【摘要】 根据青海省东部农业区1961—2020年日最低气温资料，对青海省东部农业区的霜冻变化特征和对主要农作物的影响进行分析。结果表明：近60年来青海省东部农业区平均初霜日出现在9月9日—10月21日，平均终霜日出现在4月9日—5月27日，平均无霜期为105～194 d，平均霜冻日数为140～199 d。大部分地区初霜日推迟、终霜日提前、无霜期延长、霜冻日数减少，20世纪70年代与21世纪初最明显。气候变暖影响到初、终霜冻日数的明显变化，早霜冻对农作物的影响不大，晚霜冻的出现会对处于苗期的作物产生危害。更多还原

【Abstract】 According to the daily minimum temperature data in the eastern agricultural region of Qinghai Province from 1961 to 2020, the characteristics of frost change and the impact on major crops in the eastern agricultural area of Qinghai Province were analyzed. The results showed that the average initial frost day in the eastern agricultural region of Qinghai Province occurred from September 9 th to October 21st, and the average final frost day occurred from April 9th to May 27 th. The average frost-free period was 105～194 days, and the average frost day was 140～199 days. In most regions, the initial frost day is delayed, the final frost day was advanced, the frost-free period was extended,and the frost days were reduced, with the most obvious in the 1970 s and early 21st century.Climate warming affects the obvious changes of the initial and final frost days, the impact of initial frost on crops was generally small,and the impact of final frost will cause harm to crops at the seedling stage.更多还原