干旱区生态环境知识资源中心(Arid): 准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化

Arid

	准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化
其他题名	Spatial variation of soil carbon and stable isotopes in the southern margin desert of Junggar Basin,China
	王娜 1; 许文强 2; 徐华君 3; 冯异星 4; 李超凡 5
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2017
卷号	28 期号:7 页码:2215-2221
中文摘要	以亚洲中部干旱区准噶尔盆地南缘荒漠区为研究区,根据荒漠距离绿洲的距离,分别在荒漠边缘、中部和腹地设置3条样带,并采集2 m深的土壤剖面样品,研究土壤有机碳(SOC)、无机碳(SIC)含量及其稳定碳同位素的分布,探讨土壤碳变化与距绿洲距离的关系.结果表明: SOC含量随剖面土层深度增加而减少.受距绿洲距离的影响,SOC含量表现为荒漠边缘>荒漠中部>荒漠腹地.荒漠边缘SOC的delta~(13)C值范围为-21.92~ -17.41,且随深度增加而递减;荒漠中部和荒漠腹地的delta~(13)C值范围为-25.20~ -19.30,且随深度增加先增后减,由此推断准噶尔盆地南缘荒漠中部和腹地地表植被以C3植物为主,而绿洲边缘经历了从C3植物为主到C4植物为主的演替过程.荒漠边缘SIC平均含量为38.98 g·kg~(-1),是荒漠腹地的6.01倍,表明0~2 m深度内大量SIC在荒漠边缘呈聚集趋势.SIC的delta~(13)C值随深度增加先减后增,底层富集,主要受原生碳酸盐含量和剖面土壤CO_2的影响.
英文摘要	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 delta~(13)C 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 delta~(13)C 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.
中文关键词	土壤有机碳 ; 土壤无机碳 ; delta~(13)C值 ; 碳稳定同位素 ; 准噶尔盆地
英文关键词	soil organic carbon soil inorganic carbon delta~(13)C value carbon stable isotope Junggar Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6030558
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236912
作者单位	1.新疆大学资源与环境科学学院, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830046, 中国; 2.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 3.新疆大学资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国; 4.贵州省黔南州国土资源储备局, 都匀, 贵州 558000, 中国; 5.中国科学院南京土壤研究所, 南京, 江苏 210008, 中国
推荐引用方式 GB/T 7714	王娜,许文强,徐华君,等. 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]. 中国科学院新疆生态与地理研究所, 新疆大学,2017,28(7):2215-2221.
APA	王娜,许文强,徐华君,冯异星,&李超凡.(2017).准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化.应用生态学报,28(7),2215-2221.
MLA	王娜,et al."准噶尔盆地南缘荒漠区土壤碳分布及其稳定同位素变化".应用生态学报 28.7(2017):2215-2221.