毛乌素沙地东北部典型林场新疆杨(Populus alba var.pyramidalis)液流特征  

Characteristics of the sap flow of Populus alba var.pyramidalis in typical forests in the northeastern part of the Mu Us Desert

作　　者：马启民 罗旭冉 赵人瑰 王增艳 余文莉 贾晓鹏 Ma Qimin;Luo Xuran;Zhao Rengui;Wang Zengyan;Yu Wenli;Jia Xiaopeng(College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China;National Cryosphere Desert Data Center,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730070,China;The College of Geography and Environmental Science/MOE Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions,Henan University,Kaifeng 475004,Henan,China;Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Chinese Academy of Sciences,Lanzhou 730070,China)

机构地区：[1]成都信息工程大学资源环境学院,四川成都610225 [2]中国科学院西北生态环境资源研究院国家冰川冻土沙漠科学数据中心,甘肃兰州730070 [3]河南大学地理与环境学院/黄河中下游数字地理技术教育部重点实验室,河南开封475004 [4]中国科学院西北生态环境资源研究院干旱区生态安全与可持续发展重点实验室,甘肃兰州730070

出　　处：《中国沙漠》2025年第2期176-183,共8页Journal of Desert Research

基　　金：国家自然科学基金项目(42101324);国家冰川冻土沙漠科学数据中心专题(E01Z790201);成都信息工程大学人才引进项目(KYTZ202113)。

摘　　要：理解新疆杨(Populus alba var.pyramidalis)耗水特征对制定沙地人工林科学用水灌溉策略以及林场经营建设具有重要意义。采用包裹式树干茎流仪测定新疆杨液流,并对毛乌素沙地的环境因子进行长期监测。结果表明:新疆杨晴天液流速率最大,阴天次之,雨天最小,日液流累计量分别为16.38、12.56、2.22 L,晴天和阴天的液流速率接近。5、6、7、8、9、10月的日平均液流量分别为12.12、14.07、14.08、11.60、8.73、3.92 L,5—8月是新疆杨主要的耗水期,累计耗水量为1722.53 L。新疆杨液流与净辐射、饱和水汽压差、气温、太阳辐射、土壤热通量、土壤温度显著正相关,相关系数分别为0.656、0.641、0.634、0.625、0.605、0.467;与土壤湿度、空气相对湿度、降水量显著负相关,相关系数分别为-0.340、-0.233、-0.178;与风速相关性不显著。净辐射对于新疆杨液流的影响最大。Understanding the water consumption characteristics of Populus alba var.pyramidalis is of great significance to the development of scientific water use and irrigation strategies for sand plantation forests as well as to the management and construction of forest farms.The study used the wrapped trunk stem flow meter to determine the sap flow of P.alba var.pyramidalis,and long-term monitoring of environmental factors in the Mu Us Desert.The results show that different meteorological conditions and environmental factors have different degrees of influence on the sap flow of P.alba var.pyramidalis,the maximum sap flow rate on sunny days,followed by cloudy days,and the minimum on rainy days,and the cumulative amount of daily sap flow was 16.38 L,12.56 L,and 2.22 L,respectively,and the average sap flow rates of sunny and cloudy days were close to those of cloudy days.The average daily liquid flow rate of each month from May to October was 12.12,14.07,14.08,11.60,8.73 and 3.92 L,respectively,and May to August was the main water consumption period of P.alba var.pyramidalis,with a cumulative water consumption of 1722.53 L.The sap flow of P.alba var.pyramidalis was significantly positively correlated with net radiation,saturated water vapor pressure difference,air temperature,solar radiation,soil heat flux and soil temperature,with correlation coefficients of 0.656,0.641,0.634,0.625,0.605,0.467,respectively;and it was negatively correlated with soil moisture,relative humidity and precipitation,with correlation coefficients of-0.340,-0.233,-0.178,respectively;and it was irrelevant to the wind speed,of which the effect of net radiation was the most important for P.alba var.pyramidalis liquid flow.The effect of net radiation on the fluid flow of Populus alba var.pyramidalis was the largest.

关 键 词：新疆杨 热平衡法 树干液流 毛乌素沙地 环境因子 

分 类 号：Q945[生物学—植物学]