20150329433 | ENVIRONMENT-FRIENDLY SLOW-RELEASE SULFUR-BASED NITROGEN POTASSIUM COMPOUND FERTILIZER - Provided is an environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer. The preparation includes first preparing sulfur-based nitrogen potassium compound fertilizer granules, and then conducting primary coating of stearic acid and secondary surface powder dusting of modified zeolite powder on the sulfur-based nitrogen potassium compound fertilizer granules, to obtain the slow-release sulfur-based nitrogen potassium compound fertilizer. The sulfur-based nitrogen potassium compound fertilizer granules are prepared from the following raw materials in parts by weight: 31 to 57 parts of urea, 10 to 20 parts of ammonium sulfate, 20 to 50 parts of potassium sulfate, 6 to 12 parts of a granulating auxiliary agent, and a proper amount of water. | 11-19-2015 |