干旱区生态环境知识资源中心(Arid): 阜康典型荒漠C3植物稳定碳同位素值的环境分析

Arid

	阜康典型荒漠C3植物稳定碳同位素值的环境分析
其他题名	Environmental analysis of stable carbon isotope values in typical desert C_3 plants of the fukang, xinjiang
	陈拓 1; 马健 2; 冯虎元 3; 何元庆 3; 徐世健 4; 强维亚 4; 安黎哲 3
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2002
卷号	25 期号:4 页码:342-345
中文摘要	通过对阜康典型荒漠C3植物稳定碳同位素值的分析。叶片炭同位素值在-23和-29之间变化，其中主要在-27附近波动。这与前人报道的世界上其他地区荒漠植物碳同位素值的变化非常一致。降水可以改变叶片碳同位素值的大小，降水越多，叶片碳同位素值越负，它们的变化幅度有物种的依赖性。叶片碳同位素值也受植物生长形式或期望寿命的影响，木本植物或寿命长的植物叶片碳同位素值要高。分析表明，利用该区土壤或陆相沉积中有机质碳同位素值可以判断气候的干湿变化：土壤或陆相沉积中有机质碳同位素值越高，气候则越干燥。
英文摘要	Water is usually considered to be the key limiting factor for growth of desert plants, the positive relationship between the primary productivity and rainfall is generally observed. Research in recent years has demonstrated that carbon isotope values in C_3 plants can be used as an integrated indicator of relative water use efficiency. Absolute water efficiency in desert plants is influenced during the growing season by changes in water availability and leaf-to-air water vapor gradient, and thus changes significantly between seasons. These changes affect all plant species in a community, however, and therefore the relative ranking of carbon isotope values among species provides insight into fitness components related to water use efficiency since the relative ranking of carbon isotope values among plants grown under common conditions remain constant over time. On the other hand, vegetation is sensitive to the environmental change. Under the different environmental and climatic conditions, the vegetation is different even in the same area. After died, the plant body decomposed and its residual entered into soil, which is the main source of the organic matter in soil. So, the past climatic change and the vegetation condition could be uncovered by the variation of the carbon isotope values of organic matter in soil. In the present papers, leaf carbon isotope values were measured on species occurring within a desert community at Fukang County, Xinjiang. Leaf carbon isotope values ranged from - 23.15%o to - 29.95%o, averaging .- 27. 61%o, which was broadly comparable with values reported for other desert plants in the world. Less rainfall led to higher leaf carbon isotope values, but’the magnitude of the isotope value changes depended on the species. A pattern of increasing leaf carbon isotope values with greater longevity was present. The analysis showed that the change of aridity and humidity could be disclosed by studying the carbon isotope values of soil and land sediments.
中文关键词	荒漠C3植物 ; 稳定碳同位素值 ; 降水 ; 环境信息 ; 土壤 ; 气候 ; 干湿变化 ; 红砂荒漠 ; 梭梭荒漠
英文关键词	desert C_3 plant stable carbon isotope values fukang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1072694
来源机构	中国科学院西北生态环境资源研究院 ; 兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203181
作者单位	1.中国科学院寒区旱区环境与工程研究所, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国; 2.中国科学院阜康荒漠生态系统试验站, 乌鲁木齐, 新疆 830002, 中国; 3.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 4.兰州大学生命科学学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈拓,马健,冯虎元,等. 阜康典型荒漠C3植物稳定碳同位素值的环境分析[J]. 中国科学院西北生态环境资源研究院, 兰州大学,2002,25(4):342-345.
APA	陈拓.,马健.,冯虎元.,何元庆.,徐世健.,...&安黎哲.(2002).阜康典型荒漠C3植物稳定碳同位素值的环境分析.干旱区地理,25(4),342-345.
MLA	陈拓,et al."阜康典型荒漠C3植物稳定碳同位素值的环境分析".干旱区地理 25.4(2002):342-345.