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选取玉米秸秆、木屑为调理剂,进行强制通风静态堆肥实验,以不添加调理剂为对照,研究调理剂对猪粪堆肥过程中重金属Cu、Zn、Cd活性的影响。结果表明,不添加调理剂的猪粪堆肥过程对重金属Cu、Cd具有一定的钝化效果,但可交换态钝化率分别仅为14.38%,15.43%,对重金属Zn具有一定的活化作用,增加有机肥土地利用过程中的环境风险。与对照相比,玉米秸秆和木屑作为调理剂不同程度地加强Cu、Zn、Cd的钝化效果,且以木屑表现较优的钝化作用,木屑对重金属Cu、Zn、Cd可交换态的钝化率分别达64.16%,56.24%,90.57%。LSD方差分析结果表明,木屑处理对重金属Cu的钝化效果显著优于秸秆处理和对照处理(p<0.05),而秸秆处理和对照处理差异不显著(p>0.05);木屑处理对重金属Zn的钝化效果显著优于秸秆处理和对照处理(p<0.05),秸秆处理显著优于对照处理(p<0.05);木屑处理和秸秆处理对重金属Cd的钝化效果显著优于对照处理(p<0.05),而木屑处理与秸秆处理差异不显著(p>0.05)。
Select corn stalks and sawdust as conditioning agent, static compost ventilation experiment, with no conditioning agent as control, to study the effect of conditioning agent on pig manure composting process of heavy metals Cu, Zn, Cd activity. The results showed that pig manure composting without conditioning agent had some passivation effects on heavy metals Cu and Cd, but the exchangeable passivation rates were only 14.38% and 15.43%, respectively, which had some activation on heavy metal Zn and increased Environmental risk in the process of land use of organic manure. Compared with the control, corn stalks and sawdust were used as conditioning agents to enhance the passivation effect of Cu, Zn and Cd to a certain extent, and the passivation was better with sawdust. The effect of sawdust on the exchangeable state of Cu, Zn and Cd heavy metals The rates were 64.16%, 56.24% and 90.57% respectively. LSD analysis of variance showed that the passivation effect of wood chips on Cu was significantly better than that on straw and CK (p <0.05), but no significant difference between straw and CK (p> 0.05) Passivation effect was significantly better than straw treatment and control treatment (p <0.05), straw treatment was significantly better than the control treatment (p <0.05); wood shavings and straw treatment of heavy metal Cd passivation effect was significantly better than the control treatment (p < 0.05), while there was no significant difference between sawdust treatment and straw treatment (p> 0.05).