基于高光谱的阿克苏市枣叶面积指数估算模型  

Hyperspectral Estimation Models of Jujube Leaf Area Index in Southern Xinjiang Basin

作　　者：贾永倩 王振锡[1] 李园[1] 瞿余红 刘玉霞[1] JIA Yong - qian WANG Zhen - xi LI Yuan QU Yu - hong LIU Yu - xia(College of Forestry and Horticulture, Xinjiang Agricultural University/Key Laboratory of Forestry Ecology and Industry Technology in Arid Area of Education Department of Xinjiang, Urumqi 830052, Chin)

机构地区：[1]新疆农业大学林学与园艺学院/新疆教育厅干旱区林业生态与产业技术重点实验室,乌鲁木齐830052

出　　处：《新疆农业科学》2016年第12期2175-2186,共12页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2013I16);高分辨率对地观测系统专项"新疆特色林果面积精准监测与应用示范分系统"(95-Y40B02-9001-13/15-01-01);中国博士后科学基金项目(2015M572668XB)~~

摘　　要：【目的】通过将原始光谱数据经过不同的数据变换方式,分析其与枣冠层LAI的相关关系,建立基于高光谱的阿克苏市枣冠层LAI的估测模型,为快速、精确、无损伤、大范围的适时、动态监测植被LAI提供有效途径。【方法】基于原始光谱数据的不同数据变换方式,采用相关性分析和逐步回归分析方法。【结果】不同数据变换后的冠层光谱反射率与枣LAI具有较好的相关性,微分变换后的相关性较原始相关性有所提升。所建模型经过精度评价发现,原始光谱数据经倒数一阶微分变换后估测模型拟合度和预测精度都最高,一阶微分、对数一阶微分、归一化一阶微分次之。【结论】不同数据变换方式后的光谱数据与塔里木盆地枣LAI有显著的相关性,可以用微分、对数微分、归一化微分、倒数微分变换后的数据建立较理想的塔里木盆地枣LAI的估测模型。[ Objective] The project aims to transform original spectral data by different methods, analyze their relationship with Jujube LAI, establish the Hyperspeetral Estimation Models of Jujube LAI in Southern Xinjiang in the hope of providing an effective way for the rapid, accurate, non - invasive, a wide range of timely, dynamic monitoring of vegetation LAI. [ Method ] Based on different data transformations of original spectral reflectance, using correlation analysis and stepwise regression analysis. [ Result ] Different data trans- formations of original spectral reflectance and Jujube LAI had a better correlation. The model through the ac- curacy assessment found that the original spectral data by inverse first - order differential transformation had the highest fitness and prediction accuracy. The first - order differential, the logarithmic first - order differen- tial, followed by normalized first - order differential. [ Conclusion ] There is a significant correlation between the spectral data of different transformation and Jujube LAI in Southern Xinjiang, and the model can be estab- lished by first - order differential, logarithmic first - order differential, the normalized first - order differential, inverse first - order differential of original spectral reflectance to estimate Jujube LAI in Southern Xinjiang.

关 键 词：红枣 高光谱 叶面积指数 

分 类 号：S665.1[农业科学—果树学]