Edited by Manfred LK PA-7a on 19/12/2017, 15:37:07
Man darf allerdings nicht vergessen, dass Peking auf dem 39. Breitengrad liegt, das ist etwas südlich von Neapel!
Studies on Creating Cold Resistant Trachycarpus fortunei in Beijing
Chen, R.; Chen, J.
College of Landscape Architecture, P.O. Box 123, Beijing Forestry University, 100083, Beijing, China
Trachycarpus fortunei is not only an important plant material in forestry and urban Landscape, but also one of the most cold hardy species in Trachycarpus genus. It could resist -7.1 °C in the open in Sichuan Province. The distribution of T. fortunei is mainly along Qinling, to Yangzi River area. There was no record for cultivation of this species in Beijing before 1979. The seedlings in Beijing were from the seeds in Xi’an and sowed in 1980. They could resist -17.8 °C for a short period. In January 2009, the lowest temperature had reached -16 °C. The temperature is almost the lowest in the past 40 years in Beijing in December. The 30-year-old Trachycarpus only have freezing injury on old leaves. Electrical conductivity test of different T. fortunei for different regions was conducted. The result showed that the leave of T. fortunei in Beijing is more cold resistant than the same species in Kunming, Yunnan Province. The T. fortunei tree bore fruits every year after 2005. Over 8622 seeds were obtained in December 2009. The result showed that it was a successful way to create the cold hardy T. fortunei for acclimatization. Acknowledgement: Supported by National Natural Science Foundation of China. Grant No. 30872060
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