Influence of Climate Change on Meteorological Yield of Maize in Jilin Province

The data of meteorological and maize production of Lishu county in Jilin province during 1986-2008 were used,in order to analyze regulation of climate change and its influence on maize meteorological yield,it was on the base of the relationship between meteorological yield of maize and accumulated temperature,rainfall and sunshine hours.The result showed meteorological yield of maize(Yw) had a significant positive correlation with rainfall(x1),a negative correlation with accumulated temperature,had no correlation with sunshine hours.Meteorological yield of maize had a significant quadratic linear regression correlation with rainfall and accumulated temperature during growth stage:Yw=15 768.77+2.87x1-5.42x2,r=0.63.The average temperature and accumulated temperature were increased 0.05 ℃ and 10 ℃ in Jilin Province throughout the growth period annually,rainfall was decreased around 5mm per year,sunshine hours had no change significantly.With the intensify of the phenomena of climate warming and rainfall reduction in Jilin Province,the impact on drought and maize yield will become heavy.