2002年冬季华北地区气候异常多变,初冬季节出现了寒流的侵袭,气温急剧下降,进而又下起大雪,之后就出现了长时间的低温天气,据气象部门提供的资料表明,这是该地区近50年以来最冷的年份。寒冷天气使大部分果树遭遇了冻害,尤其是冬枣树受到的冻害更为严重。原本抗寒性能较好的冬枣 In the winter of 2002, the climate in North China was unusually changeable. In the early winter, there was a cold current. The temperature dropped sharply, and then snowed again. After a long period of cold weather, the meteorological department showed that it was the region The coldest year in nearly 50 years. Cold weather most of the fruit trees suffered frost damage, especially winter jujube trees suffered more serious frost damage. Had better winter performance jujube