苹果树秋冬冻害调查及管理对策辛玉成，王先科，王莲，王东昌（山东省莱阳农学院２６５２００）１９９３年１１月中下旬～１２月上旬，由于受强烈冷空气的袭击，急剧降温，致使北方落叶果树区遭受不同程度的冻害，现将我们对山东省部分苹果树受害区域及发生原因调查总结如... Autumn and winter frost damage investigation and management strategies of apple trees Xin Yucheng, Wang Xianke, Wang Lian, Wang Dongchang (Laiyang Agricultural College, Shandong Province 265200) From mid-to-late November to early December 1993, due to the intense cold air attack, the temperature dropped sharply, Fruit trees suffering from varying degrees of frost damage, now we part of the apple tree in Shandong Province victims and the reasons for the survey concluded ...