干旱区生态环境知识资源中心(Arid): 胡杨(Populus euphratica)蒸腾耗水对小降雨事件的响应

Arid

	胡杨(Populus euphratica)蒸腾耗水对小降雨事件的响应
其他题名	Responses of Transpiration of Populus euphraticato Small Rainfall Events in Desert Riparian Forest
	赵春彦; 司建华; 冯起; 鱼腾飞; 李培都
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2017
卷号	37 期号:5 页码:942-949
中文摘要	利用内蒙古额济纳旗19602010年逐日降水量观测资料,并连续监测了20122013年胡杨蒸腾速率和实时降水量,研究了小降雨事件对荒漠河岸林胡杨蒸腾耗水的影响。结果表明:50年来额济纳旗小降雨事件占总降雨事件的比例达90.63%。不同量级的小降雨事件对蒸腾速率的影响存在较大差异,小于1mm的降雨发生前蒸腾速率处于下降趋势,降雨发生后蒸腾速率的下降幅度变小,2h后开始缓慢上升;1~4mm降雨发生前蒸腾速率呈大幅下降趋势,降雨发生后1~2h蒸腾速率基本不变,降雨发生3~4h后蒸腾速率显著上升。小降雨事件对胡杨蒸腾耗水量的影响存在明显的时滞效应,0.2mm降水发生对其后各日蒸腾耗水量影响不大,降雨发生当日蒸腾耗水量的变化仍延续前几天蒸腾耗水量的变化趋势;0.4~0.8mm降雨量发生对其后2d内胡杨蒸腾耗水量有微弱影响,对2d后的蒸腾耗水量影响不大;1~4mm降雨发生后,第1天胡杨的蒸腾耗水量显著降低,但降雨后第2天胡杨蒸腾耗水量明显增加。降雨量和蒸腾速率的指数拟合关系表明小降雨事件对降雨后4h胡杨蒸腾速率的影响最大;对降雨后1h的蒸腾速率影响较小。
英文摘要	Based on daily precipitation date of meteorological station in Ejina during 1960-2010 and transpiration of Populus euphratica were monitoring simultaneously with precipitation in 2012,2013,respectively. Responses of transpiration to small rainfall events in desert riparian forest were studied.The results show that the frequency of small rainfall events reached90.63%.The influence of small rainfall events on transpiration were changed with the mounts of rainfall.The transpiration was declined before<1 mm rainfall,but after rainfall the transpiration declined slowly,then increased after 2h.The transpiration decreased significantly before 1-4 mm rainfall,after rainfall transpiration remain unchanged at first 1-2 h,then increase quickly after 3-4 h.The effects of small rainfall events on transpiration exist time lag effect.The 0.2 mm rainfall has a little effect on transpiration,the variation trend was same as the day before rainfall.The influence of 0.4-0.8 mm rainfall was not noticeable after two days.The 1-4 mm small rainfall events have a great influence on transpiration and led to the decrease of transpiration in the first day after rainfall and led to the increase of transpiration in the second day after rainfall.transpiration of populus euphratica showed exponential correlation to small rainfall events and the influence of rainfall on transpiration was most significantly after 4 h and was not noticeable after 1 h.
中文关键词	小降雨事件 ; 蒸腾耗水 ; 胡杨 ; 荒漠河岸林
英文关键词	small rainfall events transpiration Populus euphratica desert riparian forest
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:6093702
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237140
作者单位	中国科学院西北生态环境资源研究院, 中国科学院内陆河流域生态水文重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵春彦,司建华,冯起,等. 胡杨(Populus euphratica)蒸腾耗水对小降雨事件的响应[J]. 中国科学院西北生态环境资源研究院,2017,37(5):942-949.
APA	赵春彦,司建华,冯起,鱼腾飞,&李培都.(2017).胡杨(Populus euphratica)蒸腾耗水对小降雨事件的响应.中国沙漠,37(5),942-949.
MLA	赵春彦,et al."胡杨(Populus euphratica)蒸腾耗水对小降雨事件的响应".中国沙漠 37.5(2017):942-949.