冬小麦冠层的F_(APAR)、LAI、VIs之间关系的研究  

Research on the Relationships among F_( APAR), LAI and VIs in the Winter Wheat Canopy

作　　者：王培娟[1] 朱启疆[1] 吴门新[1] 刘素红[1] 帅艳民[1] 

机构地区：[1]北京师范大学遥感与GIS研究中心

出　　处：《遥感信息》2003年第3期19-22,共4页Remote Sensing Information

基　　金：国家重点基础研究发展规划项目 (课题编号 :G2 0 0 0 0 779);国家 863计划项目 (课题编号 :2 0 0 1AA13 5 0 3 0 )

摘　　要：利用北京顺义地区的冬小麦在 2 0 0 1年 4月生长期内的光合有效辐射 (PAR ,PhotosyntheticallyActiveRadiation)、叶面积指数 (LAI ,LeafAreaIndex)和冬小麦光谱观测数据 ,研究了光合有效辐射吸收系数 (FAPAR,theFractionofAbsorbedPhoto syntheticallyActiveRadiation)、叶面积指数和植被指数 (VIs ,VegetationIndices)之间的相关关系 ,发现FAPAR与LAI之间具有很好的线性关系 ,复相关系数 (R2 ) [4] 达到 0 .94 2 7,FAPAR和LAI与植被指数之间具有很好的指数相关关系 ,复相关系数均在 0 .9以上 ,三者之间满足了相关关系的传递性 ;同时在多种植被指数中 ,复归一化差值植被指数 (RDVI,RenormalizedDifferenceVegetationIndex)Based upon the observed data of the winter wheat canopy during April 2001 in Shunyi, Beijing, this paper studied the relationships among the fraction of absorbed photosynthetically active radiation (F APAR ), the leaf area index (LAI), and the vegetation indices (VIs). The results illustrate that there is a good linear correlation between F APAR and LAI, and the coefficient of the determination (R2) is approaching the value of 0.942 7. In addition, there is a good exponential correlation between F APAR and VIs, so does it with LAI and VIs. This coefficient of the determination is greater than 0.9. The relationships among them indicate the integrity and transmittability. Meanwhile, the conclusion is drawn that out of VIs, the Renormalized Difference Vegetation Index (RDVI) possesses the best correlation with LAI and F APAR respectively.

关 键 词：冬小麦 冠层 光合有效辐射 叶面积指数 光合有效辐射吸收系数 遥感 图像处理 

分 类 号：S512.11[农业科学—作物学] TP751[自动化与计算机技术—检测技术与自动化装置]