应用生态学报2017，Vol.28Issue(7)：2215-2221,7.DOI:10.13287/j.1001-9332.201707.002
准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化
Spatial variation of soil carbon and stable isotopes in the southern margin desert of Junggar Basin, China
摘要
Abstract
The southern margin desert of Junggar Basin in the central arid region of Asia was selected as the study area.To gain insight into the distribution characteristic of stable carbon isotope and the relationship between the change of soil carbon and the distance to oasis of soil organic carbon (SOC) and soil inorganic carbon (SIC),three belt transects were set according to the distance between the desert and the oasis in edge,middle and hinterland of the desert respectively,and collected the soil profile samples with depth of 2 m.The results indicated that the SOC content reduced with the soil depth,and the variation with the distance to oasis was the edge＞ the middle＞ the hinterland.The δ13C value of SOC varied in the range of-21.92‰ to-17.41‰,and decreased with the depth;the range in the middle and hinterland was-25.20‰ to-19.30‰,and increased then declined with the depth.Therefore,we could infer that the C3 plants played a dominant role in the central of desert,and had experienced the succession from C3 plants to C4 plants.The average content of SIC was 38.98 g · kg-1 in the edge of desert,which was about 6.01 folds as large as the content in the hinterland.This indicated that a large number of SIC with 0-2 m depth were clustered in the edge of the desert.The δ13C value of SIC increased first then decreased with the soil depth,and enriched in the bottom layer,which was mainly affected by the original carbonate content and soil carbon dioxide.关键词
土壤有机碳/土壤无机碳/δ13C值/碳稳定同位素/准噶尔盆地Key words
soil organic carbon/soil inorganic carbon/δ13C value/carbon stable isotope/Junggar Basin引用本文复制引用
王娜,许文强,徐华君,冯异星,李超凡..准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化[J].应用生态学报,2017,28(7):2215-2221,7.基金项目
本文由国家自然科学基金项目(41271323)和中国科学院特色研究所主要服务项目(TSS-2015-014-FW-5-2)资助 This work was supported by the National Natural Science Foundation of China (41271323) and the Key Service Project for the Characteristic Institute of Chinese Academy of Sciences (TSS-2015-014-FW-5-2). （41271323）
