郧阳位于北纬31.3—33.5°,东径109.5—111.5°之间,具有中纬度北亚热带气候特点。境内山阔地窄,坡多坪少,地多田少,地形复杂,气候多变且差异大,自然灾害频繁,农业生产很不稳定。近几年来,除了严重的干旱影响外,低温冷害对农业生产的影响日趋严重。1980—1982三年中,1980、1982两年均为低温冷害重发生 Yunyang is located at 31.3-33.5 ° north latitude and 109.5-111.5 ° east longitude and possesses the characteristics of northern subtropical climate at middle latitude. The territory of mountainous narrow, less slope more Pingdu, more fields and less terrain, complicated terrain, climate change and differences, frequent natural disasters, agricultural production is very unstable. In recent years, apart from severe drought effects, the impact of chilling injury on agricultural production has become increasingly serious. 1980-1982 three years, 1980,1982 two years are low-temperature chills re-occurred