干旱区生态环境知识资源中心(Arid): 西藏阿里高寒荒漠区土壤有机碳含量特征

Arid

	西藏阿里高寒荒漠区土壤有机碳含量特征
其他题名	Soil organic carbon contents characteristics in the alpine desert area of Ali,Tibet,China
	刘淑娟; 魏兴琥; 郑倩倩; 林啟霞; 罗小兰; 陈毅哲; 梁钊雄; 关共凑
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2020
卷号	40 期号:4 页码:234-240
中文摘要	调查了西藏阿里高寒荒漠区30个高寒荒漠样地土壤剖面发生层,分层采集土壤样品,测定有机碳、全氮、全磷、全钾含量和粒度。结果表明:(1)阿里高寒荒漠区主要分布在海拔4 000~5 000 m的湖盆、宽谷、沟谷坡麓、冲洪积扇,土层薄、地表粗砾化、沙化严重,有机碳含量低,从亚高山草原土、高山草原土、亚高山荒漠草原土、亚高山荒漠土至高山荒漠土,土壤有机碳含量呈逐渐下降的趋势,高山草原土有机碳含量显著高于亚高山荒漠草原土、亚高山荒漠土和高山荒漠土,从草原到荒漠土壤退化明显。(2)8种植物群丛的土壤有机碳含量表现出按草原-荒漠草原-荒漠-砾漠逐渐降低的指数关系,针茅(Stipa spp.)-固沙草(Orinus thoroldii)草原和紫花针茅(Stipa purpurea)草原的土壤有机碳含量均极显著高于沙生针茅(Stipa caucasica subsp. glareosa)草原、沙蒿(Artemisia wellbyi)灌丛草原、灌木亚菊(Ajania fruticulosa)荒漠、驼绒藜(Ceratoides latens)砾漠和垫状驼绒藜(Ceratoides compacta)砾漠;沙生针茅草原、灌木亚菊荒漠、驼绒藜砾漠土壤有机碳又显著高于垫状驼绒藜砾漠。(3)土壤有机碳含量与海拔、土层厚度、表层砾石含量之间具微相关性,但随海拔升高,土壤有机碳含量降低、地表粗砾化有加重的趋势,家畜超载、野生动物数量增加造成植被退化可能是导致高寒荒漠土壤有机碳降低的主要原因。
英文摘要	Ali alpine desert zone in Qinghai-Tibet Plateau were selected as the investigation regions,vegetation and soil profiles in 30 sample plots were surveyed,soil organic carbon,size composition,and other index were measured. The results show:(1)The Ali alpine desert zone main distribute in spread over lake basin,broad valley,the foot of the slope,alluvial-proluvial fan with altitude of 4 000-5 000 m,soil there are thin soil thickness, high gravel proportion in soil surface,severe desertification and low soil organic carbon. The contents of soil organic carbon demonstrate the reduction tendency from subalpine prairie soil,alpine prairie soil,subalpine desert steppe soil,subalpine desert steppe soil to alpine desert soil. The contents of soil organic carbon had the significance reduction from alpine prairie soil to subalpine desert steppe soil,subalpine desert steppe soil,and alpine desert soil.(2)The contents of soil organic carbon in 8 kinds of plant association showed a reduction tendency from steppe to desert steppe and desert. The contents of soil organic carbon of stipa spp-Orinus thoroldii steppe and Stipa purpurea steppe higher highly significance than Stipa caucasica steppe,Artemisia wellbyi bushwood, Ajania fruticulosa desert,Ceratoides latens desert,and Ceraloides compacta desert. The contents of soil organic carbon of Stipa caucasica steppe,Ajania fruticulosa desert,Ceratoides latens desert higher significance than Krascheninnikovia compacta desert.(3)Correlation analysis of soil organic carbon with altitude,gravel concentration in surface and soil thickness showed the reducation of soil organic carbon and increase of gravel proportion in soil surface with the rise altitude. Overgraze of livestock and wild animal maybe is the principal factor that bring about vegetation degradation and lead to the reducation of soil organic carbon in alpine desert zone.
中文关键词	西藏 ; 高寒荒漠区 ; 土壤 ; 有机碳
英文关键词	Tibet alpine desert zone soil organic carbon
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6798883
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336864
作者单位	刘淑娟, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 魏兴琥, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 郑倩倩, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 林啟霞, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 罗小兰, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 陈毅哲, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 梁钊雄, 佛山科学技术学院, 佛山, 广东 528000, 中国.; 关共凑, 佛山科学技术学院, 佛山, 广东 528000, 中国.
推荐引用方式 GB/T 7714	刘淑娟,魏兴琥,郑倩倩,等. 西藏阿里高寒荒漠区土壤有机碳含量特征[J],2020,40(4):234-240.
APA	刘淑娟.,魏兴琥.,郑倩倩.,林啟霞.,罗小兰.,...&关共凑.(2020).西藏阿里高寒荒漠区土壤有机碳含量特征.中国沙漠,40(4),234-240.
MLA	刘淑娟,et al."西藏阿里高寒荒漠区土壤有机碳含量特征".中国沙漠 40.4(2020):234-240.