干旱区生态环境知识资源中心(Arid): 青藏高原样带高寒生态系统土壤有机碳分布及其影响因子

Arid

	青藏高原样带高寒生态系统土壤有机碳分布及其影响因子
其他题名	Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect
	田玉强 1; 欧阳华 1; 宋明华 1; 牛海山 2; 胡启武 1
ISSN	1008-9209
出版年	2007
卷号	33 期号:4 页码:443-449
中文摘要	沿青藏公路,以跨越山地荒漠、高寒草甸-草原和山地灌丛-针叶林等地带的样带为研究区域,在23个样点采集土样分析土壤有机碳(SOC)分布及其影响因子.结果表明,在样带水平方向,不同植被下整个剖面的SOC含量从高到低依次是森林＞灌丛＞草甸＞草原＞荒漠;在垂直方向上,森林、灌丛和草甸植被0～10 cm土层SOC含量、草原植被20 cm以上土层SOC含量皆显著高于其下各层,荒漠植被各土层SOC含量分布均一.灰色关联度分析表明;降水是影响样带内SOC分布的主导气候因子,随样带内水热条件的改善,降水对SOC分布的影响逐渐降低;降水和土壤粘粒对表层SOC分布的影响较大,土壤粉粒和砂粒对底层SOC分布影响明显.土壤容重和pH对SOC沿剖面分布的影响逐渐降低;植被生物量是影响不同植被下SOC分布的重要生物因子.
英文摘要	The undisturbed regions along the Qinghai-Tibet road crossing the natural zones of montane desert, alpine meadow-steppe, and rnontEine shrub-coniferous forest were chosen as study area. Soil samples were collected at 23 places and the relations between the influencing factors and distribution of soil organic carbon (SOC) content were studied. The results indicated that the orders of SOC content for the whole soil profile in different vegetation, in the horizontal direction, were showed as below: forest> shrub>meadow> steppe> desert; all the SOC contents of upper 10 cm soil layers in vegetations of forest, shrub and meadow, as well as that of upper 20 cm soil layers in steppe, in the vertical direction, were higher than that of corresponding lower soil layers. However, the SOC content in desert was uniform. The grey correlative analysis between the climatic factors and SOC content in upper part soil showed that the precipitation was the dominant climatic factor affecting the distribution of SOC on the Tibetan Plateau transect. The influence of precipitation on the horizontal distribution of SOC decreases asthe increase of precipitation in the horizontal direction. The vertical distribution of SOC along soil profile was greatly affected by precipitation or soil clay content in upper part of soil, as well as was clearly influenced by soil silt content or sand content in lower part of soil. The influences of both soil bulk density and soil pH on the vertical distribution of SOC along soil profile declined gradually. The plant biomasK was the most important biotic factor affecting the distribution of SOC.
中文关键词	青藏高原 ; 样带 ; 高寒生态系统 ; 土壤有机碳 ; 影响因子
英文关键词	Tibetan Plateau transect alpine ecosystem soil organic carbon influencing factors
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:2912436
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221712
作者单位	1.中国科学院,地理科学与资源研究所, 北京 100101, 中国; 2.中国科学院,研究生院, 北京 100039, 中国
推荐引用方式 GB/T 7714	田玉强,欧阳华,宋明华,等. 青藏高原样带高寒生态系统土壤有机碳分布及其影响因子[J]. 中国科学院地理科学与资源研究所,2007,33(4):443-449.
APA	田玉强,欧阳华,宋明华,牛海山,&胡启武.(2007).青藏高原样带高寒生态系统土壤有机碳分布及其影响因子.,33(4),443-449.
MLA	田玉强,et al."青藏高原样带高寒生态系统土壤有机碳分布及其影响因子".33.4(2007):443-449.