一、项目背景低温冻害是危害新疆特色林果业持续高效发展的三大灾害之一。项目通过对越冬期间果树冻害历史灾情资料的调查和最低气温数据库的建立,阐明果树越冬冻害与气象因子的关系。结合低温处理试验,研究冻害发生过程中巴旦杏果树细胞质膜透性、叶绿素荧光参数等生理生化特征,进行冻害分级,探讨冻害发生过程中果树生理生化变 I. Project Background Low-temperature frost damage is one of the three major disasters that endanger the sustainable and efficient development of Xinjiang’s characteristic forestry and fruit industry. The project investigates the historical disaster data of fruit frost damage and the establishment of the minimum temperature database during the wintering period to clarify the relationship between fruit trees overwintering frost damage and meteorological factors. Combined with low-temperature treatment, the physiological and biochemical characteristics such as plasma membrane permeability and chlorophyll fluorescence parameters in the apricot fruit during freezing injury were studied, and the frost damage classification was conducted to investigate the physiological and biochemical changes of fruit trees during frost damage