Abstract: Based on the data of late rice yields from 1971 to 2004 in 52 counties of Zhejiang Province,the integrate risk index(IRI) based on average yield reduction ratio,the variation coefficient,the risk index were calculated to classify late rice yield losses in the agro-meteorological risk regions.The temperature,precipitation and disasters data mainly related to the agro-meteorological disaster during the rice growing period was identified.The variability of the rice yield were analyzed for the different risk regions.The results indicated that in the regions where IRI was with >0.3 there were largest losses on the annual yield;In the regions where IRI ranged from 0.20 to 0.30,the yield was stable.In the areas where the IRI was with <0.20 there were more bumper harvest years than poor harvest years.These results would provide scientific gist for the insurance company by establishing insurance regions and fee-ratio.

Key words: Late rice, Late rice, Agro-meteorological disaster, Risk regionalization, Zhejiang Province