干旱区生态环境知识资源中心(Arid): 黑河下游荒漠河岸林不同林龄胡杨对脉冲式降雨的响应①

Arid

	黑河下游荒漠河岸林不同林龄胡杨对脉冲式降雨的响应①
其他题名	Response of Populus euphratica at Different Ages to Rainfall Pulses in the Desert Riparian Forest of the Lower Reaches of the Heihe River
	刘树宝 1; 陈亚宁2 ; 陈亚鹏 2; 李洋 3; 任志国 4
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2016
卷号	33 期号:1 页码:172-178
中文摘要	分析干旱区不同林龄胡杨对脉冲式降雨的响应,对制定气候变化下胡杨保育恢复策略具有重要意义。通过对降雨前、后黑河下游不同林龄胡杨木质部水及其不同潜在水源稳定同位素组成(deltaD、delta~(18)O)的测定,分析不同深度的土壤水、地下水和降水对胡杨水分利用的贡献比例,并结合胡杨样地土壤剖面含水量的变化,探讨降雨前、后不同林龄胡杨水分利用变化及对脉冲式降雨的响应。结果发现: ① 降雨前、后胡杨幼苗木质部的delta~(18)O值变化较大,分别为-3.498 和-7.928,而胡杨成熟木木质部的delta~(18)O值变化不大,分别为-7.202 和-7.225; ② 降雨前、后胡杨幼苗对不同水源水分利用变化较大,降雨前主要利用0~30cm的土壤水,利用比例达88% ~90%,平均值为89.9%,对地下水的利用仅为2.9%。降雨后对降水的利用最高达60%,平均值为19%; 降雨前、后胡杨成熟木都主要利用地下水和深层土壤水。
英文摘要	Stable isotopes of oxygen and hydrogen were considered to be a good tool and have been used to identify the source of water,because different source of water possess different oxygen or hydrogen isotope signatures. Until now, several approaches have been developed to quantify the contribution of different water source to plants based on the isotopic mass-balance principal. We researched the response of Populus euphratica for different ages to rainfall pulsation,playing a key role in formulating the conservation strategy of Populus euphratica under the climate change. In this study,we analyzed the soil water of different depth,groundwater and precipitation on the contribution ratio of plants,combined with the change of soil water content,discussed the response of Populus euphratica to rainfall pulsation before and after rain,based on the composition of the stable oxygen and hydrogen isotope (delta~(18)O,deltaD) of the xylem of Populus euphratica in different ages and different potential water sources in the lower reaches of the Heihe River. The results showed that: ① There were significant differences of delta18O value in the xylem of young Populus euphratica before and after rain,- 3.498 and - 7.928,but there were no significant differences of mature Populus euphratica,- 7.202 and - 7.225; ② Water source absorption ratio changes greatly of young Populus euphratica before and after rain. Before rain, the main absorption of 0 - 30 cm of soil water, the using proportion is as high as 88% - 90%, the mean value of 89.9%,only using 2.9% underground water. After the rain, the use of precipitation is up to 60%, the mean value of 19%; The main water sources of mature Populus euphratica were underground water and deep subsoil water. The depth range of the mature Populus euphratica is wider than young Populus euphratica.
中文关键词	降雨 ; 胡杨(Populus euphratica) ; 同位素 ; 黑河
英文关键词	rainfall Populus euphratica isotopes Heihe River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5623667
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/2XILL650/234282
作者单位	1.新疆环境保护科学研究院, 新疆环境污染监控与风险预警重点实验室;;荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 3.环境保护部核与辐射安全中心, 北京 100082, 中国; 4.中国科学院寒区旱区环境与工程研究所,黑河遥感试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	刘树宝,陈亚宁,陈亚鹏,等. 黑河下游荒漠河岸林不同林龄胡杨对脉冲式降雨的响应①[J]. 中国科学院新疆生态与地理研究所,2016,33(1):172-178.
APA	刘树宝,陈亚宁,陈亚鹏,李洋,&任志国.(2016).黑河下游荒漠河岸林不同林龄胡杨对脉冲式降雨的响应①.干旱区研究,33(1),172-178.
MLA	刘树宝,et al."黑河下游荒漠河岸林不同林龄胡杨对脉冲式降雨的响应①".干旱区研究 33.1(2016):172-178.