文献类型：期刊文献

中文题名：不同时间尺度气象因子与柽柳树干液流关系研究

英文题名：Relationships between meteorological factors and Tamarix chinensis’s sap flow at different time scales

作者：黄雅茹[1] 李永华[2,3,4] 辛智鸣[1] 董雪[1] 张正国[2] 马迎宾[1]

第一作者：黄雅茹

机构：[1]中国林业科学研究院沙漠林业实验中心/内蒙古磴口荒漠生态系统国家定位观测研究站,磴口015200;[2]中国林业科学研究院荒漠化研究所,北京100091;[3]库姆塔格荒漠生态系统国家定位观测研究站,敦煌736200;[4]甘肃敦煌荒漠生态系统国家定位观测研究站,敦煌736200

年份：2020

卷号：34

期号：11

起止页码：149-154

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2017】；CSSCI:【CSSCI2019_2020】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金(41671049);国家重点研发计划(2017YFC503804-4);科技基础资源调查专项(2017FY100203-1)资助。

语种：中文

中文关键词：柽柳;液流;库姆塔格沙漠;气象因子

外文关键词：Tamarix chinensis Lour.;sap flow;Kumtag desert;meteorological factors

分类号：S718.43

摘要：为揭示气象因子对柽柳液流的影响是否存在时间尺度差异,对库姆塔格沙漠东南部柽柳液流速率及气象因子(太阳总辐射TR、风速WS、空气相对湿度RH、空气温度T、饱和水汽压差VPD)进行持续5个月的同步观测。结果表明:月尺度下,VPD是液流速率变化的主要影响因子,单独能解释94.4%的液流速率变化;日尺度下,TR、WS、RH、T对液流速率变化影响最大,TR可以解释液流速率变化的75.5%,4个因子共同可以解释79.8%的液流速率变化;小时尺度下,对5、6、8、9月液流速率的影响最大的是T,7月是TR。随着时间尺度的扩大,对液流速率变化的影响因子由多变少。通过气象因子模拟计算小时尺度柽柳液流速率需要的参数较多,预测月尺度液流速率需要的参数最少,可靠性最大。因此,从可靠性及所需参数数量上考虑,月尺度预测更为合适。
In order to reveal whether there is a time scale difference in the influence of meteorological factors on the sap flow of Tamarix chinensis in Kumtag Desert,the sap flow of Tamarix chinensis and meteorological factors(solar radiation,wind speed,air temperature,air humidity,vapor pressure deficit(VPD))were observed synchronously for 5 months.The results showed that on the monthly scale,VPD are the main factors influencing the sap flow of Tamarix chinensis.VPD alone can explain 94.4%of sap flow changes.Solar radiation,wind speed,air temperature and air humidity have the greatest influence on the sap flow changes of Tamarix chinensis on a daily scale.Solar radiation can explain 75.5%of the sap flow changes of Tamarix chinensis,and 79.8%of the sap flow changes of Tamarix chinensis can be explained by all three factors.On the hourly scale,temperature is the most important factor influencing on the liquid flow rate in May,June,August and September,and total radiation is the most important factor influencing the liquid flow rate in July.With the expansion of the time scale,the factors affecting the flow rate change from more to less.More parameters are required for using meteorological factors to calculate the hourly scale Tamarix chinensis sap flow rate,and the least parameters are needed to predict monthly liquid flow rate,and the reliability is the highest.Therefore,considering the reliability and the number of required parameters,monthly scale prediction is more appropriate.