造纸厂污泥用于矿山废弃地土壤改良的试验研究

Experimental Study on the Application of Paper Mill Sludge to Soil Improvement of Mine Abandoned Land

试验将造纸厂污泥施用于矿山废弃地,研究其对矿山废弃地玉米产量及土壤理化性状的影响。通过测定土壤及玉米籽粒中重金属等有害物质的含量来对污泥应用的安全性进行评价。结果表明:污泥的施用可促进玉米产量的形成,并且与施用量呈正相关,其中XCL3处理的效果最好;污泥还可以显著改善矿山废弃地土壤理化性状,平衡土壤酸碱度,调节水溶性盐含量及阳离子交换量,增加有机质、氮、磷、钾含量;施用污泥后土壤及玉米籽粒中重金属均符合国家标准,不会对土壤环境造成危害,也不会通过食物链进入人体。

Paper mill sludge was applied to mine abandoned land in an experiment to study its effects on maize yield and soil physical and chemical properties.The safety of sludge application was evaluated by measuring the content of heavy metals and other harmful substances in soil and maize kernel.The results showed that:The application of sludge could promote the formation of maize yield,and was positively correlated with the application amount,among which XCL3 treatment had the best effect;Sludge can also significantly improve soil physical and chemical properties,balance soil pH,adjust water-soluble salt content and cation exchange capacity,and increase the content of organic matter,nitrogen,phosphorus and potassium;Heavy metals in soil and corn seeds after sludge application meet national standards,will not cause harm to the soil environment,and will not enter the human body through the food chain.