Sources of dissolved organic carbon in forest soils: evidences from the differences of organic carbon concentration and isotope composition studies

	Sources of dissolved organic carbon in forest soils: evidences from the differences of organic carbon concentration and isotope composition studies
	Cheng-Long Tu; Cong-Qiang Liu; Xiao-Hui Lu; Ju Yuan; Yun-Chao Lang
	2011
Source Publication	Environmental Earth Sciences
Volume	63 Issue:4 Pages:723-730
Abstract	There is considerable discussion and uncertainty in the literature regarding the importance of fresh litter versus older soil organic matter as sources of soil dissolved organic carbon (DOC) in forest floor. In this study, the differences of organic carbon concentration and stable isotope composition were analyzed under different background conditions to identify the origins of DOC in forest soil. The data show that there is no significant difference in SOC content between these collected soil samples (P[0.05), but the litter-rich surface soils have relatively higher DOC concentration than the litter-lacking (P\0.01) ones, and the d13C values of DOC (d13CDOC) are closer to d13C of litter than d13C values of SOC (d13CSOC). In the litter-lacking surface soil samples, the range of d13CDOC is between d13CSOC and d13C of dominant plant leaves. These results suggest that DOC mainly derive from litter in the litter-rich surface soil with, and the main path of DOC sources may change with surrounding conditions. In addition, d13CSOC and d13CDOC become more positive, and the absolute values of D (d13CDOC - d13CSOC) decrease with depth in the soil profiles, which indicate that the percentage of DOC below 5 cm, derived from degradation of humus, may increase with soil depth.
Subject Area	环境地球化学
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/6982
Collection	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
Recommended Citation GB/T 7714	Cheng-Long Tu,Cong-Qiang Liu,Xiao-Hui Lu,et al. Sources of dissolved organic carbon in forest soils: evidences from the differences of organic carbon concentration and isotope composition studies[J]. Environmental Earth Sciences,2011,63(4):723-730.
APA	Cheng-Long Tu,Cong-Qiang Liu,Xiao-Hui Lu,Ju Yuan,&Yun-Chao Lang.(2011).Sources of dissolved organic carbon in forest soils: evidences from the differences of organic carbon concentration and isotope composition studies.Environmental Earth Sciences,63(4),723-730.
MLA	Cheng-Long Tu,et al."Sources of dissolved organic carbon in forest soils: evidences from the differences of organic carbon concentration and isotope composition studies".Environmental Earth Sciences 63.4(2011):723-730.

Files in This Item:
File Name/Size	DocType	Version	Access	License
Sources of dissolved（574KB）			开放获取	License	View Application Full Text

File name:	Sources of dissolved organic carbon in forest soils_ evidences from the differences of organic carbon concentration and isotope composition studies.pdf
Format:	Adobe PDF

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

环境地球化学国家重点实验室知识库