Abstract:

Comparison of NPP model of natural vegetation among Miami model, Thornthwaite Memorial model, Chikugo model, Synthetic model and Beijing model has been done based on 125 sets of natural mature forest NPP data in China and 23 sets of NPP of natural vegetation obtained during IBP by Efimova, including forest, grassland and desert. The result shows that Chikugo model, Synthetic model and Beijing model can simulate NPP of natural forest, however, the two latter can simulate NPP of natural vegetation better in semiarid and arid areas than the former. The distribution of NPP of natural vegetation in China and its response to global warming are also presented in this paper. The NPP of natural vegetation in China increases from northwest to southeast, and will increase in different degrees under global climate change. The NPP of natural vegetation will increase more in moist area, and less in semiarid and arid areas. The limitation factor of NPP is the shortage of water.

Key words: NPP, Model, Global clim ate change