Estimation of Remote Sensing and Analysis of Temporal and Spatial Distribution of Grassland LAI

作     者：Chengming SUN Tao LIU Doudou GUO Ting TIAN Lijian WANG Yingying CHEN Jianlong LI 

作者机构：Key Laboratory of Crop Genetics and Physiology of Jiangsu ProvinceCollege of AgricultureYangzhou University College of Life ScienceNanjing University 

出 版 物：《Asian Agricultural Research》 (亚洲农业研究（英文）)

年 卷 期：2013年第5卷第11期

页      面：88-92页

学科分类：090503[农学-草业科学] 0909[农学-草学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 

基　　金：Supported by the Key Project of National Programs for Fundamental Research and Development(973 Program)of China(2010CB950702) the Asia-Pacific Network for Global Change Research Project(ARCP2011-06CMY-LI) 

主　　题：Estimation model Grassland LAI MODIS NDVI Temporal 

摘      要：To estimate the leaf area index(LAI)in large areas,this paper analyzes the relationships between normalized difference vegetation index(NDVI)and the grassland LAI based on MODIS data in the southern grassy mountains and slopes of *** using nonlinear fitting equation we constructed the basic estimation model of grassland LAI with NDVI as the independent variable and introduced precipitation and temperature as regulatory *** model was validated with observed data in different years and the results showed that there was a good correlation between the simulated and observed LAI value with a statistically significant level of *** was 0.302 and RRMSE was *** was also found that the spatial distribution of grassland LAI in south China showed a remarkable zonal characterization,and temporal distribution showed a single peak *** results provided a theoretical basis for the effective management of southern grassland resources and the carbon sink estimation of the nationwide grasslands.