Zeolite controlled-release fertilizer and manufacturing method for same

Abstract

The invention provides a zeolite controlled-release fertilizer and a manufacturing method for the same. The zeolite controlled-release fertilizer comprises the following raw materials in the parts by weight: 5-15 parts of biochemical potassium fulvate, 30-50 parts of urea, 10-40 parts of monoammonium phosphate, 15-40 parts of inorganic potassium salt, 1-4 parts of magnesium sulphate, 1-4 parts of calcium nitrate, 1-4 parts of zinc sulphate, 10-30 parts of modified zeolite, 2-5 parts of ammonium ferric citrate, 2-5 parts of emathlite, and 1-4 parts of calcium sulphate. The manufacturing method comprises the following steps of: (1) adding the raw materials aforementioned in a crusher, and crushing; (2) performing the operations of steam humidification, granulation and drying on the crushed raw materials to obtain a zeolite controlled-release fertilizer crude product; and (3) screening the zeolite controlled-release fertilizer crude product obtained in the step (2), wherein the oversize product is the zeolite controlled-release fertilizer. Zeolite is used as a carrier for the active ingredients, and the modified zeolite has multi-channel adsorbability, metal ion exchange property, water absorption and water retention property, acid resistance, alkali resistance, heat resistance, potassium fulvate rapid dissolution property, and the like, as well as achieves controlled release by being matched with proper nitrogen, phosphorus, potassium, calcium, magnesium, zinc and the like.

Description

technical field [0001] The invention relates to a slow and controlled release fertilizer and its preparation method, in particular to a zeolite slow and controlled release fertilizer and its preparation method. Background technique [0002] Slow and controlled release fertilizers refer to fertilizers whose nutrient release rate is slow and the release period is long, which can meet the needs of crop growth during the entire growth period of crops. Slow and controlled release fertilizers can increase crop yields and reduce the release rate over a long period of time. Improves the performance of long-term fertilization. At present, the release rate of the nutrients in the fertilizer in the existing slow and controlled release fertilizer is 10%-15% within 24 hours at 25°C; the nutrient release rate within 28 days is 65%-75%; 90%. Moreover, different carriers are also key to the control of active ingredients, for example: sulfur coating, urine enzyme inhibitors, urea formaldeh...

AI Technical Summary

Problems solved by technology

At present, the release rate of the nutrients in the fertilizer in the existing slow and controlled release fertilizer is 10%-15% within 24 hours at 25°C; the nutrient release rate within 28 days is 65%-75%; 90%

Moreover, different carriers are also key to the control of active ingredients, for example: sulfur coating, urine enzyme inhibitors, urea formaldehyde, etc. can control the release time of nitrogen fertilizers, but have no effect on other elements such as phosphorus and potassium; Can not be degraded, long-term use will destroy the soil structure, not environmentally friendly

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