摘要
研究广州市城市森林净化大气的功能价值。结果表明:城市森林主要树种抗硫强度为7.740～0.051mg·g-1;单位面积各森林类型的硫净化量为365.278～36.836kg·hm-2a-1;每年净化大气硫的现实值为1.433万t·a-1,折合成SO2为2.865万t·a-1,净化大气SO2潜力5.683万t·a-1;城市森林植物中吸氟能力强的有仪花、银柴和榕树,最差的是柑桔;四旁散生森林类型吸氟能力最大,经济林最差,城市森林每年吸收氟量3078.52t.a-1,折合成氢氟酸为3240.45t·a-1;广州城市森林类型组合成7个绿地类型,各类绿地类型晴天和阴天的平均滞尘率为23.5%～53.5%,全市绿地平均滞尘率为39.93%,城市森林的滞尘总量为6.076万t·a-1;城市森林每年净化大气SO2、氢氟酸和滞尘的功能价值为113796.54万元。
This paper studies on the functional value of urban forest in Guangzhou about its purifying SO2 , hydrofluoric acid and intercepting dust. The result shows that, the anti-sulfur intensity scale of main urban forest is between 7.740 and 0. 051 mg·g^-1 . Different types of tree purification capacity of sulfur is 365. 278 - 36. 836 kg· hm^-2a^-1 , and its total value is 1.433 × 10^4t·a^-1 , which equals to 2.865 × 10^4 t SO2 ·a^-1 And its potential purification capacity of SO2 is 5.683 × 10^4 t·a^-1 ; urban forest can absorb fluorine 3 078.52 t· a^-1, equal to hydro fluoric acid 3 240.45 t· a^-1, among them, Lysidice rhodostegia, Aporosa chinensis and Chinese banyan are good at absorbing fluorine, while Citrus is the worst; the open forest along urban has the biggest capacity of absorbing fluorine（22.551 kg· hm^-2a^- 1 ）, and the economic forest the worst（1.974 kg· hm^-2 a^- 1 ） ; The urban forest in Guangzhou can be classified into 7 types, their average percentage of dust catching capacity is between 23.5% and 53.5% in fine and overcast days, the total average percentage is 39.93% ,and the total amount is 6.076× 10^4 t· a^-1; the filtering SO2 and hydrofluoric acid, and catching dust functional value of the urban forest in Guangzhou City is 113 796.54×10^4 yuan·a^-1 .
出处
《林业科学》
EI
CAS
CSCD
北大核心
2009年第5期42-48,共7页
Scientia Silvae Sinicae
基金
国家科技部平台建设项目(20021220)
广州市林业局科技攻关项目(200306)
关键词
城市森林
净化作用
经济价值
广州市
urban forest
purification function
economic value
Guangzhou
