关键词: 草原, 返青动态, 长势动态, MODIS植被指数, 休牧

Abstract: According to the EOS/MODIS satellite images,ground sites data,and climatic information,the returning green status of Xilingol Grassland was monitored form 2003 to 2007.The results show that 88.85% grassland in 2007 was in normal greening or well greening with average yield of 574.5 kg·hm^-1 and average coverage of 35%.To compare with last year,the forage yield in 2007 increased 1.5 times and vegetative coverage increased twice.To compare with last five years,the grassland was growing well in 2007.In recent years,Xilingol grassland recovered gradually,forage growth and yield showed consistent dynamics with precipitation and quantity of heat,that could be attributed to implementation of grassland protection by rest-grazing,grazing forbidden,and realization of grass-livestock balance system.

Key words: Grassland, Returning green status, Growing dynamics, MODIS Vegetation Index, Rest-grazing