西北林学院学报2024，Vol.39Issue(3)：257-265,9.DOI:10.3969/j.issn.1001-7461.2024.03.32
郑州市常绿灌木滞留颗粒物能力及季节差异
Particles Retention Capacity and Seasonal Variation of Evergreen Shrubs in Zhengzhou
摘要
Abstract
The objective of this study was to explore the particle retention capacity and seasonal variations of evergreen broad-leaved shrubs under long-term pollution in Zhengzhou.Twelve common evergreen broad-leaved shrubs were selected to quantified particles of different sizes(TSP,PM＞10,PM10,PM2.5)per unit leaf area using 3-layer membrane filtration method.To explore the influence of leaf surface micromorpholo-gy on dust-retention capability,grain size and seasonal differences,the leaf surface micromorphology of the 12 shrubs was observed by ultra-depth three-dimensional microscope and scanning electron microscopy(SEM).Our results showed that 1)there were significant differences in dust retention capacity among the 12 shrubs(P＜0.05).The shrubs with the strongest dust-retention ability were Pyracantha fortuneana and Nerium indicum,while the weakest ones were Aucuba japonica and Nandina domestica.The particles retained in the leaves were mainly PM＞10,followed by PM2.5,and the smallest proportion of the ratio of PM2.5-10 mass per unit leaf area to total dust content ranged from 2.52％to 15.36％.2)All 12 shrubs dis-played significant differences in dust grain size and retention amount between the seasons.However,the mass proportion for PM＞10,PM2.5 and PM2.5-10 was the highest in winter and spring,summer,spring,re-spectively.3)Micromorphological observations of the leaf surfaces showed that the tip and tail of the leaf were the important parts of trapping particulate matter,and the micro-morphological structures such as grooves,bulges,villi and the clustered structures enhanced the dust retention capability of plants.At the same time,we found that the leaf surface of some plants had hyphae by scanning electron microscopy(SEM).The correlation analysis indicated that the more the wax content,the more hyphae,the stronger the dust retention capability.The screening of dust retention tree species should be comprehensively con-sidered many factors,such as dust retention amount,particle size and seasonal replacement.In conclusion,P.fortuneana and N.indicum have strong dust retention capability for particles of various sizes,so they can be used as the first choice for the construction of garden city in Zhengzhou aiming at improving air quality.关键词
常绿阔叶灌木/滞留能力/粒度/季节差异/叶表微形态Key words
evergreen broad-leaved shrub/retention capability/grain size/seasonal difference/leaf surface micromorphology分类
农业科技引用本文复制引用
贺丹,王翼飞,原江琴,李朝梅,王晨旭,雷雅凯,刘艺平,李永华..郑州市常绿灌木滞留颗粒物能力及季节差异[J].西北林学院学报,2024,39(3):257-265,9.基金项目
国家自然科学基金(31600579) （31600579）
河南省科技攻关项目(212102110185) （212102110185）
河南省青年骨干教师资助项目(2020GGJS049) （2020GGJS049）
河南农业大学大学生创新训练计划(2022DC034). （2022DC034）
