八种常绿阔叶树种抗寒性的研究

The Study on Freezing Resistance of 8 Broad-leaved Evergreens

以引自亚热带北缘的８种常绿阔叶树为试材，分别对树叶、当年生枝条经过０、－１０、－２０、－３０、－４０℃冷冻处理后，用电导法、电阻法、气孔行为观察法、组织水势法对其抗寒性进行测定。并对其抗寒性指标进行了模糊聚类分析、主成分分析和模糊相似优先比分析，确定了常绿阔叶树种引种到济南的优化链．

The experiments on freezing resistance of 8 broad-leaved evergreens introduced from north edge of subtropical region were carried out. Their leaves and current twigs were treated with 0, -10, -20, -30, -40℃ and determined the freezing resistance with electrical conductivity, electrical resistivity, stomatal action observation and tissue tension method. Then the data were analyzed with fussy clustering analysis, principal component analysis and fussy similiar priority ratio method. An optimized chain of broad-leaved evergreen trees that would be introduced to Jinan was determined.