利用河北省围场县1951-2010年站点气温资料对其极端温度事件的变化特征进行分析,并讨论其对马铃薯单产的可能影响,得出以下结论:近60 a来极端高温事件呈增加趋势,极端低温事件呈减少趋势;极端高温事件的突变发生在1982年,年极端低温事件的突变发生在1986年;极端温度事件日数与马铃薯单产产量关系不大。 Using the temperature data from 1951 to 2010 in Weichang County, Hebei Province, we analyzed the variation characteristics of extreme temperature events and discussed its possible impact on potato yield. The following conclusions were drawn: the extreme high temperature events showed an increasing trend in the recent 60 years, The occurrence of extreme temperature events was decreasing in 1982; the mutation of extreme high temperature event occurred in 1982; the mutation of extreme low temperature event occurred in 1986; and the number of extreme temperature event days was not related to the yield of potato.