【摘要】 以北方地区常见的10种落叶乔木的当年生休眠枝条为试材,采用人工低温诱导的方法,测定并分析了它们在不同处理温度和不同时间下的电解质外渗率、可溶性糖、可溶性蛋白质含量及O^·₂产生速率;用电解质外渗率结合Logistic方程拟合推算出各树种的低温半致死温度,并应用隶属函数法进行抗寒力排序。结果表明:10个树种的抗寒性由强到弱依次为苦楝、白蜡、龙爪槐、二球悬铃木、银杏、五角枫、白杜、柿树、碧桃、紫叶李。研究结果可为高寒地区园林绿化乃至荒山治理树种的选择、引种及栽培管理工作提供理论参考。更多还原

【Abstract】 Taking one-year-old dormant shoots of ten common deciduous garden arbors of Northern region as test material,the changes of their electrolyte leakage-rate,soluble sugar,soluble protein and O^·₂ generation rate under artificial low temperature were studied,aimed to analyze the differences of ten trees in different temperature and times.The semi-lethal temperature calculated by the Logistic equation of electrolyte leakage rate,and combined with the subordinate function method to make a comprehensive hardiness evaluation.The results showed that Melia azedarach Linn.was shown to be the most cold resistance,followed by Fraxinus chinensis,Sophora japonica ‘Pendula’,Platanus acerifolia Willd,Ginkgo biloba L.,Acer elegantulum Fang et P.L.Chiu,Euonymus mssckii Rupr.,Diospyros kaki Thunb.,Prunus persica Batsch.var.duplexRehd.,and Prunus cerasifera Ehrhar f..Results would be consulted by landscaping in cold areas,or the choice,introduction and cultivation of barren hills governance trees.更多还原