干旱区生态环境知识资源中心(Arid): 半干旱岩溶区土壤次生碳酸盐比例及对岩溶碳汇计算的影响

Arid

	半干旱岩溶区土壤次生碳酸盐比例及对岩溶碳汇计算的影响
其他题名	Proportion of pedogenic carbonates and the impact on carbon sink calculation in karst area with semiarid environment
	黄奇波 1; 覃小群 2; 刘朋雨 2; 张连凯 2; 苏春田 1
来源期刊	中国岩溶
ISSN	1001-4810
出版年	2016
卷号	35 期号:2 页码:164-172
中文摘要	定量评价半干旱岩溶区土壤次生碳酸盐比例和来源有助于认识土壤系统影响岩溶作用的机理。选取山西晋中盆地西南,吕梁山东侧的半干旱岩溶区马跑神泉小流域为研究对象,通过对林地、退耕地、灌丛地土壤剖面进行分层取样并测定碳酸盐含量及其delta~(13) C、CO_2浓度及其delta~(13) C值,分析其随深度的变化规律和控制因素;并结合研究区碳酸盐岩的delta~(13) C值计算3个剖面各层土壤次生碳酸盐所占比例。研究结果表明:3个土壤剖面的碳酸盐含量、CO_2浓度在0~50cm土层随深度增加而增加,在50~70cm土层随深度增加而减少;土壤碳酸盐delta~(13) C值、delta~(13) C_(CO_2)值在0~50cm土层随深度增加而偏负,在50~70cm土层随深度增加而偏重;土壤碳酸盐含量及其delta~(13) C值主要受次生碳酸盐比例控制,而土壤CO_2及其delta~(13) C_(CO_2)值在上层主要受大气CO_2和土壤有机质分解生成的CO_2共同影响,下层还受土-岩界面岩溶作用过程制约;退耕地、林地、灌丛剖面次生碳酸盐所占比例的均值分别为52%、42%和32%,证实北方半干旱岩溶区土壤中存在原生碳酸盐向次生碳酸盐转化过程。
英文摘要	Quantitative evaluation of proportion and source of pedogenic carbonates in karst area with semiarid environment have contributed to understand the mechanism of soil system affecting karst process,which has great significance in karst carbon cycle research.Soil samples were collected from soil profile of forest land,abandoned farmland and brushland,in a typical small watershed in semi-arid area,southwest of Jinzhong basin,Shanxi Province,China,for analysis of content and delta~(13)C of soil carbonates,content and delta~(13)C of CO_2and delta~(13) C of parent rocks,hence to explore their variation with depth and controlling factors,and quantify ratio of pedogenic carbonates in soil carbon.Results show that in the upper layer(0to 50cm),the content of soil carbonates and CO_2increase with depth,while the delta~(13) C of soil carbonates and CO_2decrease with depth.In the lower layer(50-70cm),the content of soil carbonates and CO_2decrease with depth,and the delta~(13)C of soil carbonates and CO_2increase with depth.The content and delta~(13) C of soil carbonates are mainly controlled by pedogenic carbonates proportion,while the content and delta~(13) C of CO_2are mainly affected by atmospheric CO_2and soil CO_2generated by organic matter decomposition in the upper layer,and impacted by karst process in soil-rock interface in the lower layer.The average proportion of pedogenic carbonates is 52%,42%,32%for abandoned farmland,forest land and brushland,respectively.This paper confirmed that the lithogenic carbonates can transform to pedogenic carbonates in north karst area with semiarid environment.
中文关键词	岩溶碳汇 ; 碳酸盐 ; 次生碳酸盐 ; delta~(13) C值 ; 土壤CO_2
英文关键词	karst carbon sink soil carbonate pedogenic carbonates delta~(13)C value soil CO_2
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5745375
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235520
作者单位	1.(武汉)中国地质大学环境学院, 国土资源部、广西壮族自治区岩溶动力学重点实验室, 武汉, 湖北 430074, 中国; 2.中国地质科学院岩溶地质研究所, 国土资源部、广西壮族自治区岩溶动力学重点实验室, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	黄奇波,覃小群,刘朋雨,等. 半干旱岩溶区土壤次生碳酸盐比例及对岩溶碳汇计算的影响[J],2016,35(2):164-172.
APA	黄奇波,覃小群,刘朋雨,张连凯,&苏春田.(2016).半干旱岩溶区土壤次生碳酸盐比例及对岩溶碳汇计算的影响.中国岩溶,35(2),164-172.
MLA	黄奇波,et al."半干旱岩溶区土壤次生碳酸盐比例及对岩溶碳汇计算的影响".中国岩溶 35.2(2016):164-172.