城市绿地空间结构对空气负离子的影响与评价

摘要

Urban green space is an important regulator of changing the aeroanion concentration ,and provides an im-portant place for human activities and recreation .Urban green space with representative & spatial heterogeneity in Conghua Region of Guangzhou City were selected to be research objects ;aeroanion levels of six types of green space in summer and winter were monitored continuously .Result shows that :aeroanion concentration of green vegetation are significantly different ;stratified green with complex structure & rich species are higher than that with simple structure & less species ;in summer and winter ,the highest concentration of aeroanion in different parts of the two regions are the villas & public service area ,the lowest two areas are district roads & green of square ;air cleanliness index is overall optimal ,except for the summer district roads (Grade B) & green square (Grade D);other regions are all Class A ,the quality of green square in winter has improved ,being Grade B ,while the others are all Grade A .%城市绿地是空气负离子浓度变化的重要调节器，并为人类活动和游憩提供重要场所。选择广州市从化区具有代表性、空间结构异质性的城市绿地作为研究对象，在冬夏2个季节对6种绿地类型的空气负离子水平进行连续监测。结果表明：不同植被类型绿地空气负离子浓度差异显著，结构复杂、物种丰富的复层绿地高于结构简单、物种少的绿地；夏季和冬季不同地区负离子浓度最高的两个地区均为别墅区和公共服务区，最低的2个地区为小区道路和广场绿地；空气清洁度指标总体较好，夏季除小区道路（B级）和广场绿地（D级）外，其他地区均为 A级，冬季广场绿地质量有所改善为B级，而其他均为A级。