本文对陕西省林科所新培育的２个泡桐无性系及４个对照泡桐无性系（种），用电导仪和原子吸收分光光度计分别测定了苗杆经不同低温处理后的电解质渗出率及钾离子浓度渗出率。测定结果经统计分析，综合评定出６个无性系（种）相对抗寒次序为：兰考泡桐＞８４１２—２＞陕桐一号＞８４１１—１０＞豫杂一号）８４１１—２。 In this paper, two new Paulownia clones and four control Paulownia clones cultivated in Linke, Shaanxi Province were used to measure the electrolyte exudation rate of seedling stems after treated with different low temperature by using conductivity meter and atomic absorption spectrophotometer And potassium ion exudation rate. The results of the analysis by statistical analysis, a comprehensive assessment of the relative cold resistance of six clones (order): Paulownia> 8412-2>>>>;