Abstract: A long lasting weather of massive ice storm at the beginning of 2008 caused a large scale disaster to plants of forests in south China.A survey was carried out to evaluate harm of precious trees including Pterocarpus macrocarpus storthy after the disaster.The results showed that seedlings of Pterocarpus macrocarpus at the age of 1 or 2 a were inferior to those of Dalbergia and Santalum in cold tolerance.Pterocarpus macrocarpus seedlings were apparently harmed at 2.5℃,which was a critical temperature for the survival of the species and also a limiting factor to introduce the species to this region.Santalum album could tolerate a temperature as low as-1℃.Dalbergia odorifera could survive at-3℃ and Aquilaria sinensis could survive frosts for a short time of frosting.In addition,the seedlings with high quality and older age showed higher cold tolerance.

Key words: Pterocarpus macrocarpus, Dalbergia odorifera, Santalum album, Aquilaria sinensis, precious trees, cold tolerance