黑河中游二白杨叶面积指数动态变化及其与耗水量的关系  

Variation of Leaf Area Index of Gansu Poplar and Its Relation to Water Consumption during Growing Season in the Middle Reaches of Heihe River

作　　者：常学向[1] 赵文智[1] 赵爱芬[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所临泽内陆河流域综合研究站寒旱区流域水文及应用生态实验室,甘肃兰州730000 [2]鲁东大学生命科学学院,山东烟台264025

出　　处：《冰川冻土》2006年第1期85-90,共6页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新重大项目(KZCX1-09二期);中国科学院资源环境领域野外台站基金项目(2005410)资助

摘　　要：在黑河中游，利用直接法和热脉冲树干液流仪分别监测了二白杨生长季节的叶面积指数和耗水量动态变化，研究了二白杨叶面积指数动态变化规律及其与耗水量的关系．结果表明：在生长季节，二白杨叶面积指数的增长符合Logistic模型；在树冠结构垂直分布上，1000～1400cm之间二白杨叶面积指数占全树叶面积指数的75.5％；二白杨个体间的叶面积指数与胸径平方和树高乘积呈指数函数关系．当单株叶面积指数从0．44增大到4．94时，二白杨耗水量从42．95L·d^-1增加到140．30L·d^-1，单株二白杨耗水量与叶面积指数之间呈现线性关系．In the middle reaches of Heihe River, leaf area index （LAI） and water consumption of Gansu Poplar （Populus gansuensis C. Wang et H. L. Yang） were measured by direct method and Heat Pulse Meter SF300 made in Australia during growing season, respectively, and the variation of leaf area index of Gansu Poplar and its relation to water consumption were studied. The measurements suggest that the increase of LAI of Gansu Poplar follows the Logistic relationship during growing season. The Gansu Poplar LAI from 10 m to 14 m in tree height accounts for 75.5 percent of the total. For the Gansu Poplar, there is an exponential relationship between the individual LAI and the product of square diameter at the breast height （DBH） and tree height. The water consumption increases from 42.95 L·d^-1 to 140.30 L· d^-1 when the LAI increases from 0.44 to 4.94. There is a linear relationship between the water consumption and the LAI.

关 键 词：叶面积指数 耗水量 二白杨 黑河中游 

分 类 号：Q945.172[生物学—植物学]