不同钝化剂对猪粪堆肥中重金属的钝化效果研究

Passivation Effect of Different Passivating Agents on Heavy Metals in Composting of Pig Manure

采用添加了沸石、钙镁磷肥和煤灰3种物质作为钝化剂的猪粪堆肥栽培小白菜,测定小白菜的重金属含量、产量及全N、全P、全K的含量。结果显示,添加钝化剂能显著降低堆肥中可被吸收的重金属含量,其中以添加2.5%沸石+2.5%粉煤灰处理的钝化效果最佳;钝化剂对小白菜的产量及全N、全P、全K含量的影响不显著。

The composted pig manure,which was added with passivating agents（zeolite,fused calcium magnesium phosphate fertilizer and coal ash）,were used to culture cabbage,and then the contents of heavy metals,yield and the contents of total N,total P and total K of cabbage were determined.The results showed that adding passivating agents can significantly reduce the content of absorbable heavy metals in composted pig manure,in which the treatment added with 2.5% zeolite ＋2.5% coal ash had the best passivation effect;adding passivating agents had non-significant impacts on yield and contents of total N,total P and total P of cabbage.