Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China

Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China

Abstract Integrated rice–crayfish farming system is a highly efficient artificial ecosystem in which the rice (Oryza sativa) variety ‘Jianzhen 2′ is cultivated in waterlogged paddy fields along with crayfish (Procambarus clarkii). We investigated soil carbon fractions and microbial community structu...

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Autores principales: Guohan Si, Chenglin Peng, Jiafu Yuan, Xiangyu Xu, Shujun Zhao, Dabing Xu, Jinshui Wu
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
Materias:
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Science
Q
Acceso en línea:https://doaj.org/article/20124e493f70482aa0b09b024c991158
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spelling oai:doaj.org-article:20124e493f70482aa0b09b024c9911582021-12-02T16:07:59ZChanges in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China10.1038/s41598-017-02984-72045-2322https://doaj.org/article/20124e493f70482aa0b09b024c9911582017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02984-7https://doaj.org/toc/2045-2322Abstract Integrated rice–crayfish farming system is a highly efficient artificial ecosystem in which the rice (Oryza sativa) variety ‘Jianzhen 2′ is cultivated in waterlogged paddy fields along with crayfish (Procambarus clarkii). We investigated soil carbon fractions and microbial community structure by phospholipid fatty acids (PLFA) analysis in a 10-year field experiment using an integrated rice–crayfish (CR) model and a rice monoculture (MR) model at soil depths of 0–10 cm, 10–20 cm, 20–30 cm, and 30–40 cm. Compared with the MR model, the CR model had significantly more total organic carbon, particulate organic carbon, and dissolved organic carbon contents in all of the layers examined and microbial biomass carbon content in the 20–40 cm layer. Principal components analysis revealed that microbial community composition in the CR model differed from that in the MR model in the 20–30 cm layer. Higher proportions of gram–negative bacteria, aerobic bacteria and fungi in the 20–30 cm soil layer were observed for the CR model than the MR model. These results indicate that the CR model increases soil carbon levels, and strongly affects microbial community composition and structure in the deeper layers of soil, thereby accelerating subsurface soil nutrient cycling.Guohan SiChenglin PengJiafu YuanXiangyu XuShujun ZhaoDabing XuJinshui WuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Guohan Si
Chenglin Peng
Jiafu Yuan
Xiangyu Xu
Shujun Zhao
Dabing Xu
Jinshui Wu
Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
description Abstract Integrated rice–crayfish farming system is a highly efficient artificial ecosystem in which the rice (Oryza sativa) variety ‘Jianzhen 2′ is cultivated in waterlogged paddy fields along with crayfish (Procambarus clarkii). We investigated soil carbon fractions and microbial community structure by phospholipid fatty acids (PLFA) analysis in a 10-year field experiment using an integrated rice–crayfish (CR) model and a rice monoculture (MR) model at soil depths of 0–10 cm, 10–20 cm, 20–30 cm, and 30–40 cm. Compared with the MR model, the CR model had significantly more total organic carbon, particulate organic carbon, and dissolved organic carbon contents in all of the layers examined and microbial biomass carbon content in the 20–40 cm layer. Principal components analysis revealed that microbial community composition in the CR model differed from that in the MR model in the 20–30 cm layer. Higher proportions of gram–negative bacteria, aerobic bacteria and fungi in the 20–30 cm soil layer were observed for the CR model than the MR model. These results indicate that the CR model increases soil carbon levels, and strongly affects microbial community composition and structure in the deeper layers of soil, thereby accelerating subsurface soil nutrient cycling.
format article
author Guohan Si
Chenglin Peng
Jiafu Yuan
Xiangyu Xu
Shujun Zhao
Dabing Xu
Jinshui Wu
author_facet Guohan Si
Chenglin Peng
Jiafu Yuan
Xiangyu Xu
Shujun Zhao
Dabing Xu
Jinshui Wu
author_sort Guohan Si
title Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
title_short Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
title_full Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
title_fullStr Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
title_full_unstemmed Changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical China
title_sort changes in soil microbial community composition and organic carbon fractions in an integrated rice–crayfish farming system in subtropical china
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/20124e493f70482aa0b09b024c991158
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AT chenglinpeng changesinsoilmicrobialcommunitycompositionandorganiccarbonfractionsinanintegratedricecrayfishfarmingsysteminsubtropicalchina
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