崂山麻栎树干液流变化特征及其对环境因子的响应  

Characteristics of Sap Flow of Quercus acutissima and Its Response to Environmental Factors in Laoshan Mountain

作　　者：于琳倩 范培先 高群 YU Linqian;FAN Peixian;GAO Qun(Qingdao Garden and Forestry Service Center of Shandong,Qingdao 266003,China;National Positioning Observation and Research Station of Qingdao Forest Ecosystem,Qingdao 266003,China;Qingdao Key Laboratory of Forest and Wetland of Shandong,Qingdao 266003,China)

机构地区：[1]青岛市园林和林业综合服务中心,山东青岛266003 [2]山东青岛森林生态系统国家定位观测研究站,山东青岛266003 [3]青岛市森林和湿地生态研究重点实验室,山东青岛266003

出　　处：《浙江林业科技》2024年第4期21-27,共7页Journal of Zhejiang Forestry Science and Technology

摘　　要：以崂山自然保护区麻栎Quercus acutissima为研究对象,利用TDP插针式热扩散探针技术,在不同生长季节进行树干液流监测,并同步记录样地内空气温度、湿度、气压、风速、光合辐射和土壤温度等环境因子,分析树干液流对不同环境因子的响应特征。结果表明:树干液流日变化呈昼高夜低的单峰曲线,8月份是树干液流速率峰值和均值最高的时间段;树干液流受光合有效辐射、饱和水汽压差、空气温度和相对湿度因子的影响,检验水平为极显著(P<0.01),其中光合有效辐射是最显著的影响因子;通过多元回归分析建立了以上因子与树干液流的回归方程,决定系数为R^(2)=0.824。During May and October 2021,sample plot of 1 ha was established in artificial broad-leaved forest in Laoshan Natural Reserve of Shandong.4 trees of Quercus acutissima were selected as sample tree for determination of DBH,height,crown width,sapwood area,and at meantime,the environment factors like temperature,humidity,pressure,wind speed,photosynthetic radiation and soil temperature was measured.Sap flow of Qu.acutissima was read by TDP sap flow meter.The result demonstrated that daily variation of sap flow was a unimodal curve.The peak and average sap flow were the highest in August.The sap flow was influenced by environment factors such as photosynthetically active radiation,saturation vapor pressure difference,air temperature,and relative humidity,with extremely significant(P<0.01),especially photosynthetically active radiation.Multiple regression analysis resulted the regression equation of sap flow and environmental factors,with the decision coefficient R^(2) of 0.747.

关 键 词：麻栎 树干液流 环境因子 光合有效辐射 

分 类 号：S792.181[农业科学—林木遗传育种]