南水北调与水利科技Issue(4)：771-775,5.DOI:10.13476/j.cnki.nsbdqk.2015.04.036
旱区沙柳蒸腾规律及其对气象因子的响应
Transpiration of Salix psammophila and its response to meteorological factors in arid area
摘要
Abstract
In order t o investigate the relationship between the transpiration of Salix psammophila and meteorological factors, packaged sap flow gauge w as used to measure the sap flow velocities in the full leaf season and defoliation season. The results show ed that ( 1) the sap flow velocity of Salix psammophila branch has a positive correlation w ith branch diameter; ( 2) sap flow velocity increases gradually from 7 am in the morning, reaches a peak between 10 am in the morning and 3 pm in the aft ernoon, then decreases gradually from 4 pm in the aft ernoon to the low est value ( near zero) aft er 9 pm at night; ( 3) sap flow velocity of Salix psammophila has an obviously seasonal variat ion w ith the maximum value in July while the minimum in November; ( 4) met eorological factors are the most significant factors affecting the sap flow velocity of Salix psammophila in the following or-der: vapor pressure deficit> solar radiation> air tem perat ure> relative humidity> w ind speed; and ( 5) there is a significant ly linear relat ionship betw een sap f low velocity and reference evapotranspiration w ith a correlat ion coefficient of R2 = 0. 77.关键词
沙柳/液流速率/气象因子/干旱区Key words
Salix psammophila/sap flow velocit y/meteorological fact or/arid area分类
农业科技引用本文复制引用
王强民,王文科,王周锋,安可栋,陈立,宫程程..旱区沙柳蒸腾规律及其对气象因子的响应[J].南水北调与水利科技,2015,(4):771-775,5.基金项目
国家自然科学基金重点项目“旱区地表-地下水系统界面动力学与水循环研究(41230314)” （41230314）
国家自然科学基金青年基金“渭河流域地下水系统对气候变化的响应研究(41202164)” （41202164）
教育部博士点基金项目“渭河流域地下水对气候变化响应机制研究(20100205110007)” （20100205110007）
国土资源公益性行业科研专项经费“鄂尔多斯盆地水与生态环境关系科研平台建设-水与生态关系调查研究(201311076-4)” （201311076-4）
