应用生态学报2013，Vol.24Issue(8)：2089-2096,8.
宁夏六盘山人工林和天然林生长季的蒸散特征
Evapotranspiration characteristics of artificial and natural forests in Liupan Mountains of Ningxia, China during growth season
摘要
Abstract
In order to understand the effects of the structure of forest ecosystem on the hydrological processes,a comparative study by using thermal dissipation technique and hydrological methodology was made on the evapotranspiration (ET) and its components of Larix principis-rupprechtii plantation and Pinus armandi natural forest in two adjacent stands in a small catchment Xiangshuihe of Liupan Mountains during the growth season (May-October) in 2009.Throughout the growth season,the total ET from the plantation was 518.2 mm,which accounted for 104.6％ of the precipitation and was much higher than that (420.5 mm) of the natural forest.The allocation of ET in the vertical layers performed similarly between the two stands,with the order of canopy layer ＞ herb and soil layer ＞ shrub layer,but the ratio of each component to total ET differed significantly.The plantation consumed 0.2 and 0.9 times more water for canopy interception (19.6 mm per month) and tree transpiration (25.2 mm per month) than the natural forest,respectively.However,the transpiration from the plantation was 4.4 mm per month,and took up 23.4％ of the natural forest.In contrast,the sum of soil evaporation and herbage evapotranspiration consumed 37.1 mm water per month in the plantation,which was 0.8 times higher than that in the natural forest.The ET was calculated by Penman-Monteith equation to compare the results estimated by sap flow measurements,and the values estimated by the two methods were similar.关键词
六盘山/华北落叶松人工林/华山松天然林/热扩散技术/蒸散Key words
Liupan Mountains/Larix principis-rupprechtii plantation/Pinus armandii natural forest/thermal dissipation technique/evapotranspiration分类
农业科技引用本文复制引用
曹恭祥,王绪芳,熊伟,王彦辉,于澎涛,王云霓,徐丽宏,李振华..宁夏六盘山人工林和天然林生长季的蒸散特征[J].应用生态学报,2013,24(8):2089-2096,8.基金项目
"十二五"国家科技支撑计划项目(2011BAD38B0503,2012BAD22B030102)、林业公益性行业科研专项(200904056,201104005-02)和国家自然科学基金项目(41230852,41071023)资助. （2011BAD38B0503,2012BAD22B030102）
