| 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 K2SO4 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. |
