几种主要绿化树种吸滞大气重金属Fe、Zn能力评价

Absorption and Purification Ability of Greening Species to Fe and Zn in the Atmosphere in Qiqihar Region

通过对齐齐哈尔市几种主要城市绿化树种近2年的观测,比较分析了城区内不同环境下绿化树种对重金属Fe、Zn的吸滞作用及特点。结果表明:在对Fe的吸滞中,糖槭是最佳的树种,银中杨次之;银中杨是吸滞Zn能力最强的树种,而糖槭是最差的树种;植株叶片中Fe和Zn的含量之间存在5%显著性负相关,由此可以根据一种元素的含量预测另一种元素的变化趋势。综合对Fe、Zn的吸滞情况,确定在杨树中银中杨是黑龙江省西部地区较适宜的城市园林绿化树种。

Based on the observation of several major urban greening trees in Qiqihar City,the absorption and purification ability and characteristics of greening species under different environment on Fe ＆ Zn were analyzed.Result shows that Acer saccharumis the optimal species to absorb Fe,followed by Populus alba×P.berolinensis.Populus alba×P.berolinensis is the strongest species to absorb Zn,while Acer saccharumis the worst species to absorb Zn.The content of Fe ＆ Zn in the leaves of plant have significant negative correlation（5%）;the change trend of the other element can be predicted according to the content of one element.Based on the comprehensive study of Fe＆ Zn,it is concluded that Populus euphraticais the most suitable urban landscaping tree species in the western part of Heilongjiang Province.