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DOI	10.1007/s10533-021-00813-8
	Quantitative relationship between organic carbon and geochemical properties in tropical surface and subsurface soils
	Ashida K.; Watanabe T.; Urayama S.; Hartono A.; Kilasara M.; Mvondo Ze A.D.; Nakao A.; Sugihara S.; Funakawa S.
发表日期	2021
ISSN	1682563
英文摘要	We investigated soil organic carbon (SOC) storage and the quantitative relationship between SOC and geochemical properties in tropical surface and subsurface soils, where information on various soil geochemical properties remains limited. We used soil samples from 178 sites in Indonesia, Thailand, Cameroon, and Tanzania as tropical soils and 34 sites in Japan as a comparison. The tropical soils were acidic, formed under high precipitation. We separated the soil samples into three groups based on the degree of weathering. We applied correlation and single regression analyses between SOC and geochemical properties including oxalate extractable Al and Fe (Alo + Feo), pyrophosphate extractable Al and Fe (Alp + Fep), and clay + silt. In the subsurface soils, Alo + Feo and Alp + Fep were strongly correlated with SOC (r = 0.79–0.85 and 0.58–0.85, respectively), and the quantitative relationships of SOC with these properties were similar in all the weathering groups (4–5 and 5–8, respectively). On the other hand, no strong correlation with SOC or similar quantitative relationships among the weathering groups were found for clay + silt. In the surface soils, Alo + Feo and Alp + Fep were correlated with SOC (r = 0.48–0.56 and 0.55–0.76, respectively), but the ratio of C to active Al and Fe was higher probably because of the large C input. Our results highlight the importance of Alo + Feo and Alp + Fep in SOC storage, of which the ratios to SOC are similar in each of the surface and subsurface soils regardless of the weathering degree. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
英文关键词	Active Al and Fe; Organo-mineral associations; Oxalate extraction; Pyrophosphate extraction; Soil organic carbon
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184644
作者单位	Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan; Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan; Faculty of Agriculture, IPB University, Bogor, 16680, Indonesia; College of Agriculture, Sokoine University of Agriculture, Morogoro, Tanzania; Faculté d’Agronomie et des Sciences Agricoles, Université de Dschang, Dschang, Cameroon; Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, 606-8522, Japan; Institute of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, 183-8509, Japan
推荐引用方式 GB/T 7714	Ashida K.,Watanabe T.,Urayama S.,et al. Quantitative relationship between organic carbon and geochemical properties in tropical surface and subsurface soils[J],2021.
APA	Ashida K..,Watanabe T..,Urayama S..,Hartono A..,Kilasara M..,...&Funakawa S..(2021).Quantitative relationship between organic carbon and geochemical properties in tropical surface and subsurface soils.Biogeochemistry.
MLA	Ashida K.,et al."Quantitative relationship between organic carbon and geochemical properties in tropical surface and subsurface soils".Biogeochemistry (2021).