冬季公园绿地消减颗粒物的植物群落结构与空间差异
Plant community structures and spatial differences in reduction of particulate matter in winter park green space
为了研究呼和浩特城市公园不同植物群落结构对6种粒径颗粒物(PM0.3、PM0.5、PM1.0、PM2.5、PM5.0、PM10)的消减,以呼和浩特市赛罕区敕勒川公园为研究区域,选择9种植物群落结构,利用实地测试法,探究冬季各结构对颗粒物的消减差异。结果表明,9种植物群落中6种粒径颗粒物浓度变化趋势为上午和下午高,中午低,呈S型变化;6种粒径颗粒物浓度之间均呈正相关性,其中大、小粒径颗粒物浓度各自之间相关性较强,小粒径与大粒径颗粒物浓度相关性相对较弱;温度、湿度与PM0.3、PM0.5、PM1.0和PM2.5浓度分别呈负相关和正相关(P<0.01),与PM5.0和PM10均无相关性;风速与各种粒径颗粒物浓度均无相关性;各样地对不同粒径颗粒物浓度的平均消减率存在显著差异(P<0.05),针叶混交林和乔灌草结构对PM0.3、PM0.5、PM1.0和PM2.5消减能力较强,各样地对PM5.0和PM10颗粒物消减能力均较弱;各植物群落结构内不同空间位置对颗粒物消减显著差异(P<0.05),且因颗粒物粒径不同消减能力有所差异。
To study the abatement of particulate matters of six particle sizes (PM0.3, PM0.5, PM1.0, PM2.5, PM5.0 and PM10) in Hohhot city parks, nine plant community structures were selected in Chilechuan park, Saihan district, Hohhot city as the study areas, and the differences in the abatement by each structure in winter were investigated using the field test method. The results showed that: the concentrations of the particulate matter of six particle sizes in the nine plant community structures were high in the morning and afternoon and low at noon, with an S-shaped variation trend; there was a positive correlation among the six kinds of particle concentrations, and large-size particles and small-size particles concentrations have a strong correlation respectively, and the correlation between the concentration of small particle size and large particle size was relatively weak; temperature and humidity were negatively and positively correlated with the concentrations of PM0.3, PM0.5, PM1.0 and PM2.5 respectively (P<0.01), and were not correlated with the concentrations of PM5.0 and PM10; there was no correlation between wind speed and the concentration of various particle size particles.The mean abatement rates of the structures for different particle size particulate concentrations were significantly different (P<0.05), the coniferous mixed forest and arbor-shrub-grass structure has a strong ability to reduce PM0.3, PM0.5, PM1.0 and PM2.5 and each plot has a weaker ability to reduce PM5.0 and PM10.There were significant differences in the reduction of particulate matter in different spatial positions within the structure of each plant community (P<0.05), and the reduction ability of particulate matter is different due to different particle diameters.
Hohhot / plant community structure / particulate matter / reducing effect
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国家自然科学基金项目(31860232)
国家自然科学基金项目(32160402)
内蒙古自治区自然科学基金项目(2021LHMS03002)
内蒙古自治区自然科学基金项目(2020LH05004)
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