Abstract: Using Miami model,Thornthwaite model and Comprehensive model,NPP in Zhejiang Province was calculated to find an optimal model through comparing the calculating results with the values by IBP recommended. Then,the characters of annual and decadal NPP were analyzed. Based on the multiplex regression equation,the NPP was carried out spatial interpolation with longitude,latitude,DEM and its derived data. And spatial distribution of NPP was investigated. The results showed that (1) the calculation of comprehensive model was between 952.722 and 1376.971g m-2 per year,which was most close to the recommended values,and NPP wavelike ascended with time. (2) For the three NPP models,the maximum appeared in Jiaxing of the north and the minimum value appeared in Wenzhou of the south. NPP's spatial distribution of the three models all showed that the lower value appeared in northwest and the higher appeared in southeast. (3)Comprehensive model were more feasible to calculate NPP of Zhejiang Province.

Key words: Zhejiang Province, Zhejiang Province, Vegetation Net Primary Productivity(NPP), Miami model, Thornthwaite model, Comprehensive model