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Effects of slope position and land use on the stability of aggregate-associated organic carbon in calcareous soils
Man Liu;  Guilin Han;  Zichuan Li;  Taoze Liu;  Xiaomin Yang;  Yuntao Wu;  Zhaoliang Song
2017
Source PublicationActa Geochimica
Volume36Issue:3Pages:456–461
Abstract

Topography and land use affect soil organic carbon (SOC) storage, stabilization, and turnover, through several biogeochemical processes. This study investigated the aggregate composition and SOC content of bulk soils and aggregates at different slope positions under different land uses in a typical karst catchment of southwestern China. Our results show that the proportion of macro-aggregates and the SOC content of bulk soils and aggregates at different slope positions decreased from the upper to the lower slope. The SOC content generally increased with an increase in the mean weight diameter and proportion of macro-aggregates under different land uses. Our results indicate that macro-aggregates in forest and grassland soils make a greater contribution to both aggregate composition and SOC content than that in arable land soils. Therefore, converting farmland to forest or grassland can facilitate the accumulation of macro-aggregates as well as the storage of SOC.

KeywordSoil Organic Carbon Aggregate Fraction Land Use Slope Position Karst Southwest China
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8376
Collection环境地球化学国家重点实验室
Recommended Citation
GB/T 7714
Man Liu;Guilin Han;Zichuan Li;Taoze Liu;Xiaomin Yang;Yuntao Wu;Zhaoliang Song. Effects of slope position and land use on the stability of aggregate-associated organic carbon in calcareous soils[J]. Acta Geochimica,2017,36(3):456–461.
APA Man Liu;Guilin Han;Zichuan Li;Taoze Liu;Xiaomin Yang;Yuntao Wu;Zhaoliang Song.(2017).Effects of slope position and land use on the stability of aggregate-associated organic carbon in calcareous soils.Acta Geochimica,36(3),456–461.
MLA Man Liu;Guilin Han;Zichuan Li;Taoze Liu;Xiaomin Yang;Yuntao Wu;Zhaoliang Song."Effects of slope position and land use on the stability of aggregate-associated organic carbon in calcareous soils".Acta Geochimica 36.3(2017):456–461.
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