Global climate warming is an indisputable objective fact,and it inevitably impacts agricultural water use and grain security production in China.In this paper,the Palmer drought severity index(PDSI),the gross irrigation quota(GIQ)and the per-hectare grain output(PHGO)were used as specific indexes of climate change,agricultural water use and grain production to analyze inter-annual variation characteristics and correlation between PDSI,GIQ,PHGO in China from 1949 to 2005,and a good linear correlation between...
修改评论