Stduty On The Grassland Dynamic Monitoring Based On3S Technology In Xilinhot

This paper Select the Xilinhot grassland area as a typical region, use3S technique to the region, the grassland resources to carry on the investigation, from grassland area, community diversity, biomass, the degraded (degenerated, decertified, salinized) grassland, etc.the dynamics of changes in nearly10years The results show that the national implementation of sandstorm source engineering ten years, grassland vegetation restoration situation is better, for Inner Mongolia steppe construction and sustainable development provides reference model of development. The main conclusions are as follows:1Xilinhot grassland total area is149.49million hm2, including three classes, seven subclasses, and52type, which, temperate grassland area compared with2000, an increase of2.88million hm2of lowland meadow grassland area with2000annual reduction compared to5.35million hm2, the temperate meadow steppe area increase is not very obvious, compared with2000increased by1.90million hm2.2. In2000and2010Xilinhot grassland, the same grassland on the17different sample area calculated community characteristics:richness index and diversity index, dominance index, evenness index, the results obtained, the richness index from2000By2010,increase the more obvious. Diversity indices2000and2010no significant difference in the dominance index, evenness index from2000to2010to reduce the more obvious. Significant difference between the four Community Structure Index.3Using MODIS satellite image extraction NDVI vegetation index, and combined with the sample area data set up Xilinhot grassland biomass yield estimation model:Y=0.0308X+41.604,(R2=0.7163, p<0.001) achieve better fitting effect.4The Xilinhot grassland production were increased, the plant communities in the direction of stabilizing. The Xilinhot grassland average production in2005than in2000366kg/ha, an increase of24.2%; the Xilinhot lawn average production in2010than in2005299kg/ha, an increase of15.9%.5From2000to2010, the Xilinhot grassland area of degraded (degenerated, decertified, salinized) from2000’s126.63million hm2to114.27million hm2in2010. Overall the trend of severe degraded to moderate degraded and mild degraded transformation, grassland degraded of the area reduced.vegetation with varying degrees of recovery.6From the classification of the grass, all kinds of area, community diversity, biomass, grassland degraded and so many angles to analyze the trend of the the Xilinhot grass since2000. That the vegetation recovery more obvious.