摘要
对杭州市8种类型森林绿地空气负离子及气候因子水平进行研究,结果表明:城郊林地与城区各种类型森林绿地相比,其负离子浓度较高约1020～1230个/cm3,比城区绿地高出约1.7倍;城区绿地中空气负离子浓度从大到小排序为:植物园>城中公园>街心公园>道路>街头绿地>居住小区;在森林植物旺盛生长期间,空气负离子水平呈增加趋势;由林缘向林内观测表明,绿地空气负离子浓度也呈增加趋势;以高大乔木为主的近自然林,空气负离子浓度高,生态效应明显,而灌草绿地生态效应相对较弱;森林绿地空气负离子浓度与相对湿度呈显著正相关关系,与生境风速、噪音、粉尘含量、光照强度及空气温度呈显著负相关关系。
It was showed by the study on aero-anion concentration and climatic factor level in the 8 types of urban forest green space in Hangzhou city that the aero-anion concentration in suburban forest green space was 1020 1230 Ions. cm^3,and more than 1.7 times than that in any types of forest green space in inner city. The sequence of aero-anion concentration in inner city＇s forest green space was arboretum park 〉 central park 〉 street garden 〉 boulevard 〉 public green space 〉 residential green space. The aero-anion concentrauon was mcreasing gradually during the rapid growth period of forests, and as well in place direction from the edge of the forests to the plots of internal forest green space. There were the high concentration of aero- anion and significant ecological efficacy in the close-to nature forest consisted of a large number of woods compared with those in the bush and grass green space. The concentration of aero-anion in forest green space was significant by positive relation to the atmosphere humidity, while it was significant by negative relation to the windy speed, noisy intensity, dust content, light intensity and environmental temperature.
出处
《中国城市林业》
2008年第4期49-51,57,共4页
Journal of Chinese Urban Forestry
基金
浙江省杭州市林业水利局重点资助项目
