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为了解释抗寒锻炼期果园气温变化对库尔勒香梨不同越冬期抗寒性的影响,连续测定了2年不同越冬期间库尔勒香梨树干阳阴面形成层、一年生枝条和花芽等器官和组织的SOD、CAT、POD酶活性、可溶性蛋白含量、相对电导率、果园气温等生理指标和环境因子;采用隶属函数综合评价2年不同越冬期抗寒性,分析抗寒锻炼期气温与不同越冬期抗寒性变化之间的关系。抗寒锻炼期间气温变化一定程度上影响不同越冬期库尔勒香梨表现出的抗寒性,抗寒锻炼期气温波动性小的年份不同越冬期表现出的抗寒性强于气温波动性大的年份;不同生理指标与气温均呈负相关,其中气温与保护酶呈极显著性负相关,生理指标中可溶性蛋白和POD对库尔勒香梨抗寒性的贡献率比其它生理指标大;总体上库尔勒香梨属于抗寒性品种。
In order to explain the effect of orchard temperature on the cold-hardiness of Korla fragrant pear in different wintering periods during the cold-hardening period, the SOD, the annual shoots, flower buds and other organs and tissues of the Korla fragrant pear trunk, CAT, POD activity, soluble protein content, relative electric conductivity, orchard temperature and other physiological indices and environmental factors. The membership function was used to evaluate the cold resistance of winter over two different years. The relationship between changes. The change of temperature during cold stress affected the cold resistance of Korla fragrant pear in different wintering periods to some extent, and the cold resistance in different wintering periods in years with small temperature fluctuation during cold hardiness period showed stronger cold resistance than those with large temperature fluctuation ; Different physiological indicators and the temperature were negatively correlated, in which temperature and protective enzymes showed a significant negative correlation, the physiological indicators of soluble protein and POD cold hardiness of Korla pear contribution rate greater than other physiological indicators; overall Korlakang Pear are cold-resistant varieties.