叶面积指数间接测量方法分析

摘要

Leaf area index (LAI) is defined as the ratio of the total blade surface area of the plant and the area occupied by the plant.It is an important parameter for describing the growth situation of plants.Two dominating branches of the indirect LAI measuring methods were summarized:remote sensing quantitative analysis and LIDAR measurements,and three methods under the two branches were introduced in detail:statistical model method,optical model method and LIDAR measurement,the principle and research progress were elaborated.On the basis of this,the advantages and disadvantages and development trends of LAI measurement methods were discussed.%叶面积指数(LAI)被定义为植物所有叶片表面积总和与植株所占的土地面积的比值,是表征植物生长趋势的重要参数.总结了当前LAI间接测量研究中的2个重要分支:遥感定量法和LIDAR测量法；详细地介绍了这2个分支下的3种方法:统计模型法、光学模型法、LIDAR测量法,阐述了各自的原理和研究进展；在此基础上,讨论了3种方法的优缺点及未来的发展趋势.