Abstract: Taking Heilongjiang province as case study region,the annual forest Net Primary Production(NPP) was estimated,based on the light utility efficiency model,by using the 1km MODIS data and the sunshine data from 82 meteorological stations in 2006.The remote sensing retrieval of forest NPP in Heilongjiang province was also realized.The results showed that the total forest NPP in Heilongjiang was 120.4×1012g y-1 in 2006,the average value was 545.6g m-2 y-1,the highest value of NPP was 1669g m-2 y-1.There was obvious seasonal change,and the varying curve acted as a single peak value wave.There was also a remarkable latitudinal change,the values in south was higher than north,and east was higher than west.The NPP in Daxing'anling mountain was the lowest,while the highest value was in Laoyeling mountain.The results were accordance to the natural regional distributing of forest NPP in Heilongjiang province.

Key words: Heilongjiang province, Heilongjiang province, Forest, Net primary production(NPP), Light utility efficiency model, Remote sensing retrieval