文献类型：期刊文献

中文题名：华北低丘山地人工林蒸散的控制因子

英文题名：Stomatal and environmental control on evapotranspiration in a plantation in the lower mountain areas of North China

作者：黄辉[1] 孟平[1] 张劲松[1] 郑宁[1] 贾长荣[2]

第一作者：黄辉

机构：[1]中国林业科学研究院林业研究所、国家林业局林木培育重点实验室,北京100091;[2]河南省济源市国有大沟河林场,济源454650

年份：2014

卷号：34

期号：3

起止页码：667-673

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金青年基金项目(31100321);林业公益性行业科研专项课题(201104009-04)

语种：中文

中文关键词：蒸散;退耦系数;气孔运动;干旱;辐射

外文关键词：evapotranspiration ; decoupling coefficient; stomatal movement ; drought ; radiation

分类号：S791.27

摘要：人工林蒸散的影响机制研究对指导我国林业生态工程建设有重要意义。基于涡度相关技术,对华北低丘山区30年生栓皮栎-刺槐-侧柏人工混交林进行了连续2a的观测,以探讨蒸散的控制因子。结果表明:退耦系数(Ω)与冠层导度的季节动态有很好的一致性。2007、2008年的快速生长季Ω变化范围分别为0.12—0.62、0.08—0.54,平均值分别为0.37、0.23,快速生长季蒸散主要受气孔控制。2008年比2007年偏旱,该年快速生长季的退耦系数、冠层导度和蒸散低于2007年,发生干旱时蒸散主要受气孔限制。气孔对蒸散的限制作用在大气湿度较低时较高,并且这种限制作用在发生干旱时会进一步加剧。快速生长季内辐射是影响蒸散的主要环境因子,辐射资源丰富的年份气孔对蒸散的控制程度更高。
Water flux was measured continuously in fast growing season （ from June to August） in 2007 and 2008 using the eddy covariance technique in a 30-year-old mixed plantation （ Quercus variabilis, Robinia pseudoacacia and Platycladus orientalis） in a hilly area of the North China. The results showed that seasonal variation of decoupling coefficient （Ω） and canopy conductance （ gc ） had a similar pattern. Range of /2 in 2007 and 2008 were 0.12-0. 62 and 0.08-0. 54 respectively. Average values of/2 in these two years were 0.37 and 0.23. Evapotranspiration （ET） was mainly controlled by stomatal movement in fast growing season. It was dryer in 2008 than in 2007, and the averages of/2, gc and ET in 2008 were also lower than those in 2007. Stomatal control was the main impact factor on ET in drought. The restriction from stomata on ET was higher in lower atmosphere humidity, and the restriction was aggravated in drought. Radiation was the main environmental factor that affects ET in fast growing season, and drought enhanced the control of radiation on ET. Stomatal control was stronger in the year with higher radiation.