常绿阔叶树种小果卫矛引种北京的抗寒性比较研究

Comparative Research on Cold Resistance of Euonymus microcarpus (Oliv.) to Beijing,a Evergreen Broad-Leaf

为了丰富北京冬季植物景观,于2003年从山西省垣曲县引进常绿阔叶树种小果卫矛,并以大叶黄杨、北海道黄杨、胶东卫矛、小叶黄杨和女贞为对照,采用形态观测法与电导法对其进行抗寒力分析测定。结果表明:小果卫矛有较稳定的电导率,其叶片半致死温度高于大叶黄杨、胶东卫矛和女贞,枝条半致死温度高于大叶黄杨和女贞,在北京可露地引种种植;利用电导法测定的抗寒性与越冬形态表现的观察结果一致。

In order to enrich the winter landscape in Beijing, the introduction of a evergreen broad-leaf plant-Euonymus microcarpus from Yuanqu county of Shanxi province to Beijing in 2003 was conducted. Comparing with Euonymus japonicus, E. spp. , E. kiautschovicus. , Buxus microphylla and Ligustrum lucidum, the methods of morphological observation and electrical conductivity were used to determine the cold resistance of Euonymus microcarpus. The results show that, E. microcarpus has a comparatively stable electrical conductivity rate, the semilethal low temperature of its leaf is higher than E. japonicus, E. kiautschovicus and L. lucidum, and the semilethal low temperature of its tress is higher than E. japonicus and L. lucidum, which can be introduced in Beijing; the result of cold resistance determined by electrical conductivity method showed in accordance with the observation of its over-wintering morphology.