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以18种(品种)不同地理分布及不同抗寒力的绣线菊为试验材料,通过测定露地自然低温下的抗寒性相关生理指标,应用隶属函数模型、Logistic方程计算生理指标隶属函数值;通过测定冰冻处理枝条电导率计算其半致死温度,根据生理指标隶属函数值和半致死温度确定其抗寒力。结果表明,华北绣线菊、土庄绣线菊、绒毛绣线菊、石蚕叶绣线菊、绢毛绣线菊、金丝桃叶绣线菊、三裂绣线菊抗寒力最强;毛果绣线菊、石棒绣线菊、柳叶绣线菊抗寒力较强。
18 species (varieties) of different geographical distribution and different cold resistance of Spiraea as test material, by measuring the natural low temperature cold resistance related to the physiological indicators of exposure, the use of membership function model, Logistic equation to calculate the physiological index membership function value; The semi-lethal temperature was calculated by measuring the conductivity of the frozen branches, and the cold resistance was determined according to the membership function and the lethal temperature. The results showed that the cold hardiness of Spiraea polyglata, Spiraea rubra, Spiraea rubra, Spiraea cairica, Spiraea polymorpha, Spiraea marmelata and Spiraea marmela were the strongest. Barbary meadowsweet, Ishibata Meridian, Willow Spiraea cold hardiness.