【摘要】 以不同pH值的溶液模拟酸雨对6种南方城市常用的绿化植物进行处理,来研究酸雨对植物叶面积、单叶质量、根冠比等形态学效应的影响。结果表明,6个树种的3个形态学指标都受到一定的影响。①pH为5.0,4.0和3.0的模拟酸雨降低了广玉兰Magnoliagrandiflora,樟树Cinnamomum camphora,桂花Osmanthus fragrans的叶面积。②pH为5.0,4.0和3.0的模拟酸雨降低了广玉兰、樟树、桂花的单叶质量,使杜鹃Rhododendron simsii叶片的单叶质量增加。③模拟酸雨促进樟树、红花木Loropetatum chinensevar.rubrum地下部分的生长,使二者的根冠比增大;与此相反,皋月杜鹃Rhododendron indicum的根冠比在模拟酸雨的作用下减小。④从植物形态学角度上看,广玉兰和桂花2个树种不适于在自然降水pH≤4的环境中生存,皋月杜鹃不适于在自然降水pH≤3的区域生存。图1表2参13更多还原

【Abstract】 The morphological effects of acid rain on the leaf area,the weight per leaf,and the root/crown of plants were studied by using different pH solutions to simulate acid rain and treating 6 species of common green plants in the southern cities.Results showed that all of the 3 morphological indexes of 6 species of trees had been affected to some extent.(1)The simulated acid rain of pH 5.0,4.0 and 3.0 reduced the leaf area of Magnolia grandiflora,Cinnamomum camphora and Osmanthus fragrans;(2)The simulated acid rain of pH 5.0,4.0 and 3.0 reduced the weight per leaf of Magnolia grandiflora,Cinnamomum camphora and Osmanthus fragrans,but increased the weight per leaf of Rhododendron simsii ;(3)Simulated acid rain promoted the growth of the underground parts of Cinnamomum camphora and Loropetalum chinense var.rubrum,and increased their roots/crowns;the simulated acid rain reduced the roots/crowns of Rhododendron indicum;(4)Seen from the perspective of phytomorphology,Magnolia grandiflora and Osmanthus fragrans were not suitable for growing in an environment with natural rainfall pH≤4,and Rhododendron indicum was not suitable for growing in an environment with natural rainfall pH≤3.更多还原