A FOREST VEGETATION NPP MODEL BASED ON NDVI

A net primary productivity (NPP) model of forest vegetation in China is presented based on LAI and NDVI whereby: NPP = -0.6394 - 67 064ln(1-NDVI)This model was established to simulate the NPP of forest vegetation in China according to a comparison of forecasted with observed forest NPP data for spruce forest, pine forest, evergreen broad leaved forest, deciduous and evergreen broad leaved forest, mixed coniferous broad leaved forest etc. Correspondence with observed data was good. Based on a comparison of the simulated data with the Chikugo and Synthetic Models (Zhou Zhang,1996) and with the new model, shows the latter gives better results from the Chikugo and Synthetic models at a general level. This suggests that the new model based on NDVI is suitable to Chinese forest vegetation, and that it can be used to monitor and forecast the dynamics of NPP in Chinese forest vegetation.