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近年来,不少苹果园冬季剪口枝芽冻害比较严重。为此,我们于1990年对新红星、红富士、烟青、国光等品种的3～5年生幼树,进行了年底12月下旬和早春9月中旬两个时期修剪的对比,1991年春发芽时对冻害及腐烂情况进行调查。结果:国光、烟青两品种的冻害与修剪时期无明显相关性,且冻害
In recent years, many apple orchard winter shearing frostbite more serious injury. For this reason, we compared the pruning of three to five year-old saplings of New Red Star, Red Fuji, Yanqing and Guoguang in the end of December and early September and mid-September of each year. When the spring of 1991 germinated Investigate frost damage and decay. Results: There was no significant correlation between the frost damage of Guoguang and Yanqing cultivars during the pruning period and the frostbite