核桃枝条电解质渗出率与抗寒性的关系

A Study on the Relationship between Electrolyte Osmotic Rate of Branches of Walnuts and Coldresistance

通过对在不同低温处理下的不同品种不同树龄的不同采样地点的1年生核桃枝条电解质渗出率与抗寒性的关系进行研究,结果表明:1.比较核桃品种间抗寒性差异时可以-25℃处理时的枝条电解质渗出率作为参考;2.品种间和处理温度间的电解质渗出率均存在极显著差异,核桃枝条电解质渗出率随处理温度的降低而逐渐升高,呈S型曲线变化;3.不同树龄间的电解质渗出率存在显著差异,核桃成龄树1年生枝条抗寒性略高于幼龄树;4.管理水平高的汾阳所采样低温处理后电解质渗出率显著低于管理水平低的祁县所采样,说明前者的抗寒性显著高于后者,这可能与采样地的自然环境条件及园地管理水平有关。

The relationship between the electrolyte osmotic rate and cold resistance of walnut branches from different varieties of different tree ages collected from different sampling locations was studied under different low temperature treatments. The results showed ： 1. The electrolyte osmotic rate of the branches treated at - 25 ℃ could be used as the reference for the comparison of cold resistance among varieties. 2. There were extremely significant differences in the electrolyte osmotic rates among varieties and treating temperatures. It increased with the decrease of treating temperature, taking the shape of letter S. 3. There were significant difference in the electrolyte osmotic rates among different tree ages; the cold resistance of adult trees was higher than that of younger trees. 4. The samples from Fenyang, which is better managed, had obviously lower electrolyte osmotic rate than those from Qixian, which inclecated that their cold resistace was significantly higher than the latter, maybe related with the natural environment and orchard management.