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1.霜冻: 大理县蚕豆冻害一般有两种情况,一种是苗期地表最低温度下降到-6.0C至-8.0C以下,幼苗期的主茎乃至全株被冻死,称之为苗期冻害。这种情况在全县范围内出现不多,但凤仪公社的个别地区则经常发生。第二种是蚕豆蕾、花、幼荚期最低气温降至-2.0C或以下,蕾、花、幼荚遭受冻害,这是大理县蚕豆冻害中经常出现,为害最大的一种。普查大理县61—80年的低温霜冻资料:最低气温≤1.5℃的出现机率和低温累积值如下表:
Frost: Dali County, broad bean frost damage in general there are two cases, one is the seedling minimum surface temperature dropped to -6.0C to -8.0C below the seedling stage of the main stem and even the whole plant was frozen to death, called the seedling Frost damage. This situation is not much within the county, but individual areas of Fung Yi commune often occur. The second is the broad bean bud, flower, young pod minimum temperature dropped to -2.0C or below, buds, flowers, young pods suffer frost damage, which is Dali County, broad bean frost damage often occurs, the most damaging one. Census Dali 61-80 years of low temperature frost data: the lowest temperature ≤ 1.5 ℃ probability of occurrence and low temperature cumulative value as follows: