武威12个外来优良园林树种耐寒性测定

Study on Cold Tolerance of 12 Foreign Tree Species in Wuwei

选取武威荒漠绿洲已引种成功的紫叶风箱果、金叶锦带、金叶风箱果等12个园林树种,以其枝条为测试材料,通过低温处理后,进行了耐寒性试验。结果表明:各树种半致死温度(TL50)能定量反映这些树种耐寒能力的高低,并且与它们在武威越冬适应性观察、受冻后恢复生长试验结果基本一致,各树种TL50从大到小排序是:金叶榆﹥小叶水蜡﹥金叶莸﹥金叶风箱果﹥紫叶矮樱﹥紫叶风箱果﹥红瑞木﹥紫叶锦带﹥金叶锦带﹥黄栌﹥红叶碧桃﹥美人梅。

Selection of 12 garden tree species which had been success introduced in Wuwei desert oasis. And with the branches for test materials. The result showed that Electric conductivities of excised - branches under simulated freezing treatment were measured and lethal temperature 50 were calculated. The results could correctly indicate low temperature tolerance of these trees in quantitative determination, and be corresponding to observation of wintering in Wuwei. The sort were Ulmus pumila cv. jinye Ligustrum quihoui 〉 Caryopteris dandonensis 〉 Physocarpus opulifolium 〉 Prunus cistena 〉 Physocarpus opulifolium 〉 Comus alba 〉 Weigela Florida 〉 Weigela ＇Red Prince＇ ＋ vat. 〉 Cotinus coggygria 〉 Prunus persica 〉 Prunus blireana.