文献类型：期刊文献

中文题名：干旱区植物叶片大小对叶表面蒸腾及叶温的影响

英文题名：Influence of leaf size of plant on leaf transpiration and temperature in arid regions

作者：刘明虎[1] 辛智鸣[1] 徐军[1] 孙非[1] 窦立军[1] 李永华[2,3]

第一作者：刘明虎

机构：[1]中国林业科学研究院沙漠林业实验中心;[2]中国林业科学研究院荒漠化研究所;[3]国家林业局库姆塔格荒漠生态系统定位研究站

年份：2013

卷号：37

期号：5

起止页码：436-442

中文期刊名：植物生态学报

外文期刊名：Chinese Journal of Plant Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金(31200536和31070-628);林业公益性行业科研专项经费(201104077)

语种：中文

中文关键词：干旱区植物适应特征;叶片边界层阻力;叶温;叶片蒸腾速率;叶片宽度

外文关键词：arid plant adaptation characteristics, leaf boundary layer resistance, leaf temperature, leaf transpiration, leaf width

分类号：S665.1

摘要：利用热及物质交换原理,并结合前人研究成果,在单叶尺度上建立了简单的叶温和水气蒸腾模型。模型通过预设值驱动,预设值参照干旱区环境及植物叶片特征设置。模拟结果显示:随气孔阻力的增加,叶片蒸腾速率降低,叶温升高;同一环境下,具有低辐射吸收率的叶片蒸腾速率和叶温更低,并且气孔阻力越大,这种差异越明显。另外,叶片宽度及风速是影响叶片蒸腾及叶温的重要因子。干旱地区植物生长季节,风速小于0.1m·s–1、气孔阻力接近1000s·m–1时,降低叶片宽度不仅有利于降低叶片温度,而且能够降低叶片蒸腾速率,从而实现保持水分,增强植物适应高温、干旱的能力。
Aims Our objective was to demonstrate the influence of leaf size on leaf transpiration and temperature in arid regions. Methods Based on energy and material exchange theory and the results of previous studies, we set up a single leaf energy and material exchange model combined with arid environmental conditions. Important findings Leaf transpiration decreased with increasing stomatal resistance, but leaf temperature increased. Leaf transpiration and temperature decreased with decreasing leaf radiation absorption rate in the same environmental conditions. Moreover, leaf width and wind speed were important parameters in understanding leaf energy and material exchange. Leaf transpiration and temperature generally decreased with decreasing leaf width with wind speed 〈0.1 m.s^-1 and stomatal resistance about 1 000 s·m^-1. Low leaf transpiration and temperature could encourage plant growth with the low water availability, high radiation and high temnerature conditions in arid regions.