干旱区生态环境知识资源中心(Arid): 干旱区植物用水对水文条件的响应-以额济纳三角洲胡杨为例

Arid

	干旱区植物用水对水文条件的响应-以额济纳三角洲胡杨为例
其他题名	The response of plant water use strategy to hydrological conditions in arid areas:A case study of Populus euphratica in Ejina Delta
	陆凯; 于静洁; 王平; 李亚飞; 李蓓
来源期刊	南水北调与水利科技
ISSN	1672-1683
出版年	2017
卷号	15 期号:1 页码:88-94,172
中文摘要	植物用水对水文条件的响应是干旱区生态水文学的重点研究内容。本研究以额济纳三角洲为研究区,选取水文条件不同的典型河岸带植物胡杨(Populus euphratica)为研究对象,同步采集其根茎及可能为植物提供水分的土壤并真空抽提水分,同时采集河水和地下水水样,通过delta~(18) O分析潜在供水水源(河水、地下水)-土壤水-植物水之间的水分响应关系。研究发现,对于距离过水河道75 m(地下水位埋深2.0 m)的胡杨,其主要土壤供水层在1.0~ 2.0 m,植物水分有93.7%来自河水;而距离过水主河道2 km以外(地下水位埋深3.3 m)的胡杨,主要吸收1.4~ 3.2 m的土壤层水分,地下水(由河水补给,但在含水层停留时间较长的河水)对胡杨水分的贡献比例达到80.0%。可见,胡杨用水策略与模式受其距过水河道远近、地下水位深浅影响明显。
英文摘要	The response of plant water use strategy to hydrological conditions is important for eco-hydrological research in arid areas.In the present paper,we studied a typical riparian plant,Populus euphratica,under different hydrological conditions in Ejina delta.We simultaneously collected samples of the plants’xylem as well as the surrounding soil and extracted their water wi th a cryogenic vacuum extraction system.Meanwhile,we collected river water and groundwater samples.Thedelta~(18) O of these samples were tested to analyze the relationship between potential water sources(river water,groundwater),soil water,and plant water by the isotopic mass balance model.The results indicated that the Populus euphratica that stands 75 maway from riverbank wi th a 2 m-deep water table mainly consumes water from the 1.0~2.0 mdeep soil layer and 93.7%of the plant water is from the river.The Populus euphratica that stands 2 km away from riverbank wi th a 3.3 m-deep water table mainly absorbs soil water that is 1.4~3.2 mdeep,and ultimately 80.0%of the plant water comes from groundwater(river water that stays long in the aquifer).It can be seen that the water use strategy of Populus euphratica varies significantly wi th their distance from river- bank and groundwater table dep th.
中文关键词	干旱区 ; 水文条件 ; 胡杨 ; 水分来源
英文关键词	~(18) O arid area ~(18) O hydrological conditionPopulus euphratica water sources
语种	中文
国家	中国
收录类别	CSCD
WOS类目	SOCIOLOGY
WOS研究方向	Sociology
CSCD记录号	CSCD:5922833
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/2XILL650/236287
作者单位	中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	陆凯,于静洁,王平,等. 干旱区植物用水对水文条件的响应-以额济纳三角洲胡杨为例[J]. 中国科学院地理科学与资源研究所,2017,15(1):88-94,172.
APA	陆凯,于静洁,王平,李亚飞,&李蓓.(2017).干旱区植物用水对水文条件的响应-以额济纳三角洲胡杨为例.南水北调与水利科技,15(1),88-94,172.
MLA	陆凯,et al."干旱区植物用水对水文条件的响应-以额济纳三角洲胡杨为例".南水北调与水利科技 15.1(2017):88-94,172.