一、目的及意义　　　　我省是全国柑桔主产省份之一,主栽无核蜜柑,栽培面积55万亩,总产90余万担,面积及商品量,均居国内重要地位。解放30年来,全省曾发生过三次柑桔大冻害,二次局部性的大冻害。冬季冻害是我省柑桔生产发展的一大障碍,引起了有关部门的高度重视。　　　　我省 First, the purpose and significance of the province is one of the main citrus provinces, the main planted without nuclear oranges, cultivation area of ​​55 hectares, the total output of more than 90 million, the size and the amount of merchandise, both occupy an important position in China. In the 30 years since the liberation, there have been three major freeze-harms of citrus in the province, with a large amount of secondary freezing damage. Winter frost damage is a major obstacle to the development of citrus production in our province, causing the relevant departments to attach great importance. My province