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以朱顶红品种‘孔雀花’、‘凤蝶’和孤挺花为试材,研究其在不同低温处理条件下的外部形态变化以及相对电导率变化规律,并配合Logistic方程计算出各自的半致死低温,比较这些品种相对抗寒性的强弱。结果表明:朱顶红和孤挺花的叶片相对电导率均随温度降低呈S型上升,而且形态上观察受冻情况与电解质外渗率的变化趋势基本相符。‘孔雀花’的半致死低温为-1.99492℃,抗寒性明显偏低;而‘凤蝶’和孤挺花的抗寒性明显强于‘孔雀花’,孤挺花的半致死低温为-6.17733℃,‘凤蝶’的半致死低温为-7.69215℃,二者半致死温度相接近,属于耐寒力较强的品种。
Taking the amaryllidaceae varieties ’Peacock’, ’Papaver somniferum’ and ’Amaryllis’ as tested materials, the external morphological changes and the relative conductivity changes under different low temperature treatments were studied, and the Logistic equation was used to calculate their respective semi-lethal low temperature , Compare the relative cold resistance of these species strength. The results showed that the relative conductivity of the leaves of Amaryllis hortensis and Amaryllis increased with the decrease of temperature, and the morphological observation of the freezing situation corresponded basically with the trend of electrolyte leakage rate. ’Peacock’ semi-lethal low temperature of -1.99492 ℃, cold resistance was significantly lower; ’Papilio’ and Amaryllis is significantly stronger than the ’peacock’ cold resistance, semi-lethal low temperature - 6.17733 ℃, ’Papilio’ semi-lethal low temperature of -7.69215 ° C, both close to the lethal temperature, are strong cold hardy varieties.