水稻冠层结构变化对二向反射率的影响  

Effect of rice canopy structural changes on bidirectional reflectance.

作　　者：李云梅[1] 王人潮[1] 王秀珍[1] 沈掌泉[1] 

机构地区：[1]浙江大学农业遥感与信息技术研究所,杭州310029

出　　处：《应用生态学报》2001年第3期401-404,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金!资助项目 (49771 0 56)

摘　　要：通过对植被二向反射特性的研究 ,可反演植被冠层结构信息 ,如叶面积指数、平均叶角、株高、覆盖率等 .在大田晚稻 (秀水 6 3)移栽后第 2 6、35、41、49、6 2、6 7和 86d ,对水稻冠层结构及二向反射率进行实测 ,并分析了二向反射率随冠层结构变化规律 .结果表明 ,植被冠层二向反射率对入射角与观测角的敏感性随着植被冠层结构的变化而变化 ,蕴涵着丰富的植被结构信息 .The study of vegetation bidirectional reflectance is useful for remote sensing data interpretation. Vegetation canopies information such as leaf area index, mean leaf inclination, mean plant height, and coverage, can be inverted from vegetation bidirectional reflectance. This paper discussed the dynamics of vegetation canopies reflectance with vegetation canopy structures by measuring rice canopy structure and bidirectional reflectance at 26, 35, 41, 49, 62, 67 and 86 days after transplanting.It is concluded that the sensitivity of vegetation canopies to directional reflectance variations varied with canopy structures,and hence,through bidirectional reflectance, more information about canopy structure can be know.

关 键 词：冠层结构 二向反射率 天顶角 方位角 水稻 

分 类 号：S511[农业科学—作物学]