The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes

Long-term fertilization alters soil microbiological properties and then affects the soil organic carbon (SOC) pool. However, the interrelations of SOC with biological drivers and their relative importance are rarely analyzed quantitatively at aggregate scale. We investigated the contribution of soil...

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Autores principales:	Jinjing Lu, Shengping Li, Guopeng Liang, Xueping Wu, Qiang Zhang, Chunhua Gao, Jianhua Li, Dongsheng Jin, Fengjun Zheng, Mengni Zhang, Ahmed Ali Abdelrhman, Aurore Degré
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fertilization soil aggregates microbial properties enzyme activity SOC Agriculture S
Acceso en línea:	https://doaj.org/article/fee144e6f9ba491fbc8e06019bd7a541
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spelling	oai:doaj.org-article:fee144e6f9ba491fbc8e06019bd7a5412021-11-25T16:03:35ZThe Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes10.3390/agronomy111121262073-4395https://doaj.org/article/fee144e6f9ba491fbc8e06019bd7a5412021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2126https://doaj.org/toc/2073-4395Long-term fertilization alters soil microbiological properties and then affects the soil organic carbon (SOC) pool. However, the interrelations of SOC with biological drivers and their relative importance are rarely analyzed quantitatively at aggregate scale. We investigated the contribution of soil microbial biomass, diversity, and enzyme activity to C pool in soil aggregate fractions (>5 mm, 2–5 mm, 1–2 mm, 0.25–1 mm, and <0.25 mm) at topsoil (0–15 cm) from a 27-year long-term fertilization regime. Compared to CK (no fertilization management), NP (inorganic fertilization alone) decreased all of the microbial groups’ biomass, while NPS and NPM (inorganic fertilization plus the incorporation of maize straw or composted cow manure) significantly reduced this negative effect of NP on microbial biomass and increased the microbial contribution to C pool. The results show that microbial variables were significantly correlated with SOC content in >0.25 mm aggregates rather than in <0.25 mm aggregates. Fungal variables (fungal, AM biomass, and F/B ratio) and enzyme activities (BXYL and LAP) in >0.25 mm aggregates explained 21% and 2% of C, respectively. Overall, organic matter addition could contribute to higher C storage by boosting fungal community and enzyme activity rather than by changing microbial community diversity in macro-aggregates.Jinjing LuShengping LiGuopeng LiangXueping WuQiang ZhangChunhua GaoJianhua LiDongsheng JinFengjun ZhengMengni ZhangAhmed Ali AbdelrhmanAurore DegréMDPI AGarticlefertilizationsoil aggregatesmicrobial propertiesenzyme activitySOCAgricultureSENAgronomy, Vol 11, Iss 2126, p 2126 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fertilization soil aggregates microbial properties enzyme activity SOC Agriculture S
spellingShingle	fertilization soil aggregates microbial properties enzyme activity SOC Agriculture S Jinjing Lu Shengping Li Guopeng Liang Xueping Wu Qiang Zhang Chunhua Gao Jianhua Li Dongsheng Jin Fengjun Zheng Mengni Zhang Ahmed Ali Abdelrhman Aurore Degré The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
description	Long-term fertilization alters soil microbiological properties and then affects the soil organic carbon (SOC) pool. However, the interrelations of SOC with biological drivers and their relative importance are rarely analyzed quantitatively at aggregate scale. We investigated the contribution of soil microbial biomass, diversity, and enzyme activity to C pool in soil aggregate fractions (>5 mm, 2–5 mm, 1–2 mm, 0.25–1 mm, and <0.25 mm) at topsoil (0–15 cm) from a 27-year long-term fertilization regime. Compared to CK (no fertilization management), NP (inorganic fertilization alone) decreased all of the microbial groups’ biomass, while NPS and NPM (inorganic fertilization plus the incorporation of maize straw or composted cow manure) significantly reduced this negative effect of NP on microbial biomass and increased the microbial contribution to C pool. The results show that microbial variables were significantly correlated with SOC content in >0.25 mm aggregates rather than in <0.25 mm aggregates. Fungal variables (fungal, AM biomass, and F/B ratio) and enzyme activities (BXYL and LAP) in >0.25 mm aggregates explained 21% and 2% of C, respectively. Overall, organic matter addition could contribute to higher C storage by boosting fungal community and enzyme activity rather than by changing microbial community diversity in macro-aggregates.
format	article
author	Jinjing Lu Shengping Li Guopeng Liang Xueping Wu Qiang Zhang Chunhua Gao Jianhua Li Dongsheng Jin Fengjun Zheng Mengni Zhang Ahmed Ali Abdelrhman Aurore Degré
author_facet	Jinjing Lu Shengping Li Guopeng Liang Xueping Wu Qiang Zhang Chunhua Gao Jianhua Li Dongsheng Jin Fengjun Zheng Mengni Zhang Ahmed Ali Abdelrhman Aurore Degré
author_sort	Jinjing Lu
title	The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
title_short	The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
title_full	The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
title_fullStr	The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
title_full_unstemmed	The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes
title_sort	contribution of microorganisms to soil organic carbon accumulation under fertilization varies among aggregate size classes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fee144e6f9ba491fbc8e06019bd7a541
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The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes

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