Abstract:

Screening woody plants to adapt to the roof special circumstances has important practical significance for riching the kinds of the greening plants and making it play the functions of roof greening and beautification. The high tempreture is the limited factor for plant growing. In order to expore the heat resistance of roof greening plants and study the adaptability of the plant to high temperature environments, Ulmus pumila L, Salix matsudana Koidz, Broussonetia papyrifera, Periploca sepium Bung., Populus simonii Carr., Lonicera maackii (Rupr.) Maxim. planted on the roof and Ulmus pumila cv. jinye, Sorbaria kirilowii (Reqel) Maxim. suitable for roof greening were as the test materials in the experiment. The relative conductivity of leaves of above plants were tested at different heat treatment conditions, and with Forstst 2.1 the heat resistance of the eight kinds of woody plants were studied. The results showed that: the temperature and cell injury rate of leaves treated with different high temperature were ‘S’ shaped curve. The semi-lethal temperature of different plants from high to low was Periploca sepium Bung., Periploca sepium Bung., Populus simonii Carr., Salix matsudana Koidz., Ulmus pumila L., Sorbaria kirilowii (Reqel) Maxim., Broussonetia papyrifera, Ulmus pumila cv. jinye, and which were 65.30℃, 63.80℃, 57.85℃, 56.84℃, 55.87℃, 49.94℃, 44.81℃, 43.98℃ respectively. The heat resistance of Periploca sepium Bung. and Lonicera maackii (Rupr.) Maxim. was best, that of Salix matsudana Koidz., Ulmus pumila L., Populus simonii Carr. was better, and that of Sorbaria kirilowii (Reqel) Maxim., Broussonetia papyrifera and Ulmus pumila cv. jinye were worst.