| Using the ground parallel observation data,the response of winter wheat to the climate warming on Loess Plateau of east Gansu was compared and analyzed.The result showed that the response of winter wheat to the climate warming was mainly that whole growth period and the winter period have been shortened;reviving period and maturity period has been advanced since 1981.The response to temperature increase is distinct in different growth phases,temperature increase makes reviving-rising-jointing of alimentation growth phase and blooming and maturity of procreation growth phase earlier,the days of milk maturity and blooming to maturity phase change not distinctly,but temperature increase leads to prolonging of blooming to milk maturity,shortening of days of milk maturity to maturity.The yield increases with increase of the lowest temperature,≥0℃,≥5℃,≥10℃and ≥15℃ accumulated temperature,and reduce with increase of ≥20℃ accumulated temperature,which indicates that the high temperature weather compels to mature and reduces output of winter wheat yield. |