【摘要】：為研究畜禽糞便有機肥的施用對土壤造成的潛在重金屬污染,采用大田模擬試驗,研究了3種豬糞有機肥對土壤有機質(zhì)含量、p H值、重金屬含量的影響。結(jié)果表明:施用有機肥T11[下標(biāo)數(shù)字分別表示有機肥種類(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處理較對照(施用普通復(fù)合肥)土壤有機質(zhì)含量均有不同程度的增加,增幅為5.34%~13.50%。且增量施用有機肥,土壤有機質(zhì)含量會隨之增加,但T21處理土壤有機質(zhì)較對照下降19.36%。與對照相比,各處理p H值沒有較為一致的變化規(guī)律。除鉛(Pb)外,施用有機肥處理淺層(0~40 cm)重金屬含量較對照均有不同程度的增加,其中汞(Hg)、砷(As)在0~10 cm層增幅分別為0~232.70%、15.79%~238.35%,Pb、銅(Cu)、鋅(Zn)在0~20 cm層增幅分別為6.27%~32.41%、10.14%~34.39%、12.95%~45.85%,鉻(Cr)在0~40 cm層增幅為14.03%~26.82%;深層土壤重金屬含量較對照顯著減小,Pb在90~100 cm降幅為56.37%~71.01%,Zn在60~70 cm、90~100 cm層降幅分別為10.51%~36.24%、27.71%~49.36%,鎘(Cd)在70~90 cm層降幅為29.36%~46.63%。多因素方差分析表明,Cr、Pb、Hg、As含量與有機肥施用量的關(guān)系極顯著,Cu、Zn、Cd不顯著;Cr、As、Zn含量與有機肥種類的關(guān)系極顯著,Pb、Hg、Cu、Cd不顯著。綜合分析表明,施用3種有機肥對土壤特別是表層土壤有較強的潛在重金屬污染風(fēng)險。
[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，

本文編號：2485045