影响植被内部辐射状况的冠层结构特征研究

STUDY OF CANOPY STRUCTURE CHARACTERISTIC INFLUENCING ON PLANT INTERNAL RADIATION CONDITION

植被冠层结构特征是影响植被内部辐射状况的重要因子之一，对于 植被群体的光合特性来说，冠层结构特性影响了光合有效辐射的截获、吸收和透 射。本文着重分析了冠层结构的数量特征（如叶面积指数）和冠层几何结构特性，综 合考虑叶倾角、叶方位角和Ｇ函数等群体几何特征，以便直接用于遥感光合植被生 物量机理估测模型的建立。

The plant canopy structure is an important factor influencing on the radiation condition of plant canopy. For the vegetation photosynthetic characteristic,the canopy structure affects the interception, absorption and transmission of PAR in canopy. In the paper, the numerical characteristic (e. g. LAI)and geometrical structure characteristic of canopy were analyzed. The leaf incline angle,leaf position angle and G function were considered. And this can be used to establish the estimating biomass model based on remote sensing and plant photosynthetic.