Abstract: The fact of grassland degradation in Hulun Buir and the impact of climate for grassland degeneration have studied, based on the meteorological, social investigation data by recently 50 years and remote sensing data during the past 1988. The result shows that: the vegetation index (VI) of Hulun Buir Grassland has a decreasing trend. Particularly, the VI of sandy grassland decreased significantly, in the central and west region, the VI have declined 0.2 and 0.2～0.4 respectively; The annual rate of Grassland degradation in Hulun Buir is 1.35%;The grasslands degeneration faces the outside expand from densely populated area, and the proportion of good herbage comes down in grass group. Climate analysis shows that, increase temperature, reducing rainfall and drought frequency resulted in a rapid increase in size of Grassland degradation are the main reasons.

Key words: Grassland Degradation, Remote sensing monitoring, Climatic causes

CLC Number: 

• S812

• 5162.3

• S127

• TP79

• S812.6