Abstract:

To explore the cold resistance ability of roof greening woody plants and screen out the more cold resistance plants, the 1-year-old dormant shoots cell membrane permeability of 12 kinds woody plants were determined by conductivity combined with the roof surface temperature, wind, relative humidity observed on roof and ground under natural cooling conditions in winter in December, 2010, January and February, 2011. The results showed that the roof had higher temperature, greater speed wind and lower humidity than the grand in winter in Shijiazhuang. The cold resistance of Broussonetia papyrifera, Salix matsudana, Lonicera maackii were best, and which of Ulmus pumila ‘jinye’, Morus alba, Periploca sepium, Ulmus pumila Populus simonii and Ligustrum cv. ‘Vicaryi’ were better, and the cold resistance of Sorbaria sorbifolia, Kerria japonica and Swida alba were worst. It was feasible for using conductivity to evaluate the cold resistance of roof greening woody plants, and which can provide a reference for screening better cold resistance woody plants.