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Position: Home > Articles > Characteristics of the Canopy Interception in an Evergreen Broad-Leaved Secondary Forest in Yangdongshan, North Guangdong Scientia Silvae Sinicae 2011,47 (6) 157-161

粤北杨东山常绿阔叶次生林林冠截留特征

作  者：
邱治军;周光益;吴仲民;邹滨;罗鑫华
单  位：
中国林业科学研究院热带林业研究所;广东乐昌杨东山十二度水省级自然保护区管理处
关键词：
常绿阔叶次生林;林冠截留;水文生态效应;穿透雨;树干径流
摘  要：
林冠是森林生态系统影响降雨的第一作用层。降雨经过林冠后,被进一步分为林内穿透雨、树干径流和林冠截留。林冠的截留作用不仅改变了降雨的空间分布格局,而且影响了与之相关的物质循环和能量转换(李振新等,2004)。目前,已有大量文献报道我国热带雨林(周光益,1997;张一平等,2003)、亚热带常绿阔叶林(崔向慧等,2006)和温带落叶阔叶林(万师强等,1999)的林冠截留特征。我国主要森林生态系统的林冠截留率为11.40%～
译  名：
Characteristics of the Canopy Interception in an Evergreen Broad-Leaved Secondary Forest in Yangdongshan, North Guangdong
作  者：
Qiu Zhijun1 Zhou Guangyi1 Wu Zhongmin1 Zhou Bin2 Luo Xinhua2 (1.Research Institute of Tropical Forestry, Chinese Academy of Forestry Guangzhou 510520; 2.Yangdongshan Shierdushui Provincial Natural Reserve in Guangdong Lechang 512200)
关键词：
evergreen broad-leaved secondary forest; canopy interception; hydro-ecological effect; throughfall; stem flow
摘  要：
Throughfall, stem flow and rainfall were measured from Jul. 2009 to Sep. 2010 in an evergreen broad-leaved secondary forest in Yangdongshan, North Guangdong. The characteristics of rainfall and canopy interception of the forest were analyzed. The results indicated that the total rainfall was 2 362.6 mm during the experimental period. Rain days with 0.0-5.0 mm daily rainfall accounted for 55.2% of all rain days, but the rainfall accounted for only 8.0% of the total rainfall. However, rain amount of 10.0-25.0 mm and 25.0-50.0 mm daily rainfall accounted for 35.3% and 29.9% of the total rainfall, respectively. Throughfall, stem flow and interception were 1 837.3, 30.1, and 495.2 mm respectively, and mean throughfall rate, stem flow rate and interception rate were 77.8%, 1.3%, and 21.0% respectively. When rainfall range increased, throughfall rate also increased, but canopy interception decreased. However, with rainfall range increasing, stem flow rate increased firstly and then decreased. During the experimental period, for every rain event, the observed maximum canopy interception was 30.0 mm.

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