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我省近几年来,苹果矮化栽培发展很快,矮化中间砧多采用M系为主,MAI系为辅。由于引入时间短,对矮砧的抗寒性缺乏系统的观察。1976年冬到1977年春的低湿,给鉴定矮化砧的抗寒性创造了条件。据熊岳气象站观测:1976年12月下旬日平均气温-12.8℃,比正常年平均低4.9℃。1977年1月份日平均气温为-19.9℃,比常年平均低3.8℃。极端最低温度为-28.5℃,比历史最低
In recent years in our province, dwarfing apple cultivation developed rapidly, dwarf intermediate anvil and more use of M-based, MAI supplemented. Due to the introduction of a short time, the cold an d lack of systematic observation of the cold. The low humidity from the winter of 1976 to the spring of 1977 created the conditions for identifying the cold resistance of dwarfing anvil. According to Xiong Yue weather station observation: in late December 1976 the average daily temperature of -12.8 ℃, 4.9 ℃ lower than the average annual average. January 1977 average daily temperature of -19.9 ℃, 3.8 ℃ lower than the average annual average. Extreme minimum temperature of -28.5 ℃, the lowest than the history