都江堰市银杏物候时序特征的数码相机监测与分析  

Digital Lapse Photography-based Monitoring of Foliage Phenological Time Variance of Ginkgo biloba in Dujiangyan

作　　者：廖韵 董奎[2] 付静静[3] 曹钦 王韵[5] 廖邦洪[5] 

机构地区：[1]四川省森林旅游服务中心,四川成都610081 [2]四川省林业勘察设计研究院,四川成都610081 [3]四川农业大学都江堰校区学生工作部,四川都江堰611830 [4]北京地林伟业科技股份有限公司西南(成都)分公司,四川成都610081 [5]四川农业大学建筑与城乡规划学院,四川都江堰611830

出　　处：《四川林业科技》2016年第3期54-61,共8页Journal of Sichuan Forestry Science and Technology

基　　金：基金项目:四川红叶观赏指数发布

摘　　要：红叶树种秋天呈现的色彩是由树种的遗传基因决定的，而在一年中不同季节的颜色表现和变换是由叶片内含的叶绿素、花青素和叶黄素数量及其比例消长制约的；环境气候条件和季节的变化则起着空间和时间上的驱动和引导作用。采用可见光一红外数码相机延时摄影方法得到四川都江堰市银杏2014年的物候时序图像数据，用ENVI／IDL编程进行图像分析提取其NDVI、Gcc、ExG3种植被指数的时序数据；利用TIMESAT拟合建立双逻辑斯蒂曲线模型，用1／2最大值法计算得到都江堰市银杏2014年的关键物候期（年序日）：生长季开始期（SOS）、生长最大值时期（MOE）、生长季结束期（EOS）和生长期（LOS）。然后，对银杏秋季的NDVI、Gcc、ExG3种指数曲线模型的下降速率（百分率）进行分析，表明：下降百分率在50％～90％区间所对应的物候年序日，与同年四川省四期红叶指数的发布时间（反映全省红叶景区的观赏适宜时期）有良好的响应关系，其中由NDVI植被指数得到的时间最为接近。基于数码相机植被颜色指数的树木物候遥感监测方法，在森林生态旅游研究中具有巨大的应用潜力。Favored foliage colors in autumn are genetically determined by the genes of tree species, differ- ent seasonal colors and transition are theorieally controlled by the pigments （chlorophyll, anthoeyanidin, xanthophyll etc. ） in leaves,and the transitions of geographical environment and seasons drive and model them in time and space. In 2014, digital lapse photography was used to collect the phenologieal image time series of Ginkgo biloba growing in Dujiangyan Campus, then ENVI programming was used to calculate temporal changes of three vegetation indices, NDVI, Gcc and ExG. A computer program, TIMESAT, was applied to fit the double logistic function of a time series data of NDVI, Gcc and ExG of Ginkgo biloba in Dujiangyan. The maximum value method of the half curve was used to calculate the key phenological date （the serial days of a year） of G. biloba：the start date of growing season（SOS） ,the end date of growingseason （EOS） ,the maximum of growing and the length of season. Analysis was made of decline percentage in fall along the curves of NDVI, Gcc and ExG respectively, and the results showed the percentage （ the serial days of a year） between 50% and 90% had a good response to the released time of four red leaf tourim guide index in the same year of Sichuan Province,especially DOY from the NDVI curve was almost the same. The result showed the phenological monitoring method by digital camera-based remote sensing was a potential tool for forest tourism research.

关 键 词：银杏 物候 时序特征 数码相机 植被指数 遥感监测 生态旅游 都江堰市 

分 类 号：S792.95[农业科学—林木遗传育种]