云南13种乡土绿化树种对SO2、NO2气体反应的研究

采用人工模拟熏气的方法,研究了13种云南乡土绿化树种对城市SO2、NO2有害气体的反应.结果表明云南红豆杉、长梗润楠、翠柏、滇润楠、麻栗坡含笑、南亚含笑、山玉兰对SO2气体的抗性弱,而云南含笑、脉叶虎皮楠、川滇三角枫对SO2气体的抗性最强,灯台树、川滇三角枫净化SO2的能力较强,其净化量分别为300mg·kg-1、700 mg·kg-1.NO2浓度为1.0 mg·m-3时,长梗润楠、云南含笑、云南拟单性木兰、云南红豆杉、麻栗坡含笑、灯台树叶片的N净化量依次为2 000 mg·kg-1、1 100 mg·kg-1、1 700 mg·kg-1、2 300 mg·kg-1、1 200 mg·kg-1、13 100 mg·kg-1.经综合比较川滇三角枫对SO2气体具有较好的抗性和净化能力,而对NO2气体具有较好的抗性;云南含笑、云南拟单性木兰、脉叶虎皮楠等树种对SO2、NO2气体具有较好的抗性和净化能力.

Study on the Reaction of 13 Indigenous Tree species for Greening in Yunnan to SO2 and NO2

Adopting the artificial simulation method,the reactions of 13 tree species for greening indigenous to Yunnan were studied.The results showed that the resistance of Taxus yunnanensis,Machilus longipedicellata,Calocedrus macrolepis,Machilus yunnanensis,Michelia chartacea,Michelia doltsopaand Magnolia delavayi to SO_(2) was not significant.The resistance of Michelia yunnanensis,Daphniphyllum paxianum and Acer paxii was significant.The purification ability of Cornus controrersa and Acer paxii to SO_(2) was promising,with the purify ability of 300 mg/kg and 700 mg/kg respectively.Under the NO_(2)concentration of 1.0 mg/m~(3),the purification amount of leaves of Machilus longipedicellata,Michelia yunnanensis,Parakmeria yunnanensis,Taxus yunnanensis,Michelia chartacea and Cornus controrersa were 2 000 mg/kg,1 100 mg/kg,1 700 mg/kg,2 300 mg/kg,1 200 mg/kg and 13 100 mg/kg respectively.The integrated comparison and evaluation results indicated that Acer paxii had significant resistance and purification ability to SO_(2),and had significant resistance to NO_(2).Michelia yunnanensis,Parakmeria yunnanensis and Daphniphyllum paxianum had significant resistance and purification ability to SO_(2) and NO_(2).