新疆阿克苏市13种绿化树种滞尘量特征

Dust-Retention Contents of 13 Urban Greening Tree Species in Aksu,Xinjiang,China

分析了新疆阿克苏市水泥厂(污染区)和柯柯牙城郊防护林区(对照区)的13种绿化树种叶面滞尘量,运用ANOVA单因素方差的LSD比较13种树种叶面滞尘量的差异,结合类平均法(聚类分析),初步筛选出滞尘效果好、抗风沙能力强的适地树种。结果表明:13种绿化树种的叶面滞尘量可以分3类,第1类的滞尘量最高,包括法国梧桐,滞尘量为5.537~7.598g·m-2,可作为污染地区的绿化树种;第2类的滞尘量较高,包括桑树、圆冠榆,分别为3.427~5.174g·m-2、4.671~6.153g·m-2;第3类的滞尘量较低,包括新疆杨、垂柳、大叶白蜡、香梨、沙枣、樱桃、葡萄、杏和石榴等,滞尘量为0.736~3.483g·m-2。污染区树种叶片滞尘量明显高于对照区,差异显著(p【0.05)。

This study investigates the dust contents retained on the leaves of 13 greening tree species in cement works(polluted site)and shelterbelt(control site)in Aksu.The difference of leave dust-retention was determined by One-way ANOVA(LSD multiple comparisons).Average linkage cluster analysis was then applied to select the species with strong dust and wind resistance.The result shows that these 13 greening tree species can be classified into three categories based on the amount of dust-retention.The first category including Platanus orientalis has the highest dust contents from5.537 g·m-2 to 7.598 g·m-2 and it can be as a key greening tree species in polluted areas.The second category including Morus alba and Ulmus densa has relatively high dustretention amount from3.427 g·m-2 to 5.174 g·m-2 and 4.671 g·m-2 to 6.153 g·m-2,respectively.The third category has the least dust-retention and includes Salix babylonica,Fraxinus rhynchophylla,Pyrus sinkiangensis,Elaeagnus angustifolia,Vitis vinifera,Malus pumila,Cerasus pseudocerasus,Arminiaca vulgars,Punica granatum.The dust content was ranged from0.736 to 3.483 g·m-2.The dust-retention contents from the polluted site was obviously higher than that of the control site,differences are significant(p<0.05).