NOVEL ORGANIC FERTILIZER FOR CONTROLLING POLLUTION OR ACCUMULATION OF HEAVY METAL CADMIUM IN RICE, AND PREPARATION METHOD AND APPLICATION METHOD THEREFOR

摘要

A novel organic fertilizer for controlling the pollution or accumulation of heavy metal cadmium in rice, a preparation method and an application method therefor, which relate to the technical field of fertilizers. Using a baseline of 100 kg of organic material that has a water content of 15%, a fertilizer is added having 0.05 to 5 kg of an iron salt for iron, and manganese salt, zinc salt and copper salt are added according to the mass ratio of iron salt for iron: manganese salt for manganese: zinc salt for zinc: copper salt for copper being 1:0.2 to 8:0.08 to 2:0.001 to 0.5. The organic fertilizer is developed on the basis of the chemical process of heavy metal cadmium in rice paddy field soil, the absorption process of rice roots and the transfer process of plant cadmium. The fertilizer is convenient to apply, low in usage amount, low in price, and low in costs, is generally applicable to farmland that has heavy, medium and light cadmium pollution in China, and has wide adaptability.