持续高温天气对城市绿化树木的影响

通过2013年夏季持续高温天气对南京河西地区城市绿化树木影响的观测,分析持续高温对树木的危害影响,对部分绿化树木耐热性进行评价.发现水杉、银杏、乐昌含笑、金叶女贞、毛鹃耐高温能力较差,雪松、垂柳、悬铃木、紫叶李、紫薇、红叶石楠、构骨、火棘耐高温能力较强.其中：水杉总受害率最高,耐高温性最差;垂柳总受害率最低,耐高温性最强,并针对高温危害提出缓解灾害发生及蔓延的相关技术措施.研究结果可为城市绿化树种选择、配置及养护提供科学依据.

Influence of consecutive high temperature to the urban greening trees

By monitoring the influence of consecutive hot weather to the urban greening trees which planted in West area of Qinhuai River of Nanjing in 2013, and analyzing the adverse effects, we assessed part of these trees＇ heat resistance. We found that Metasequoia glyptostroboides , Ginkgo biloba ,Michelia chapensis , Ligustrum x vicary ,Rhododendron simsii had low heat-resisting index. Cedrus deodara, Salix babylonic,Platanus sp. ,Prunus cerasifera f. atropurpurea, Lagerstroemia indiaca, Photinia × fraseri, llex cornuta, and Pyracantha fortuneana had high heat-resisting index. Overall, Metasequoia glyp- tostroboides had the highest total damage rate and lowest heat-resisting index. Salix babylonic had the lowest total damage rate and the highest heat-resisting index. We also advanced relevant technical methods to prevent the disaster spreading. The result in this research can support a scientific basis on choosing, deploying and curing the urban greening trees.