利用污泥作为广东赤红壤种植作物肥源的方法研究

Research methods of sludge as Guangdong latosolic red soils crop fertilizer

污泥是城市污水处理的产物,农业利用是较好的污泥处理方式。通过盆栽试验和动态渗滤试验,探讨污泥作为广东赤红壤种植作物肥源的方法。盆栽试验和动态渗滤试验得出了一致结论:污泥和K2SO4混合处理不仅肥效好,作物产量高,并且作物体内重金属含量较低,降低了污泥直接农用的次生重金属污染。试验利用污泥农用作为广东赤红壤种植作物肥源,在充分发挥肥效作用的同时,又尽量避免了污泥直接农用带来的环境风险。

Sludge is the production of city sewage treatment, agricultural use of sludge treatment is better. Through pot experiment and dynamic leaching test, the method of sludge as Guangdong lateritic red soil crop fertilizer was studied. The pot experiment and dynamic leaching test results showed that the mixture treatment of the sludge and K2S04 had good effect, high crop yields, and the heavy metal content of crops was low, which reduced the secondary heavy metal pollution of the direct agricultural sludge. Sludge as Guangdong lateritic red soil crop fertilizer could get the highest fertilizer-use efficiency, and avoid the environmental risk caused by direct agricultural sludge.