北京山区4种优势林分生态用水实验研究  

Ecological Use of Water of Four Dominant Forests in Mountainous Area of Beijing City

作　　者：王贺年[1] 余新晓[1] 赵阳[1] 邓文平[1] 杨芝歌[1] 张艺[1] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《水土保持通报》2012年第4期62-64,70,共4页Bulletin of Soil and Water Conservation

基　　金：国家林业公益性行业科研专项经费项目“典型森林植被对水资源形成过程的调控研究”(201104005);国家科技支撑项目:“海河上游水源涵养林体系构建技术研究与示范”(2011BAD38B05)

摘　　要：为研究较小尺度上不同林分的生态用水,采用实验方法对2010年生长季北京山区4种主要优势林分的生态用水量进行了测定。结果显示,4种林分的生态用水量分别为侧柏376.15mm,油松335.28mm,刺槐258.90mm,栓皮栎374.94mm。生态用水的各组分中林分蒸腾用水占据主导性地位;4种林分中,刺槐林地的有效降水能够满足全部的林地蒸散甚至补充少量土壤贮水,而其他3种林分均只能满足约75%的林地蒸散量和约55%的生态用水量。建议在降水贫乏的干旱山区造林时,适当增加刺槐林分的比例。The quantity of ecological use of water was determined using experimental methods in the four dominant mountain forests in Beijing area during the growing season of the year 2010. The ecological use of water Platycladus, Pinus tabulaeformis, Robinia pseudoacacia, and Quercus variabilis were 376. 15, 335.28, 258.90 and 374.94 mm, respectively. Vegetation transpiration was the major water use in total eco- logical use of water. Among the four forests, the effective precipitation in Robinia pseudoacacia was able to offset the water use as evapotranspiration, and was even able to add water into the soil as water storage, while the effective precipitations in the other three forests met only approximately 75 ~//0 of the water needs as evapotranspiration and 55 % of the total ecological use of water. Therefore, Robinia pseudoacacia forest was recommended for afforesting efforts in the areas with low precipitation.

关 键 词：优势林分 生态用水 测定 

分 类 号：S715[农业科学—林学]