Research on the relationship between climate and plant community in north grassland of China

摘要

@@Introduction Farming-pastoral transitional zone is an important region in Northern China,whatever from its productivity or ecological function.For several decades,overgrazing have made the significant changes of vegetation.The land is being continuous degradation.Although there is lack of historical vegetation cover data,long-term meteorological data has been collected for the past 40-50 years.To explore the dynamic of vegetation which is effect by climate,large area survey,and historical data analysis are used.