关键词:园林植物； 冬绿地被植物； 定点观察； 耐寒性； 电导法； TTC法
Key words:Landscape Plants; Wintergreen Groundcover Plants; Observation on Fixed Spot; Coldness Resistance; Electric Conductivity; TTC Activity Method
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——朱云华 芦建国 徐友新[ZHU Yun-hua, LU Jian-guo, XU You-xin]　(2007年 第08期 页码/Page:20)

摘要:在定点观察的基础上，结合引种栽培和定量分析，对12种冬绿地被植物的耐寒性进行了研究。结果表明：(1)野外越冬观察：2001年冬季最低气温－8.4℃，12种冬绿地被植物都能安全越冬，且第二年春季恢复生长良好。蔓长春花嫩梢和部分叶片受冻枯死。吉祥草叶片1/3以上受冻，呈黄褐色。无毛紫露草叶片段1/2以上受冻变黑。其他种类植株地上部分未显示受冻特征。(2)电导法测定叶片耐寒性：经－10℃的低温处理后，表现出极强耐寒性的种类分别是：矮山麦冬、虎耳草、青绿苔草；其他种类耐寒性由强至弱依次为：活血丹、顶花板凳果、蔓长春花、凹叶景天、扶芳藤、刺果毛茛、紫露草、吉祥草、玉竹。(3)TTC法测定根活力：经－10℃的低温处理后，耐寒性极强的种类分别是：顶花板凳果、虎耳草、扶芳藤、凹叶景天、矮山麦冬、活血丹，其他种类耐寒性由强至弱依次为：青绿苔草、刺果毛茛、蔓长春花、吉祥草、紫露草、玉竹。

Abstract:On the basis of fixed-spot observation, and combining with introduction and cultivation, and the quantitative analysis, the coldness-resistance of 12 wintergreen groundcover plants were studied. The results showed that: (1) The outdoor winter-through observation results: the lowest atmospheric temperature was -8.4℃ in the winter of 2001, and 12 wintergreen groundcover plants all survived in the winter safely, and they restored to well growth in the Spring of the second year. Vinca major shoots and parts of the blades were frozen, Reineckea carnea above the 1/3 part of the foliages were frozen to be tan. Tradescantia virginiana above the 1/2 part of the foliages were also frozen to be black. Other kind of plants had no such frozen characteristics. (2) The method of electric conductivity to determine coldness-resistance: after -10℃ lowest temperature treatment, the order of those with strong coldness-resistance was Liriope minor > Saxifraga stolonifera > Carex leucochlora, and the others from strong to weak were as the following: Glechoma longituba > Pachysandra terminalis > Vinca major > Sedum emarginatum > Euonymus fortunei > Ranunculus muricatus > Tradescantia virginiana > Reineckia carnea > Polygonatum odoratum. (3) The method of TTC to determine root vigor: after -10℃ lowest temperature treatment, the order of those with strong coldness-resistance was Pachysandra terminalis > Saxifraga stolonifera > Euonymus fortunei > Sedum emarginatum > Liriope minor > Glechoma longituba, and the others from strong to weak were as the following: Carex leucochlora > Ranunculus muricatus > Vinca major > Reineckia carnea > Tradescantia virginiana > Polygonatum odoratum.