延安日光温室冬季低温冻害天气分析与预报

通过对延安市强降温发生过程中温室内外温度的对比分析,得出当环境气温降到-20℃以下时,即使采取防寒措施,温室内温度也会降至0℃以下,喜温作物可能受冻。因此,以最低气温-20℃作为温室可能发生冻害的指标,利用30年实测气象资料,对延安地区进行了冻害区域划分;根据环流形势进行不同方式的预报服务。

Analysis and Prediction of Winter Low Temperature and Freezing Injury Weather in Sunlight Greenhouse in Yan'an

Based on observed meteorological data for 30 years in Yan'an district, the temperature both inside and outside the greenhouse during strong temperature drop process was compared. It is concluded that the thermophilous crops planted in the greenhouse would be damaged, when the air temperature dropped to -20 outside the greenhouse and the temperature would be under 0inside the greenhouse, even though the protection measures were adopted. Taking -20as a critical temperature at which the plant freezing injury would occur, the freezing zone was divided in the Yan'an district. The different forecast service patterns were put forward according to the air circulation status.