Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil

Abstract Oxisol soils are widely distributed in the humid tropical and subtropical regions and are generally characterized with high contents of metal oxides. High metal oxides are believed to facilitate organic carbon (C) accumulation via mineral-organic C interactions but Oxisols often have low or...

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Autores principales:	Chenglong Ye, Tongshuo Bai, Yi Yang, Hao Zhang, Hui Guo, Zhen Li, Huixin Li, Shuijin Hu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44cb47da02f643d58c1582f2cf5ade4a
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spelling	oai:doaj.org-article:44cb47da02f643d58c1582f2cf5ade4a2021-12-02T15:05:14ZPhysical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil10.1038/s41598-017-06654-62045-2322https://doaj.org/article/44cb47da02f643d58c1582f2cf5ade4a2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06654-6https://doaj.org/toc/2045-2322Abstract Oxisol soils are widely distributed in the humid tropical and subtropical regions and are generally characterized with high contents of metal oxides. High metal oxides are believed to facilitate organic carbon (C) accumulation via mineral-organic C interactions but Oxisols often have low organic C. Yet, the causes that constrain organic C accumulation in Oxisol soil are not exactly clear. Here we report results from a microcosm experiment that evaluated how the quantity and size of crop residue fragments affect soil C retention in a typical Oxisol soil in southeast China. We found that there were significantly higher levels of dissolved organic C (DOC), microbial biomass C (MBC) and C accumulation in the heavy soil fraction in soil amended with fine-sized (<0.2 mm) compared with coarse-sized (5.0 mm) fragments. Attenuated total reflectance-Fourier transform infrared spectroscopy analysis further showed that fine-sized residues promoted stabilization of aliphatic C-H and carboxylic C=O compounds associated with mineral phases. In addition, correlation analysis revealed that the increased content of organic C in the heavy soil fraction was positively correlated with increased DOC and MBC. Together, these results suggest that enhancement of contact between organic materials and soil minerals may promote C stabilization in Oxisols.Chenglong YeTongshuo BaiYi YangHao ZhangHui GuoZhen LiHuixin LiShuijin HuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chenglong Ye Tongshuo Bai Yi Yang Hao Zhang Hui Guo Zhen Li Huixin Li Shuijin Hu Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
description	Abstract Oxisol soils are widely distributed in the humid tropical and subtropical regions and are generally characterized with high contents of metal oxides. High metal oxides are believed to facilitate organic carbon (C) accumulation via mineral-organic C interactions but Oxisols often have low organic C. Yet, the causes that constrain organic C accumulation in Oxisol soil are not exactly clear. Here we report results from a microcosm experiment that evaluated how the quantity and size of crop residue fragments affect soil C retention in a typical Oxisol soil in southeast China. We found that there were significantly higher levels of dissolved organic C (DOC), microbial biomass C (MBC) and C accumulation in the heavy soil fraction in soil amended with fine-sized (<0.2 mm) compared with coarse-sized (5.0 mm) fragments. Attenuated total reflectance-Fourier transform infrared spectroscopy analysis further showed that fine-sized residues promoted stabilization of aliphatic C-H and carboxylic C=O compounds associated with mineral phases. In addition, correlation analysis revealed that the increased content of organic C in the heavy soil fraction was positively correlated with increased DOC and MBC. Together, these results suggest that enhancement of contact between organic materials and soil minerals may promote C stabilization in Oxisols.
format	article
author	Chenglong Ye Tongshuo Bai Yi Yang Hao Zhang Hui Guo Zhen Li Huixin Li Shuijin Hu
author_facet	Chenglong Ye Tongshuo Bai Yi Yang Hao Zhang Hui Guo Zhen Li Huixin Li Shuijin Hu
author_sort	Chenglong Ye
title	Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
title_short	Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
title_full	Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
title_fullStr	Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
title_full_unstemmed	Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil
title_sort	physical access for residue-mineral interactions controls organic carbon retention in an oxisol soil
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/44cb47da02f643d58c1582f2cf5ade4a
work_keys_str_mv	AT chenglongye physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT tongshuobai physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT yiyang physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT haozhang physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT huiguo physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT zhenli physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT huixinli physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil AT shuijinhu physicalaccessforresiduemineralinteractionscontrolsorganiccarbonretentioninanoxisolsoil
_version_	1718388886870163456

Physical access for residue-mineral interactions controls organic carbon retention in an Oxisol soil

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