Abstract: Based on Inner Mongolia grassland as the study area, using the MODIS NDVI data, combined with field experiment and statistical yearbook, grazing capacity estimation model is established, and has carried on the estimate for 2012 grazing intensity. The results show that grassland grazing capacity and the difference between two period of NDVI was significantly positive correlation. Through regression analysis, grazing capacity estimation model is Y = 4.203 ( X_i - X_j ) + 956.572. Grazing intensity of various types of grassland in Inner Mongolia evidently decrease gradually from west to east. The grazing intensity is meadow steppe

Key words: MODIS, normalized difference vegetation index (NDVI), Inner Mongolia grassland, grazing intensity

摘要： 以内蒙古草地为研究区, 应用MODIS-NDVI数据, 结合地面野外调查以及统计数据, 建立载蓄量估算模型, 并对2012年放牧强度进行估测。结果表明: 草地的载畜量和相邻两旬的NDVI差值显著正相关。通过两个旬度的NDVI差值与载畜量之间的回归分析, 建立载蓄量估算模型为: Y = 4.203(X_i - X_j) + 956.572; 内蒙古各草地类型的放牧强度都呈现自西向东逐渐减少的趋势, 放牧强度表现为草甸草原<典型草原<荒漠草原。利用遥感影像得到的放牧强度估测结果, 经过地面的野外实验数据验证, 精度可达70.7%。

关键词: MODIS, 归一化植被指数, 内蒙古草地, 放牧强度