The ground meteorological data and AVHRR NDVI data have been used to assess the absorbed photosynthetically active radiation(APAR)by the vegetation in Guangdong,China.By the aid of WeatherMan program,the ground meteorological data was used to calculate the PAR and GIS(ARC/INFO)interpolation tools were exploited to create spatial surface of PAR from point layer.Then we estimated the fraction of PAR absorbed for each month during 1992 04～1993 03.The results showed that during this period,the annual APAR in ...