Spatial and temporal evolution of grassland area and prediction of its changing trend in farming-pastoral ecotone of Northern Shaannxi
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DOI：10.7606/j.issn.1000-7601.2011.03.39
Key Words: grassland area  spatial and temporal evolution  prediction  farming-pastoral ecotone of Northern Shaanx
Author NameAffiliation
WANG Jianhong College of Tourism and Environment，Shaanxi Normal University， Xi'an, Shaanxi 710062，China 
LI Jing College of Tourism and Environment，Shaanxi Normal University， Xi'an, Shaanxi 710062，China 
REN Zhiyuan College of Tourism and Environment，Shaanxi Normal University， Xi'an, Shaanxi 710062，China 
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Abstract:
      By using the Landsat TM images of 1989, 2000 and 2006 and with the help of GIS and RS，the spatial and temporal evolution of grassland area were analyzed in farming pastoral ecotone of Northern Shannxi. The results showed that because the land use was frequent, the degeneration of grassland area was quick from 1989~ 2000. However，it got slow from 2000~2006. With the help of the Markov s model，the change trend of grassland area was predicted by simulation. The prediction showed that the deterioration area of the grassland is keeping expanding，and the area will decrease by 213 600 hm2 from 2006~ 2030.
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