857-w Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Bai, Naling Zhang, Hanlin Zhou, Sheng Sun, Huifeng Zhao, Yuhua Zheng, Xianqing Li, Shuangxi Zhang, Juanqin Lv, Weiguang Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title | Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title_full | Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title_fullStr | Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title_full_unstemmed | Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title_short | Long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
title_sort | long-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7217948/ https://www.ncbi.nlm.nih.gov/pubmed/32398757 http://dx.doi.org/10.1038/s41598-020-64857-w |
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