海南石梅湾青皮林LAI的冠层数字成像间接法测算  

Measurement of LAI of Vatica Forest by Indirect Method——Imaging Digital Canopy in Shimei Bay, Hainan Island

作　　者：颜文洪[1] 胡玉佳[1] 

机构地区：[1]中山大学生命科学学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2004年第3期71-74,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：香港华润科技研究基金资助项目(0258)

摘　　要：对基于林隙比(gap＿fraction)原理的LAI数字成像间接法进行了系统的描述,通过对石梅湾青皮林及其周围其它不同类型的次生林和人工群落共9个观测点的测定,得出了相应群落的叶面积指数、消光系数、辐射透过系数等冠层的特征指标,按垂直结构测算了不同阶段的青皮林LAI特性,指出了CI110冠层数字成像仪(DigitalPlantCanopyImagerCI110)减小人为误差的方法。处于顶极状态的青皮林的叶面积指数为3 554,低于典型结构的热带雨林,探讨了石梅湾青皮林LAI比混合雨林和山地雨林LAI小的原因。The indirect method—Imaging Digital Canopy, based on 'gap-fraction' process, was described. By study in various communities about 9 measuring spots, it showed characteristics of community such as LAI,radiation transmission coefficient、extinction coefficient. LAI of Vatica forest was measured according to vertical height of community in different developing stages. The technique to minimize error about the Digital Plant Canopy Imager CI110 was mentioned and analyzed. For comparison, LAI of other communities around the Vatica forest were also detected. It showed that the LAI index of Vatica forest is 3\^554. And it was discussed that LAI of Vatica forest was lower than that of other typical rainforest.

关 键 词：LAI(1eaf area index 叶面积指数) 青皮林 冠层数字成像 石梅湾 

分 类 号：Q948.15[生物学—植物学]