干旱区生态环境知识资源中心(Arid): 荒漠草原土壤有机质碳稳定同位素特征研究

Arid

	荒漠草原土壤有机质碳稳定同位素特征研究
其他题名	Research on Characteristics of Soil Stable Carbon Isotope Composition in Desertification Grassland
	张月鲜; 李素艳; 孙向阳; 张林; 郝利峰; 罗丹; 祁娜
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2011
卷号	25 期号:3 页码:164-168
中文摘要	应用碳稳定同位素分析方法对内蒙古短花针茅荒漠草原土壤有机质及其delta~(13)C值垂直分布特征、表土delta~(13)C值与建群种一短花针茅delta~(13)C值的相互关系进行分析，并测定土壤部分理化性质。结果显示:表土有机质含量变化范围为4．17～20．45 9/kg；随深度增加，土壤有机碳(SOC)含量呈指数降低，其变化范围为17．98～1．39 g/kg，而delta~(13)C值则随剖面深度增加而明显富集，到75 cm深度时delta~(13)C值又迅速降低，变化范围为--26．38～-13．72，变幅>3，说明该地区气候和植被状况可能发生过剧烈变化；表土和植物 delta~(13)C值分馏程度较其它地区偏大，二者呈极显著相关(r=0．555，P<0．01)，进一步说明地上植被状况是影响土壤有机质delta~(13)C值垂直分布特征的决定性因素。
英文摘要	Characteristics of soil stable carbon isotope composition and relationship between delta~(13)C value of soil on surface and delta~(13)C value of Stipa breviflora were analyzed by using carbon stable isotope technology in Stipa breviflora desertification grassland in Inner Mongolia,soil physical and chemical properties were also tested.The results showed that the content of soil organic carbon (SOC)of soil on surface changed between 4.17 g/kg and 20.45 g/kg; the content of SOC decreased dramatically with the increase of soil depth,it changed from 17.98 g/kg to 1.39 g/kg.However,an conspicuous enrichment of delta~(13)C value happened with the increase of soil depth until 60 cm,in the depth of 60-75 cm,delta~(13)C value dropped to -26.38%o,and the amplitude >3%o,which suggested that radical changes in climate and vegetation could have happened; the fractionation between plants and soil on surface was lager than it in other areas.Besides,a significant correlation between them was observed,and the result provided further information on that the vegetation was the decisive factor which affected the spatial distribution characteristics of delta13C value of SOC.
中文关键词	短花针茅荒漠草原 ; 土壤有机碳 ; delta~(13)C值 ; 土壤理化性质
英文关键词	Stipa breviflora desertification grassland soil organic carbon delta13 C value soil physical and chemical properties
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:4216291
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227080
作者单位	北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	张月鲜,李素艳,孙向阳,等. 荒漠草原土壤有机质碳稳定同位素特征研究[J]. 北京林业大学,2011,25(3):164-168.
APA	张月鲜.,李素艳.,孙向阳.,张林.,郝利峰.,...&祁娜.(2011).荒漠草原土壤有机质碳稳定同位素特征研究.水土保持学报,25(3),164-168.
MLA	张月鲜,et al."荒漠草原土壤有机质碳稳定同位素特征研究".水土保持学报 25.3(2011):164-168.