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以“元帅”、“富士”、“金冠”3个苹果树品种和10、20、40a不同树龄的香梨树利用数理统计方法分析降尘对苹果及香梨叶片重金属含量的影响。结果表明:苹果及香梨叶片铜元素含量达到适宜及过量水平,此时降尘对其含量的影响不显著;苹果叶片锌元素含量不足,此时降尘会降低叶片锌元素的积累;不同树龄香梨叶片锌元素含量适宜或过量,此时降尘对叶片锌元素含量无显著影响;苹果和香梨叶片锰元素含量均缺乏,此时降尘会增加叶片锰元素的积累;苹果和香梨叶片铁元素含量均过量,此时降尘对叶片铁元素含量无显著影响。
The effects of dustfall on the contents of heavy metals in leaves of apple and pear were analyzed by mathematical statistics with 3 apple tree varieties including “Marshal”, “Fuji”, “Golden Delicious” and 10, 20, 40a pear trees of different ages influences. The results showed that the content of copper in apple and pear reached the appropriate and excessive level, and the effect of dusting on the content of copper was not significant. The content of zinc in apple leaves was not enough, and the dust reduced the accumulation of zinc in leaves. The content of Zn in leaves was suitable or excessive, at this time, dustfall had no significant effect on the content of Zn in leaves; the content of Mn in leaves of apple and Xiangli was deficient, and the dust accumulation increased the content of Mn in leaves; At this time, dustfall had no significant effect on iron content in the leaves.