我县属柑桔北缘地带,解放后曾遭受过三次较大的冻害(1955年元月5日为-10℃,1969年元月31日为-10.9℃,1977年元月30日为-13.8℃),不仅解放初期成片的泡柑、建柑、香柑受冻,现已基本无商品生产,就是六十年代后栽植的温州蜜柑,也由于遭受两次冻害加上栽植不讲究质量,致大部分桔树主干受冻或主枝冻枯,生长势弱, My county is the northern margin of citrus, after liberation had suffered three major freeze damage (January 5, 1955 as - 10 ℃, January 31, 1969 - 10.9 ℃, January 30, 1977 as - 13.8 ℃), not only the early liberation into pieces of pickled cabbage, Citrus, Fragrant citrus frost, is now basically no commercial production, is the Sixtieth Year planted Wenzhou Satsuma, but also due to two frost damage plus planting does not pay attention to quality , Resulting in the majority of orange trunk main freeze or main branch freeze, weak growth,