内蒙古林科院树木园油松人工林蒸散特征  

Evapotranspiration Characteristics of Pinus tabuliformis Plantation in the Arboretum of Inner Mongolia Academy of Forestry

作　　者：王云霓[1] 聂正英 杨帆 贾喜平 WANG Yun-ni;NIE Zheng-ying;YANG Fan;JIA Xi-ping(Inner Mongolia Academy of Forestry,Hohhot 010010,China;Wanjiagou Management station,Inner Mongolia Daqingshan National Nature Reserve,Hohhot 010010,China;I nner Mongolia General Station of Forestry and Grassland,Hohhot 010052,China;Shanggaotai Management station,Inner Mongolia Daqingshan National Nature Reserve,Ulanqab 012314,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古大青山国家级自然保护区万家沟管理站,内蒙古呼和浩特010010 [3]内蒙古自治区林业和草原种苗总站,内蒙古呼和浩特010052 [4]内蒙古大青山国家级自然保护区上高台管理站,内蒙古乌兰察布012314

出　　处：《内蒙古林业科技》2022年第1期38-41,共4页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自治区自然科学基金项目(2021MS03101)。

摘　　要：林分蒸散是森林水量平衡的主要组成部分,以内蒙古林科院树木园油松人工林为研究对象,同步监测树干液流、树干茎流、林内穿透雨和气象因子,分析了油松人工林蒸散及其组成。结果表明:整个生长季林分蒸散、冠层蒸腾、冠层截留、林地蒸散分别为392.53 mm、83.68 mm、68.90 mm和239.95 mm,分别占同期降水量的163.36%、34.83%、28.67%和99.86%;林分蒸散的月变化总体呈先增大后减小的变化趋势,最大值出现在8月,其次是7月、6月、5月和9月,分别占同期降水量的125.43%、174.07%、126.27%、232.13%、319.20%,均大于同期降水量。蒸散组分中,冠层蒸腾总体呈下降趋势,变化范围为7.49~20.96 mm;冠层截留主要受降水的影响,最大值出现在8月;林地月蒸散呈单峰型的变化趋势,8月的林地蒸散最大,为62.95 mm,5月的最小。自然降水已不能满足树木园油松林分的蒸散消耗,需要采取合理人工补水措施,保证城市环境森林植被的水分需求。The forest evapotranspiration is the main component of water balance.To study the evapotranspiration and its components,Pinus tabuliformis plantations in the arboretum of Inner Mongolia academy of forestry was selected as research stands.The sap flow,stem flow,throughfall and meteorological factors were monitored simultaneously,and the evapotranspiration and its composition of Pinus tabuliformis forest were analyzed.The results showed that the total evapotranspiration,canopy transpiration,canopy interception and forest floor evapotranspiration were 392.53 mm,83.68 mm,68.90 mm and 239.95 mm,respectively,accounting for 163.36%,34.83%,28.67%and 99.86%of the precipitation in the same period.The monthly change of total evapotranspiration showed a trend of first increasing and then decreasing,and the maximum value appeared in August,followed by July,June,May and September,it accounted for 125.43%,174.07%,126.27%,232.13%and 319.20%of the precipitation in the same period,respectively.Among the evapotranspiration components,the monthly transpiration showed a decreasing trend,with a variation range of 7.49-20.96 mm.The canopy interception was mainly influenced by precipitation,and the maximum value appeared in August.The monthly forest floor evapotranspiration showed a single peak variation trend,with a peak value of 62.95 mm in August.The natural precipitation cannot satisfy the evapotranspiration of the forest,and reasonable measures should be taken to ensure the water demand of the urban forest vegetation.

关 键 词：冠层蒸腾 冠层截留 蒸散 降水 

分 类 号：S715[农业科学—林学]