Profile distribution and accumulation characteristics of organic carbon in a karst hillslope based on particle-size fractionation and stable isotope analysis

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	Profile distribution and accumulation characteristics of organic carbon in a karst hillslope based on particle-size fractionation and stable isotope analysis
	Taoze Liu; Zhiqi Zhao; Yunchao Lang; Hu Ding
刊名	Journal of Environmental Biology
	2015
卷号	36 期号:6 页码:721-726
英文摘要	Recent studies have highlighted tight coupling between soil aggregate fractions and soil organic carbon (SOC) turnover. However, large uncertainties remain and a mechanistic understanding of geomorphic and land use change effects on carbon storage in soil is still lacking. Taking typical slope of vegetation recovery in karst area as object, the present study analyzed organic carbon content and stable carbon isotope composition (VC value) of soil organic matter in bulk and particle size separates of soil on profiles at different topographic positions. The results showed that SOC content decreased gradually in downhill direction. Organic carbon content of sandy soil (50-2000 mu m) accounted above 50% in the upper slope positions but in the middle and lower slope soil profiles, organic carbon was mainly stored in silts (2 similar to 50 mu m) and clays (<2 mu m) which belonged to stable and highly humified SOC. The composition difference of delta C-13 values in soil profiles reflected the input of plant residues and accumulation characteristics. Organic matter was deposited in different soil particle sizes owing to different degrees of decomposition. Hence, VC value can help in identifying the storage and decomposition rates of soil organic matter.
学科主题	环境地球化学
语种	英语
公开日期	2017-05-17
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6053]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Taoze Liu,Zhiqi Zhao,Yunchao Lang,et al. Profile distribution and accumulation characteristics of organic carbon in a karst hillslope based on particle-size fractionation and stable isotope analysis[J]. Journal of Environmental Biology,2015,36(6):721-726.
APA	Taoze Liu,Zhiqi Zhao,Yunchao Lang,&Hu Ding.(2015).Profile distribution and accumulation characteristics of organic carbon in a karst hillslope based on particle-size fractionation and stable isotope analysis.Journal of Environmental Biology,36(6),721-726.
MLA	Taoze Liu,et al."Profile distribution and accumulation characteristics of organic carbon in a karst hillslope based on particle-size fractionation and stable isotope analysis".Journal of Environmental Biology 36.6(2015):721-726.