湖南、湖北两省的柑桔产区,由于常受冬季强寒湖、大雪(或雨凇)以及较重霜冻等天气的危害,致使柑桔产量,时起时落,变幅甚大。自二十世纪初期至1949年的半个世纪中,湖南就遭受过1905、1916、1929～1930年的前后三次大冻;在此期间,湖北亦曾在1921、1930、以及1933年经历过三次冻害。 解放后,除湖北部分地区遭受过1964年的寒害, Citrus growing areas in Hunan and Hubei Provinces are often affected by the weather in winter, such as strong cold and cold lakes, heavy snow (or rain) and heavier frost, resulting in a sharp increase in citrus production. During the half century from the early twentieth century to 1949, Hunan suffered three large frosts from 1905 to 1916 and from 1929 to 1930. During this period, Hubei also experienced three times in 1921, 1930 and 1933 Frost damage. After the liberation, in addition to parts of Hubei suffered 1964 cold damage,