原子吸收光谱法测定与分析榛子抗寒性的研究

以榛子一年生枝条为试材，利用原子吸收光谱法和电导法分别测定与分析榛子3个种(6个无性系)不同低温处理后的K+渗出率和电解质渗出率，并建立了各无性系的低温-K+渗出率及低温–电解质渗出率回归模型。结果表明：利用2种方法综合评价各无性系抗寒能力结果一致，原子吸收光谱法测定K+渗出率指标可作为榛子无性系抗寒性的一种早期鉴定手段;6个无性系抗寒性大小排序为：C₇R₇＞Z-9-40＞C₆R₁＞CS₂R₁＞Z-9-22＞Z-9-30，3个种的抗寒性强弱顺序为：平榛＞平平欧杂交榛＞平欧杂交榛;各无性系半致死温度在-26～40 ℃之间。

Studies on Cold Resistance of Hazel Determined and Analyzed by Atomic Absorption Spectrometry

Using annual branch of hazel as the experimental materials, the K+-leakage and relative electric conductivity of three hazel species (six hazel clones) which had been treated with different low temperature were determined by electro-conductivity gauge and atomic absorption spectrometry. Regression models were established for low temperature to the K+ -leakage or the relative electric conductivity of six hazel clones. The results showed that there was the same result of cold resistance for all clones using the two methods of comprehensive evaluation, and the indicator of K+ -leakage rate determined by atomic absorption spectrometry can be used as a means of early identification of cold resistance of hazel clones. There were obvious differences among the clones in the ability of cold resistance. The order of the ability of cold resistance for the six hazel clones was C₇R₇＞Z-9-40＞C₆R₁＞CS₂R₁＞Z-9-22＞Z-9-30, and the order of the ability of cold resistance for the three hazel species was C. heterophylla ＞C. heterophylla×(C. heterophylla×C. avellana)＞C.heterophylla×C.avellana. The median lethal temperature of tissue for all clones is -26--40 ℃.