By means of Remote Sensing

the estimation of biomass and NPP mainly is on the basis of the models of solar energy efficiency. The biomass and NPP can be calculated through the relation among NPP

APAR and the rate （ε） of which transform APAR to the organic matter. The model is:NPP=（FPAR×PAR）×[ε *×σ T×σ E×σ S×（1-Y m）×（1-Y g）] On the basis of RS and GIS

the net primary production of terrestrial vegetation of China in every ten days using the NOAA AVHRR data with five channels and 8km×8km resolution cell was calculated. And then the annual NPP was accumulated. The result shows the total NPP of terrestrial vegetation of China is 6.13×10 9t/a in 1990 and the maximum NPP is 1812.9 gC/m 2. According to this result

the spatial distribution of NPP shows a decreasing trend from south-east China to north-west China. The distribution may have close relationship with the distribution of vegetation. The NPP varies with the different vegetation. It is indicated that the NPP of conifer

broadleaf

shrubbery

grassland

meadow/morass

desert

and corn are 1031.92 gC/m 2

1023.60 gC/m 2

822.99 gC/m 2

502.10 gC/m 2

690.86 gC/m 2

132.21 gC/m 2 and 891.18 gC/m 2 respectively. According to the yearly NPP

the NPP of shrubbery is 1621.07×10 6 tCa -1 accounting for the largest part of China （26.4%）. The sequences of the other vegetation types are forest and corn

grassland

meadow and desert. The yearly NPP of them are 1490.28×10 6tCa -1（24.3%）

1485.54×10 6tCa -1 （24.2%）

722.83×10 6tCa -1 （11.8%）

566.13×10 6tCa -1 （9.2%） and 216.13×10 6tCa -1 （3.52%） respectively. The NPP of different land use types shows that the NPP of forest

agriculture land

grassland

water area

inhabitant area

wasteland and hard-using land are 966.08 gC/m 2

897.15 gC/m 2

545.92 gC/m 2

656.28 gC/m 2

550.46 gC/m 2

299.74 gC/m 2 and 106.56 gC/m 2. According to the yearly NPP

the NPP of forest is 2096.87×10 6tCa -1 accounting for the largest part of China （34.2%）. The sequences of the other vegetation types are grassland

agriculture land

wasteland

hard-using land

water area and inhabitant area. The yearly NPP of them are 1911.41×10 6tCa -1 （31.2%）

1760.57×10 6tCa -1 （28.7%）

193.96×10 6tCa -1

125.92×10 6tCa -1

51.62×10 6tCa -1 and 3.84×10 6tCa -1 respectively.