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为探索黑龙江省典型大棚土壤中重金属Cu、Zn、Cd的污染状况,采用单因子与限值比较、综合因子指数法和相关系数法对污染情况进行综合评价。结果表明:除肇东2a、肇东6a棚龄无污染外,其他大棚均有不同程度的污染;五常8a、肇东11a棚龄属轻度污染,其他棚龄均达中污染程度,而且五常大棚综合污染程度较肇东严重。Cu、Zn、Cd与棚龄之间的相关系数显示,各元素与棚龄之间存在着相关关系。五常大棚Cu、Zn、Cd与棚龄呈显著相关(P<0.05),相关程度Cu>Cd>Zn;肇东大棚Cu、Zn、Cd与棚龄之间达极显著相关(P<0.01)。
In order to explore the pollution of heavy metals Cu, Zn and Cd in soils of typical greenhouse in Heilongjiang Province, the single factor and limit values were compared, and the comprehensive factor index method and correlation coefficient method were used to evaluate the pollution status. The results showed that all the greenhouses except for Zhaodong 2a and Zhaodong 6a were polluted in different degrees. The pollutions of Wutang 8a and Zhaodong 11a belonged to light pollution, and the polluted degree of other green belts were reached, Greenhouse comprehensive pollution than Zhaodong serious. Correlation coefficients between Cu, Zn, Cd and shelf-life show that there is a correlation between each element and shelf-life. There was a significant correlation between Cu, Zn and Cd in the greenhouse and the stand age (P <0.05) and the correlation degree Cu> Cd> Zn.