Used CASA model to calculate the NPP in August three years of the study area and analyze the product, change and characters effected by LUCC of the NPP.

• 三年间中产区以下的各NPP产量水平区面积比重及NPP区域生产总量均逐年增加,而高产区以及较高产区NPP面积百分比及NPP区域生产总量逐年减少,2004年较高产区面积比重及NPP产量下降最为剧烈。