Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China

Introduction: To generate information for the effective management of soil organic carbon (SOC) sequestration in Chinese croplands, we compared the additional organic carbon (C) that can be stabilized by fine soil particles (<20 μm) with typical fertilization practices across soil types and clima...

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Autores principales:	Jiaying Di, Wenting Feng, Wenju Zhang, Andong Cai, Minggang Xu
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2017
Materias:	Stable organic carbon saturation deficit manure amendment fertilization long-term study paddy soil texture Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/8e9b993ec9914254929083a6ebca347a
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spelling	oai:doaj.org-article:8e9b993ec9914254929083a6ebca347a2021-12-02T14:20:58ZSoil organic carbon saturation deficit under primary agricultural managements across major croplands in China2096-41292332-887810.1080/20964129.2017.1364047https://doaj.org/article/8e9b993ec9914254929083a6ebca347a2017-07-01T00:00:00Zhttp://dx.doi.org/10.1080/20964129.2017.1364047https://doaj.org/toc/2096-4129https://doaj.org/toc/2332-8878Introduction: To generate information for the effective management of soil organic carbon (SOC) sequestration in Chinese croplands, we compared the additional organic carbon (C) that can be stabilized by fine soil particles (<20 μm) with typical fertilization practices across soil types and climate zones. Using data from 30 long-term experimental study sites across the major agricultural zones in China, we estimated stable SOC saturation deficit (SOCdeficit) under no fertilization (CK), chemical fertilization (CF), straw plus CF (S + CF), and manure plus CF (M + CF). Stable SOCdeficit was defined as the difference between potential and current SOC stabilized by fine soil particles. Outcomes: Stable SOCdeficit values varied from 51% to 82%. Soils dominated by 2:1 clay minerals showed larger stable SOCdeficit than soils dominated by 1:1 clay minerals under each treatment. For soils dominated by 2:1 clay minerals, stable SOCdeficit was significantly lower under M + CF (69%) than under CK, CF, and S + CF (78–82%) treatments, and it increased with increasing mean annual temperature (<10°C). In soils dominated by 1:1 clay minerals, stable SOCdeficit was considerably lower in paddy and paddy-upland than in upland soils, suggesting that paddies effectively stabilize C inputs. Discussion: Agricultural soils in China have considerable C sequestration potential, despite decades of fertilization practices. To manage soil C sequestration and model soil C dynamics effectively, factors such as soil mineral types, fertilization, and cropland use should be considered. Conclusion: Our results demonstrated that manure addition was the best fertilization method for improving soil fertility, whereas straw return in Chinese croplands should take into account climate mitigation in future.Jiaying DiWenting FengWenju ZhangAndong CaiMinggang XuTaylor & Francis GrouparticleStable organic carbon saturation deficitmanure amendmentfertilizationlong-term studypaddysoil textureEcologyQH540-549.5ENEcosystem Health and Sustainability, Vol 3, Iss 7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Stable organic carbon saturation deficit manure amendment fertilization long-term study paddy soil texture Ecology QH540-549.5
spellingShingle	Stable organic carbon saturation deficit manure amendment fertilization long-term study paddy soil texture Ecology QH540-549.5 Jiaying Di Wenting Feng Wenju Zhang Andong Cai Minggang Xu Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
description	Introduction: To generate information for the effective management of soil organic carbon (SOC) sequestration in Chinese croplands, we compared the additional organic carbon (C) that can be stabilized by fine soil particles (<20 μm) with typical fertilization practices across soil types and climate zones. Using data from 30 long-term experimental study sites across the major agricultural zones in China, we estimated stable SOC saturation deficit (SOCdeficit) under no fertilization (CK), chemical fertilization (CF), straw plus CF (S + CF), and manure plus CF (M + CF). Stable SOCdeficit was defined as the difference between potential and current SOC stabilized by fine soil particles. Outcomes: Stable SOCdeficit values varied from 51% to 82%. Soils dominated by 2:1 clay minerals showed larger stable SOCdeficit than soils dominated by 1:1 clay minerals under each treatment. For soils dominated by 2:1 clay minerals, stable SOCdeficit was significantly lower under M + CF (69%) than under CK, CF, and S + CF (78–82%) treatments, and it increased with increasing mean annual temperature (<10°C). In soils dominated by 1:1 clay minerals, stable SOCdeficit was considerably lower in paddy and paddy-upland than in upland soils, suggesting that paddies effectively stabilize C inputs. Discussion: Agricultural soils in China have considerable C sequestration potential, despite decades of fertilization practices. To manage soil C sequestration and model soil C dynamics effectively, factors such as soil mineral types, fertilization, and cropland use should be considered. Conclusion: Our results demonstrated that manure addition was the best fertilization method for improving soil fertility, whereas straw return in Chinese croplands should take into account climate mitigation in future.
format	article
author	Jiaying Di Wenting Feng Wenju Zhang Andong Cai Minggang Xu
author_facet	Jiaying Di Wenting Feng Wenju Zhang Andong Cai Minggang Xu
author_sort	Jiaying Di
title	Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
title_short	Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
title_full	Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
title_fullStr	Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
title_full_unstemmed	Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China
title_sort	soil organic carbon saturation deficit under primary agricultural managements across major croplands in china
publisher	Taylor & Francis Group
publishDate	2017
url	https://doaj.org/article/8e9b993ec9914254929083a6ebca347a
work_keys_str_mv	AT jiayingdi soilorganiccarbonsaturationdeficitunderprimaryagriculturalmanagementsacrossmajorcroplandsinchina AT wentingfeng soilorganiccarbonsaturationdeficitunderprimaryagriculturalmanagementsacrossmajorcroplandsinchina AT wenjuzhang soilorganiccarbonsaturationdeficitunderprimaryagriculturalmanagementsacrossmajorcroplandsinchina AT andongcai soilorganiccarbonsaturationdeficitunderprimaryagriculturalmanagementsacrossmajorcroplandsinchina AT minggangxu soilorganiccarbonsaturationdeficitunderprimaryagriculturalmanagementsacrossmajorcroplandsinchina
_version_	1718391560702263296

Soil organic carbon saturation deficit under primary agricultural managements across major croplands in China

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