施用猪粪有机肥对土壤环境质量的影响

发布时间：2019-05-24 17:28

【摘要】：为研究畜禽粪便有机肥的施用对土壤造成的潜在重金属污染,采用大田模拟试验,研究了3种猪粪有机肥对土壤有机质含量、p H值、重金属含量的影响。结果表明:施用有机肥T11[下标数字分别表示有机肥种类(1、2、3)和施用量(1表示1 875 kg/hm2,2表示3 750 kg/hm2),下同]、T12、T22、T31、T32处理较对照(施用普通复合肥)土壤有机质含量均有不同程度的增加,增幅为5.34%~13.50%。且增量施用有机肥,土壤有机质含量会随之增加,但T21处理土壤有机质较对照下降19.36%。与对照相比,各处理p H值没有较为一致的变化规律。除铅(Pb)外,施用有机肥处理浅层(0~40 cm)重金属含量较对照均有不同程度的增加,其中汞(Hg)、砷(As)在0~10 cm层增幅分别为0~232.70%、15.79%~238.35%,Pb、铜(Cu)、锌(Zn)在0~20 cm层增幅分别为6.27%~32.41%、10.14%~34.39%、12.95%~45.85%,铬(Cr)在0~40 cm层增幅为14.03%~26.82%;深层土壤重金属含量较对照显著减小,Pb在90~100 cm降幅为56.37%~71.01%,Zn在60~70 cm、90~100 cm层降幅分别为10.51%~36.24%、27.71%~49.36%,镉(Cd)在70~90 cm层降幅为29.36%~46.63%。多因素方差分析表明,Cr、Pb、Hg、As含量与有机肥施用量的关系极显著,Cu、Zn、Cd不显著;Cr、As、Zn含量与有机肥种类的关系极显著,Pb、Hg、Cu、Cd不显著。综合分析表明,施用3种有机肥对土壤特别是表层土壤有较强的潜在重金属污染风险。
[Abstract]:In order to study the potential heavy metal pollution caused by the application of organic fertilizer in livestock and poultry manure, the effects of three kinds of organic fertilizer on soil organic matter content, pH value and heavy metal content were studied by field simulation experiment. The results showed that the application of organic fertilizer T11 [subscript figures denote the type of organic fertilizer (1, 2, 3) and the amount of application (1 = 1 875 kg/hm2,2 for 3 750 kg/hm2), T12, T22, T31, respectively], T12, T22, T31, T12, T22, T31, respectively. Compared with the control (application of common compound fertilizer), the content of soil organic matter in T32 treatment increased by 5.34% and 13.50%, respectively. The content of soil organic matter increased with the incremental application of organic fertilizer, but the content of soil organic matter in T21 treatment decreased by 19.36% compared with the control. Compared with the control, there was no consistent change in pH value of each treatment. Except lead (Pb), the content of heavy metals in shallow layer (0 鈮，

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