干热河谷4个树种叶温与蒸腾速率关系的研究  

Relationship between Leaf Temperature and Transpiration of 4 Tree Species in Dry-hot Valley in Yunnan

作　　者：彭辉[1] 李昆[1,2] 孙永玉[1,2] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,云南昆明650224 [2]国家林业局元谋荒漠生态定位站,云南元谋651300

出　　处：《西北林学院学报》2009年第4期1-4,18,共5页Journal of Northwest Forestry University

基　　金：国家科技部"十一五"科技支撑课题:(2006BAD03A0101);(2006BAD03A0304)

摘　　要：对金沙江干热河谷4个树种叶温与蒸腾速率日进程在旱季和雨季的关系进行研究,结果表明:(1)4个树种旱季蒸腾受到严重抑制呈单峰曲线,致使叶温大部分时间高于气温。其中旱季通过蒸腾控制叶温的能力排序为车桑子>赤桉>苏门答腊金合欢>大叶相思。(2)雨季4个树种蒸腾均为双峰曲线,都有明显的"午降现象",且叶温大部分时间低于气温。The leaf temperature and diurnal course of transpiration rate of 4 tree species in rain season and dry season in dry-hot valley were studied. The results showed that （1） the transpiration of 4 tree species were all severely inhibited, and exhibited single-peak curve under dry season, the leaf temperature were higher than air temperature, the ability of maintaining leaf temperature through transpiration was in the order of Dodonaea viscosa （L） Jacq〉 Eucalyptus camaldulensis Dehnh〉Acacia glauca （L） Moelichl〉 Acacia auriculiformis A. Cunn. ex Benthn, （2） in rain season, the diurnal course of transpiration rate of 4 tree species showed double-peak curve, there appeared an obviously phenomenon of transpiration midday depression ,and the leaf temperature was lower than air temperature in most of the daytime.

关 键 词：干热河谷 叶温 蒸腾速率 

分 类 号：S718.43[农业科学—林学]