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METHOD FOR PREPARING SPECIAL SLOW-RELEASE LONG-ACTING COMPOUND FERTILIZER FOR PADDY RICE
METHOD FOR PREPARING SPECIAL SLOW-RELEASE LONG-ACTING COMPOUND FERTILIZER FOR PADDY RICE
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机译：稻米专用缓释长效复合肥的制备方法
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摘要
The present invention provides a method for preparing a special slow-release long-acting compound fertilizer for paddy rice. The compound fertilizer is a mixture of a plurality of fertilizers and ingredients with no special fertilizer effect. The compound fertilizer is prepared with the following raw materials in parts by mass: 25 to 45 parts of urea, 8 to 25 parts of ammonium chloride, 20 to 35 parts of potassium chloride, 20 to 35 parts of a mixed phosphate fertilizer, 7 to 11 parts of a granulation additive, and a proper amount of water. The preparation method comprises the following steps: (1) preparing compounds of a potash fertilizer and a nitrogen fertilizer; (2) preparing a mixed phosphate fertilizer; (3) preparing mixed particles of each ingredient of the compound fertilizer; (4) coating with a stearic acid; (5) spreading powder of a modified zeolite powder material; and (6) screening, metering, quality inspection, and packaging of a qualified product. Therefore, the present invention provides a method for preparing a special slow-release long-acting compound fertilizer for paddy rice, which is comprehensive in nutrition and excellent in slow-release performance, can fully satisfy demands for nutrients by paddy rice, makes full use of the fertilizer effectiveness, improves both yield and quality of paddy rice, saves resources, protects the environment, and has low manufacturing cost and a low sales price.
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