Abstract:
Based on the data of growth period,yield,temperature,precipitation and sunshine hours of winter wheat during 1982—2018 from Xinyuan station,the response of winter wheat to climate change in Xinyuan county in recent 37 years was studied by using linear regression,Pearson correlation coefficient,3 a linear moving average and other statistical methods. The results showed that in recent 37 years the pre-winter growth period of winter wheat in Xinyuan County was significantly delayed,the stage from turning green to milk maturity was significantly advanced. The growth period in spring and summer were mainly affected by the temperature in early and mid-March. The stage of emergence to the beginning of overwintering was shortened significantly,and the stage of milk ripening to maturity was significantly prolonged. There was no significant change in the interval between other growth stages. The whole growth period was shortened because the sowing date was significantly delayed. The climatic yield of winter wheat was significantly correlated with the meteorological elements during the vegetative growth stage. Significant delay in sowing date led to insufficient heat accumulation before winter. It is suggested that sowing date should be about 10 days earlier,which is conducive to forming strong seedlings.