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我国北部地区气候寒冷,冬季果树经常发生冻害。目前直观鉴定果树冻害的方法主要有组织褐变法和生长法。其中组织褐变法是用肉眼观察或解剖显微观察髓和木质部等组织,根据颜色变化来加以判断,这种判断存在着很大的人为误差,如果能将果树冻害的鉴定数字化、仪器化,消除人为误差,对研究果树冻害和判断果树抗寒力均会有很大意义。为此,我们根据苹果受冻后枝条木质部褐变现象,于1986～1987年连续2年用薄层扫描机进行检测,以提高肉眼鉴定的准确性,同时对判断苹果的抗寒力也进行了探讨。
Cold weather in the northern part of our country, winter fruit trees often freeze damage. At present, there are mainly methods of tissue browning and growth for the direct visual identification of fruit frost damage. Tissue browning method is the use of macroscopic or anatomical microscopic observation of the pulp and xylem and other organizations, according to the color change to be judged, this judge there is a great human error, if the identification of fruit frost damage digital, instrumental, eliminate Human error, the fruit tree frost damage and cold hard to determine the fruit trees will have great significance. Therefore, according to the phenomenon of browning of xylem in the branches of apple after freezing, we used the TLC scanner for two consecutive years from 1986 to 1987 to improve the accuracy of the visual identification and also to evaluate the cold resistance of apple .