干旱区生态环境知识资源中心(Arid): 基于稳定氢氧同位素的胡杨与柽柳幼苗水分来源研究

Arid

	基于稳定氢氧同位素的胡杨与柽柳幼苗水分来源研究
其他题名	Study on the Water Source of Populus euphratica Seedling and Tamarix ramosissimaSeedling Based on Stable Hydrogen and Oxygen Isotope Technology
	周天河; 赵成义; 俞永祥; 吴桂林; 王丽娟
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:4 页码:241-246
中文摘要	通过测定不同地下水埋深下胡杨和柽柳的幼苗茎干水和各潜在水源(土壤水、地下水)的deltaD和 delta~(18)O同位素组成特征,利用IsoSource模型和平均深度模型,研究了胡杨和柽柳的幼苗对各潜在水源的利用比例和根系吸水的平均土壤深度。结果表明,单一种植条件下胡杨和柽柳的幼苗具有相似的水分利用特征,在30,80cm地下水埋深下深层土壤水和地下水是其主要水分来源,利用比例超过80%;在130,180cm地下水埋深下浅层土壤水为其主要水源,直接利用地下水的比例很小;在180cm埋深时胡杨幼苗不能直接利用地下水,对080cm土壤水的利用比例高达79.9%,柽柳幼苗利用地下水的比例仅为12.9%,对0 80cm土壤水的利用比例达到62%;混合种植下对水分的竞争作用使柽柳幼苗主要利用深层土壤水和地下水,胡杨幼苗主要利用浅层土壤水;柽柳幼苗利用水分的平均深度显著深于胡杨幼苗,表明柽柳对干旱环境的适应能力优于胡杨。
英文摘要	In order to investigate the water uptake of seedlings of Populus euphratica and Tamarix ramosissima along the depth of groundwater,apot experiment with 4 different groundwater depth(30 cm,80 cm,130 cm and 180 cm)treatments was conducted to study the probable contributions of potential water sources to total plant water uptake and the mean soil depth of water uptake by seedlings of Populus euphraticaand Tamarix ramosissima,through measuring the deltaD and delta~(18)O compositions of the stem water and potential water sources(soil water and groundwater)of seedlings and using the IsoSource model and the model of the mean depth of plant water uptake.The results showed that the rate of water uptake was similar for Populus euphraticaand Tamarix ramosissimaseedlings when the 2 plant species were cultivated alone.When the groundwater levels were 30 cm and 80 cm,deep soil water and groundwater were the main water sources of Populus euphratica and Tamarix ramosissima seedlings,with the utilization proportion exceeding 80%.When the groundwater levels were 130 cm and 180 cm,Populus euphraticaand Tamarix ramosissimaseedlings started to use shallow soil water primarily and the utilization proportion of groundwater was very low for the 2 plant species.Populus euphratica seedlings could not use groundwater directly when the groundwater level was 180 cm,and obtained 79.9% of its water from the 080 cm soil layer.Tamarix ramosissima seedlings obtained 12.9% and 62% of its water from groundwater and the 080 cm soil layer,respectively.When Populus euphraticaseedlings and Tamarix ramosissimaseedlings were planted together,their water-use strategies were changed due to the competition for water.Tamarix ramosissima seedlings mainly used deep soil water and groundwater,while Populus euphratica seedlings mainly used shallow soil water.These results suggested that Tamarix ramosissima was much easier to adapt the drought environment than Populus euphraticain the arid region.
中文关键词	地下水 ; 稳定同位素 ; 水分来源 ; 胡杨幼苗 ; 柽柳幼苗
英文关键词	groundwater stable isotopes water sources Populus euphratica seedling Tamarix ramosissima seedling
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:5505514
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233355
作者单位	中国科学院新疆生态与地理研究所, 中国科学院绿洲生态与荒漠环境重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	周天河,赵成义,俞永祥,等. 基于稳定氢氧同位素的胡杨与柽柳幼苗水分来源研究[J]. 中国科学院新疆生态与地理研究所,2015,29(4):241-246.
APA	周天河,赵成义,俞永祥,吴桂林,&王丽娟.(2015).基于稳定氢氧同位素的胡杨与柽柳幼苗水分来源研究.水土保持学报,29(4),241-246.
MLA	周天河,et al."基于稳定氢氧同位素的胡杨与柽柳幼苗水分来源研究".水土保持学报 29.4(2015):241-246.