Abstract: Based on the 1951-2004 climate data from 86 meteorological stations in Guangdong Province,the chilling injury losses during 1955-2004,and the present research achievements,this paper studied the disaster-inducing factors and integrated climatic index for banana and litchi chilling injuries.The results showed that the critical temperature for banana and litchi chilling injuries could be determined as 5.0℃.The disaster -inducing factors included extreme minimum temperature,maximum temperature drop range,persisting days of low temperature and harmful chilling accumulation,and there were obvious correlations among these factors.According to the method of principal component analysis,an integrated climatic index was obtained,which optimally synthesized these four factors,and had clear physical meaning.Integrated climatic indexes of chilling injury in 86 stations were calculated by using the weights of these four disaster-inducing factors in Guangzhou.The value of integrated climate index of chilling injury was negatively related with the yield of banana and litchi,and could be used to analyze the degree of banana and litchi chilling injury.

Key words: Artificial broad-leaved Korean pine forest, Species diversity, Productivity