干旱区生态环境知识资源中心(Arid): 柴达木盆地荒漠植物水分来源定量研究以格尔木样区为例

Arid

	柴达木盆地荒漠植物水分来源定量研究以格尔木样区为例
其他题名	Quantification analysis of water sources of desert plants in Qaidam Basin: A case study of Golmud plot
	朱建佳; 陈辉; 邢星; 陈同同
来源期刊	地理研究
ISSN	1000-0585
出版年	2015
卷号	34 期号:2 页码:285-292
中文摘要	选择柴达木盆地的格尔木作为研究区域, 选取沙拐枣、合头草、驼绒藜和麻黄4种典型的地带性荒漠灌木, 应用稳定氢氧同位素技术定量分析典型荒漠植物的水分来源。结果表明:①柴达木盆地典型荒漠植物能灵活利用各种水源(河水、地下水、降水和土壤水等), 最主要的水源是土壤水。②不同种类植物水分利用方式存在差异:驼绒藜、麻黄和沙拐枣主要利用深层土壤水和地下水, 合头草以土壤水为优势水源。③植物水分来源的时间变化为:生长季初期, 植物主要利用河水和地下水;生长季中后期, 合头草主要利用浅层土壤水, 其他3种植物主要利用较深层土壤水和地下水。
英文摘要	Arid and semiarid areas account for one-third of the total global land, and vegetation of arid and semiarid areas is crucial for relieving and improving ecological crisis. However, plant growth is often limited by available water supplies in these areas. Understanding water sources and water use patterns of desert plants contributes to provide theoretical basis for improving eco-environment of arid and semiarid areas. Plants with different life forms absorb water from different sources. When plant water sources were reduced, plant growth and distribution will be accordingly changed. Therefore, research of plant water sources will help us to figure out the spatio- temporal patterns and dynamics of plants under the background of global change. In this study, four kinds of dominant desert shrubs in Golmud plot: Calligonum mongolicum, Sympegma regelii, Ceratoides latens and Ephedra przewalskii were selected as study materials. The technique of stable hydrogen and oxygen isotopes (deltaD and delta18D) was applied to quantitatively analyze and investigate the water sources of the four typical kinds of desert plants. On the premise that precipitation, river water, groundwater and soil water were separate factors that cannot be mutely transformed, the IsoSource model was used to calculate probable contributions of potential water sources to total plant water uptake of each sampling time in growing seasons. Results showed that: (1) The typical desert plants in the Qaidam Basin could absorb all kinds of water (river water, groundwater, rainfall and soil water etc,), while the major water source was soil water. (2) The water use patterns were diverse for different desert plants: Ceratoides latens, Ephedra przewalskii and Calligonum mongolicum mainly absorbed deep soil water and groundwater, but Sympegma regelii used soil water as their main water source.(3) The water use pattern of plants varied with time. At the beginning of growth season, all kinds of plants in Golmud mainly absorbed seasonal runoff and groundwater; In the mid-to-late period of growth season, Sympegma regelii mainly absorbed shallow soil water, while the three other desert plants such as Ceratoides latens, Ephedra przewalskii and Calligonum mongolicum mainly made the deep soil water and groundwater as their main sources of water.
中文关键词	稳定氢氧同位素 ; 植物水分来源 ; 柴达木盆地
英文关键词	stable hydrogen and oxygen isotopes plant water sources Qaidam Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MULTIDISCIPLINARY SCIENCES
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5363547
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232491
作者单位	河北师范大学资源与环境科学学院, 河北省环境演变与生态建设实验室, 石家庄, 河北 050024, 中国
推荐引用方式 GB/T 7714	朱建佳,陈辉,邢星,等. 柴达木盆地荒漠植物水分来源定量研究以格尔木样区为例[J],2015,34(2):285-292.
APA	朱建佳,陈辉,邢星,&陈同同.(2015).柴达木盆地荒漠植物水分来源定量研究以格尔木样区为例.地理研究,34(2),285-292.
MLA	朱建佳,et al."柴达木盆地荒漠植物水分来源定量研究以格尔木样区为例".地理研究 34.2(2015):285-292.