Preparation method of sustained-release basic potassium nitrogen compound fertilizer

摘要

The present invention relates to a method for preparing a sustained sustained-release basic nitrogen / potassium compound fertilizer, and belongs to a mixed fertilizer containing a substance that affects the absorption action of ammonium compounds or urea in soil. The basic nitrogen potassium particles are first made, and then the surface of the basic nitrogen potassium particles is coated with stearic acid once and the modified zeolite is powdered twice. The particles are made of the following weight fraction materials, that is, urea 30-60, ammonium chloride 10-20, potassium chloride 22-53, granulation aid 7-11, appropriate amount of water, etc. , The utilization rate of fertilizer effect is high, the role of chlorine element in compound fertilizer can be fully demonstrated during crop growth, the process is simple, the production cost is low, the coating film material is easily biodegraded by microorganisms in the soil, Providing a preparation method of sustained-release basic potassium nitrogen fertilizer that is beneficial for soil, air and water environment conservation, good sustained-release effect, high fertilizer utilization, ideal for use in various applications A.