摘要
1991～1993年在河北省承德市5个大气监测点测定8种常见绿化树种树皮pH值的变化，结果表明8种树皮pH值为3．5～7．0，平均值为5．7±0．6。不同功能区树皮pH从大到小依次为：公园区＞工业区＞生活居住区（P＜0．05），与大气SO2等酸性气体的污染有关。同种植物的树皮浸提液SO2-4含量相对清洁区为2．516mg／g，污染区为5．342mg／g（P＜0．001），两者之间的相关公式为Y＝2．576＋6．4736X（r＝0.7730，P＜0．001）。树皮pH与SO2-4呈极显著负相关，相关公式为Y＝7．1－0．3865X（r＝－0．8941，P＜0．001）。榆树等4种落叶阔叶树树皮对大气SO2的变化较敏感，可作为SO2等酸性气体的适宜指示与监测植物。
The pH values of the barks of 8 tree species changed from 3. 5 to 7. 0, with average value being 5. 7 ± 0. 6, and were lower than that of naturaly growing trees. Different urban funtional areas bore the different tree bark pH, with a series of garden area > industrial area > heavily traffic area > domestic area (P< 0. 05 ), which was owing to the pollution of SO2 and other acid gases in different concentration in these areas. The SO2-4 concentration of extractable bark solution of the same tree varied with the degree of SO2 pollution, changing from 2. 516 mg/g in relative clean site to 5. 342 mg/g in polluted site. The relation between bark SO2-4 and air SO2 was Y = 2. 576 + 6. 4736X (r =0. 7730, P <0.001 ). Meanwhile, tree barks showed negative line relation between bark pH and SO2-4, with Y=7.1 - 0. 3865X (r= - 0. 8941, P<0.001 ). The results showed that the barks of four deciduous species such as Ulmus pumila L., Populus canadensis Moench, Salix babyonica L., Sophora japonica L. were sensitive to air SO2 and could be used as the suitable indicator plant.
出处
《植物资源与环境》
CSCD
1996年第2期28-33,共6页
Journal of Plant Resources and Environment
