2013年冬季海口林场常绿植物冻害调查分析

针对2013年冬季昆明遭遇了低温雨雪天气的影响，对昆明市海口林场露天苗圃地栽培的常绿植物冻害进行了调查。结果显示：所调查的43种植物中，16种植物有不同程度的受冻，占37．2％；冻害级别3级以上有8种，分别是缅桂、清香木、小叶女贞、尖叶木樨榄、小叶榕、马蹄荷、三角梅、鹅掌柴，占18．6％；部分树种幼树和成年大树冻害程度一样，部分树种随着年龄增加，冻害程度降低。根据这次冻害的发生情况，提出了在今后苗木生产过程中，要针对性地对易受冻害的苗木进行保护管理，推广应用抗冻能力强的植物，改良抗冻能力，加大应用乡土绿化植物的力度。

Investigation of Freezing Damage on Evergreen Plants in Haikou Forest Farm in the Winter of 2013

This article investigates the freezing damages suffered from cold weather in the winter of 2013 on the evergreen plants of open nursery cultivation at Haikou Forest Farm in Kunming City. The results show that among 43 species of plants in the investigation, 16 species have suffered different degrees of freezing damage, accounting for 37.2 %;8 species＇s damage are above grade III of freezing damage, which respectively is M. alha, P. weinmannifolia, L. quihoui, S. cuspidata, F. concinna, E. populnea, B. spectabilis, S. octophylla, accounting for 18.6% ; For some species of saplings suffer same freezing damages with adult trees, and other species＇ freezing damges decrease with age increasing. According to the occurrence situation of the freezing damage, this article puts forward that in the future production process of seedlings, the farm should take targeted measures to protect the seedlings which are susceptible to freezing damage, popularize and apply the speacies with strong resistance to freezing, improve freezing damage resistance ability of the plants,and increase the application of native plants.