西宁市城市绿化常见灌木和绿篱树种滞尘功能的研究

Study on Dust Retaining Function of Common Shrubs andHedgerow Tree Species in Xining City

选择西宁市12种常见绿化灌木和绿篱树种,分析在敞开和封闭两种环境下其滞尘量、滞尘力的大小和变化,研究各树种与滞尘环境、滞尘天数、叶面类型的关系。结果表明,研究的12个树种敞开环境中滞尘量和滞尘力均高于封闭环境,敞开环境平均滞尘力是封闭环境的1.8倍,各树种平均滞尘能力在雨后一周左右达到顶峰,叶面粗糙和被毛两种形态对滞尘能力有促进作用,沙棘、红刺玫、榆叶梅、金叶莸、黄刺玫在研究的树种里滞尘力较强,在城市园林绿化中可以优先考虑作为绿篱树种。

Selecting 12 common green shrubs and hedgerows in Xining city and analyzing size and change of dust retention number and dust retention ability under open and closed environments to study the relationship between different tree species and dust retention environment,dust retention days and leaf surface type.The result showed that dust retention number and dust retention ability in the open environment of 12 tree species were higher than that in the closed environment,and the average dust retention ability in the open environment was 1.8 times higher than that in the closed environment.The average dust retention ability of each tree species peaked about a week after the rain,two forms of leaf roughness and coat could promote dust retention ability.The dust retention ability of Hippophae rhamnoides Linn,Rosa rugosa,Amygdalus triloba,Caryopteris clandonensis,Rosa xanthina Lindl were stronger in the studied species and could be considered as hedgerows in preference in urban landscape greening.