集安县地处吉林省最南端、素有吉林省小江南之称。为了建立吉林省的大苹果基地,集安县果树场在大禹山下,二十余年来先后栽植苹果树十二万株。当地虽因冬季气温较低,时有寒流侵袭,但由于采取防寒措施,尚能化险为夷,而1980年冬至1981年春,吉林省东部山区气候反常,果树普遍发生冻害,其中集安县果树场的果树冻害尤为严重,个别地块大苹果成片冻死,减产幅度极大。为摸清冻害情况, Ji’an County is located in the southernmost tip of Jilin Province, known as the small Jiangnan said. In order to establish a large apple base in Jilin Province, Ji’an County fruit tree farm in Dayu Mountain, more than 20 years has planted 120,000 apple trees. Due to the low winter temperatures and sometimes the cold currents, the winter frost damage measures can still save the day. In the winter of 1980 to the spring of 1981, the climate in the eastern mountainous area of ​​Jilin Province was anomalous and frostbite occurred in fruit trees. Fruit frost damage in fruit trees in Ji’an Particularly serious, individual blocks of large apples freeze-dried, greatly reduced production. To find out the frost damage situation,