桑树对大气中二氧化硫和氟化物的抗性及吸收能力研究

摘要

Sulfite and Fluoride content in leaves of Morus alba L. cv. Nongsang 14, Lagerstroemia indica L, L. indica L. f. alba (Nichols.) Rehd., Quercus acutissima Carruth., and Osmanthus fragrans(Thunb.)Lour. var. aurantiacus Makino in the test point of different pollution level were tested. The result showed that fluoride in M. alba cv. Nongsang 14 is significantly high-er than in others; and with the increasing of atmospheric fluoride pollution, more fluoride was fixed. While the absorption of M. alba cv. Nongsang 14 to SO2 is similar to other plants. SEM result shows leaf surface of M. alba cv. Nongsang 14 is rich of deep wrinkles where particles gathered together, indicating strong adsorptivity to pollution such as dust in atmosphere.%对在大气污染程度不同环境里生长的农桑14(Morus alba L. cv. Nongsang 14)、紫薇(Lagerstroemia indica L.)、银薇[Lagerstroemia indica L. f. alba (Nichols.) Rehd.]、栎树(Quercus acutissima Carruth.)、丹桂[Osmanthus fragrans (Thunb.)Lour. var. aurantiacus Makino]5种植物叶片中的亚硫酸盐和氟化物含量进行了测定与分析，发现农桑14对二氧化硫的吸收与其他4种对照植物相比没有明显优势，但对氟化物的吸收能力极显著高于其他4种对照植物，且随着空气中氟化物浓度的升高，吸收量也明显增高。通过电子显微镜扫描观察发现，与其他4种对照植物相比，桑叶表面的皱褶深凹，集聚了较多的颗粒状物，表明农桑14对空气中粉尘等污染物具有较强的吸附能力。