【Objective】Based on the analysis of the spatial and temporal patterns of the use efficiency of rice growth season in the rice production region of Southern China during 1951 to 2010, this study could provide a insight to improve rationally arrange rice production activities under global warming. 【Method】 In this study, classification method of cropping system referred to previous work was used to divide the rice production region of Southern China into 16 zones. And assuming the breed collocation is unchang...