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1965/66、1968/69和1978/79年的冬季,是莫斯科省最近十几年来出现的对果树作物、其中包括梨树极为不利的三个冬季。 1965/66年的冬季并不算严寒,但是初冬的天气却异乎寻常的温和,12月份的月平均温度为一1.6℃,而历年平均是-8.0℃(表1、2)。1968/69年的冬季严寒(11—3月平均温度较历年低1.6℃),1月和2月特别冷。1978/79年冬季较温和(比历年平均温度高0.6℃),但是12月份的月平均温度却为-14.6℃。上述三个冬季温度的变化幅
The winter months of 1965/66, 1968/69 and 1978/79 were the three winters of fruit trees in the Moscow region in the last decade or so, including the extremely adverse effects of pear trees. The winter of 1965/66 was not severe, but the weather in early winter was unusually mild. The monthly average temperature in December was 1.6 ° C, compared to -8.0 ° C over the years (Tables 1 and 2). The severe winter in 1968/69 (average temperature in January-March was 1.6 ° C lower than in previous years) was especially cold in January and February. The winter in 1978/79 was milder (0.6 ° C above the historical average), but the monthly mean temperature in December was -14.6 ° C. The three winter temperature changes in amplitude