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采用差热分析系统(Differential Thermal Analysis,DTA)对不同葡萄砧木和栽培品种进行低温放热分析(Low temperature exotherms analysis,LTE),建立各品种芽的温度—伤害度LT–I(Lethal Temperature–Injury)回归直线。回归方程斜率(lethal temperature coefficient,Qlt)代表温度每降低1℃芽增加的伤害程度,反应不同品种对降温的敏感性。利用隶属函数度法对LT20~LT80进行排序,发现赤霞珠芽抗寒性最差,摩尔多瓦次之,威代尔、香赛罗、110R、3309C、140Ru、北醇、1103P和101-14 Mgt抗寒性强,Frontenac、贝达、5BB和SO4抗寒性最强;深休眠后的葡萄芽抗寒性增强,1月中旬芽的抗寒性明显强于11月末的芽。
Low temperature exotherms analysis (LTE) was conducted on different grape rootstocks and cultivars using differential thermal analysis (DTA) to establish the temperature-injury degree LT-I (Lethal Temperature-Injury Regression straight line. The lethal temperature coefficient (Qlt) represents the degree of damage increased for each 1 ° C decrease in temperature, reflecting the sensitivity of different species to cooling. Using membership function method to rank LT20 ~ LT80, it was found that the cold resistance of Cabernet Sauvignon was the worst, followed by Moldova, VW, Chassis, 110R, 3309C, 140Ru, Behenyl Alcohol, 1103P and 101-14 Mgt Cold hardiness, Frontenac, Beda, 5BB and SO4 had the strongest cold resistance. The cold hardiness of grape bud after deep dormancy increased, and the cold resistance of mid-January bud was stronger than that of late November bud.