水曲柳林冠的降水截留特征  

Study on Canopy Interception of Fraxinus mandshurica

作　　者：党宏忠[1] 董铁狮[2] 赵雨森[3] 

机构地区：[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]辽宁省林业厅外资项目办公室,辽宁沈阳110036 [3]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《林业科学研究》2008年第5期657-661,共5页Forest Research

基　　金：黑龙江省重大科技攻关项目(GA02B601)资助

摘　　要：对水曲柳林冠在2003年5—9月的降水截留特征进行了野外测定与统计分析,结果表明:水曲柳林分林冠截留量为68.77mm,占同期降水量的17.41%;降水约按以下比例被再次分配:穿透降水72.50%,林冠截留17.41%,树干茎流10.08%。模拟分析结果表明:Horton改进模型模拟精度高,参数物理意义较明确,水曲柳林冠吸附容量为0.84mm,区域降雨蒸发能力的参数值为11.83%,水曲柳林冠截留率随降水变化的曲线可分为快变期(截留率大于19.0%,降水量小于10mm)、渐变期(截留率19.0%～12.8%,降水10～30mm)和稳定期(截留率小于12.8%,降水大于30mm),水曲柳林冠稳定截留率为12.8%。The relationships between canopy interception of Fraxinus mandshurica Rupr. and rainfall were studied from May to September in 2003 by surveying and statistic methods. The result showed that the canopy interception of Fraxinus mandshurica for rainfall was 68.77 mm, which accounted for 17.41% of total rainfall in the same periods. The rainfall was redistributed by the proportion of penetration 72.50%, interception 17.41% and the stem flow 10.08% ; the redistribution of rainfall by canopy could be simulated precisely by the improved Horton model , the canopy rainfall adsorption capacity of Fraxinus mandshurica was 0.84 mm. The parameter which means coefficient of evaporation of canopy regionally was 0.118 3. It was indicated that the curve of forest interception with rainfall marked 3 phase such as descent quickly phase（interception rate more than 19% while rainfall less than 10 mm）, descent gradually phase （ interception rate is in 19.0%-12.8% while rainfall 10-30 mm） and stable phase （interception rate less than 12.8% while rainfall more than 30 mm）, which could explain the relationships of interception with canopy geometry shape characteristics of Fraxinus mandshurica. The stable interception rate was 12.8%.

关 键 词：水曲柳 林冠截留 树干茎流 

分 类 号：S715.2[农业科学—林学]