Abstract: The impact of increasing atmospheric aerosol on climate and environment caused serious concern in recent years,among which the aerosol radiation effect on crops and eco-system was more complicated.The impacts of scattered radiation and direct radiation on radiation use efficiency were discussed,according to radiation characteristics and its effect on crop photosynthesis,production and ecological systems.The results showed that atmospheric aerosol affected crop photosynthesis through increasing the scattering radiation and raising the solar energy utilization rate of shaded leaf.Moreover,the impact of atmospheric aerosol on crop yield was related to cloud conditions.In conclusion,aerosol radiation effect had positive impact on NEE and NPP enhancement.

Key words: Aerosol, Aerosol, Scattered radiation, Radiation use efficiency, Ecological effect