COMPOSITE FERTILIZER WITH MINERAL ELEMENTS AND METHOD FOR PRODUCING THE COMPOSITE FERTILIZER

摘要

A trace element-containing composite fertilizer is provided to be effective for the growth of crops, increase productivity, and prevent a magnesia deficiency when applied to acidic soils or potassium-rich places. A trace element-containing composite fertilizer is prepared by the steps of: providing 70-90wt% of magnesium hydroxide powder and 10-30wt% of trace elements including respective water-soluble salts of zinc, boron, manganese, iron, and copper, amino acid, and seaweeds; firstly, mixing a part of the magnesium hydroxide powder with a part of the trace elements; secondly, mixing the rest of the magnesium hydroxide powder with the rest of the trace elements; and granulating the obtained mixtures, and then drying the granules.