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1 冻害发生情况2002年12月下旬至2003年1月上旬,新疆哈密地区出现了1958年以来最罕见的低温降雪天气,最低气温降到了-28.9℃,-26℃以下的气温持续了9 d(天),-20℃以下的气温持续了25 d(天),使哈密地区的果树遭受了历史上最严重的冻害,果农遭受了巨大的经济损失。经详细调查,全地区现有果树面积1.17万hm~2,受冻害面积5 533 hm~2,占果树总面积的47.1%。其中463 hm~2梨树、100hm~2桃树全部冻死,105hm~2苹果花芽受冻率达100%,部分枝条由于受冻而抽干,725 hm~2
1 frost damage occurred in late December 2002 to early January 2003, Xinjiang Hami area appeared since 1958 the most common low temperature snowfall, the minimum temperature dropped to -28.9 ℃, -26 ℃ below the temperature lasted 9 d ( Day). Temperatures below 20 ° C lasted 25 d (days), causing the fruit trees in Hami to suffer the most serious frost damage in history. The farmers suffered great economic losses. After detailed investigation, the existing fruit tree area in the whole region is 11.7 thousand hm ~ 2, and the frost damage area is 5 533 hm ~ 2, accounting for 47.1% of the total fruit tree area. Among them, 463 hm ~ 2 pear trees and 100hm ~ 2 peach trees all froze to death, and the freezing rate of flower buds of 105hm ~ 2 apples reached 100%. Some branches were drained by freezing and 725 hm ~ 2