园林绿化植物对大气二氧化硫和氟化物污染的净化能力及修复功能

Decontamination Ability of Garden Plants to Absorb Sulfur Dioxide and Fluoride

摘要:

研究32种盆栽于佛山市污染区的城市园林绿化植物对大气二氧化硫(SO₂)和氟化物的净化能力及其对大气污染的修复功能。结果显示,竹节树、傅园榕等14种植物对SO₂、氟化物等污染气体不但具有较强的抗性,而且具有较高的吸收净化能力,叶片平均含硫量达17 442 (11 754-27 658 mg kg^-1DW),是清洁区(5 988 mg kg^-1DW)的2.9倍；平均含氟量达3 725.9(1 954.9-5 331.7 mg kg^-1DW),是清洁区(170.3mgkg-1DW)的21倍。表明这些植物对大气SO₂、HF复合污染具有很好的净化能力和修复功能,是值得推广的城市园林绿化树种。

Abstract:

Seventy-five species of garden plant seedlings were potted under contaminated environment at Dongcun (DC) and Wuxing (WX) near ceramic industry sites in Foshan City, Guangdong, and at botanical garden (control). The contents of sulphur and fluorine in the leaves of the thirty-two surviving species were measured after 128 days, among which 14 species including Ficus religiosa, F. microcarpa var. fuyuensis, Lysidice rhodostegia, Carallia brachiata, Ilex rotunda, etc. had great ability to absorb air pollutants SO₂ and fluoride. Average sulphur and fluorine contents in leaves of these species pot-grown at contaminated sites were 17442 mg kg^-1 DW and 3725.9 mg kg^-1 DW, respectively, which were 1.9 times and 20 times higher than those at control site, respectively, showing that these species were more tolerant to SO₂ and fluoride pollutants.