Study on the impact of climate change during rice's growing seasons on rice yield in main region:An empirical analysis based on the extended C-D production function
By establishing an extended C-D production function model and using the rice production and meteorological data of China's 15 rice-producing provinces from 1984 to 2014,an empirical analysis of the influence of climate change in rice's growing seasons on rice production was conducted and the nonlinear and regional difference of climate factors' effects was observed.The results showed that increasing precipitation had a significantly negative impact on rice yield. However,the impacts on different regions were different.Meanwhile,quadratic precipitation had a significantly negative impact on rice yield.On the whole,the precipitation had a negative impact on the northeast,eastern,central and southern regions of China,while had a positive impact on the southwest region.Besides,rising temperature had a significantly negative impact on rice yield and there existed aUshape relationship between temperature change and rice yield.On the whole,the temperature had a negative impact on the eastern,central,southern and southwest regions of China,while had a positive impact on the northeast region.