天水苹果园土壤重金属富集状况评价及来源分析

被引:35
作者
陈学民
朱阳春
伏小勇
机构
[1] 兰州交通大学环境与市政工程学院
关键词
天水; 苹果园土壤; 重金属; 来源;
D O I
暂无
中图分类号
X53 [土壤污染及其防治];
学科分类号
083001 [环境科学];
摘要
对天水果园表层(0~20 cm)219件土壤样品进行研究,测定5种重金属(Zn、Cu、Pb、Cr和Cd)及有机质含量,以天水小陇山土壤为对照,运用相关分析和主成分分析方法区分土壤中重金属的来源。结果表明,①Zn、Cu、Pb、Cr和Cd含量分别为77.39、23.03、23.62、61.49 mg.kg-1和0.07 mg.kg-1,其中Cd极显著(P<0.01)高于小陇山土壤,其余4种重金属虽高于小陇山土壤但无显著差异性(P>0.05);②研究区土壤Cu、Pb、Cr三者间在0.01或0.001水平上具有显著正相关性,且这3种重金属与土壤有机质具有显著正相关性,其余重金属间不存在显著相关性;③主成分分析显示Cu、Pb和Cr来源相似,主要来自于成土母质,Cd来源于人为施肥因素,Zn的富集受多种因素影响。研究评价结果显示,天水地区果园土壤Cd受人为施肥影响较大,具有一定程度的富集。
引用
收藏
页码:893 / 898
页数:6
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