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Sustained-release compound fertilizer and preparation method thereof

A slow-release compound fertilizer and monoammonium phosphate technology, which is applied in the field of slow-release compound fertilizer and its preparation, can solve the problems of difficult degradation of coating materials, complex production process, and high manufacturing cost, and achieve easy degradation, simple production process, and equipment The effect of less investment

Inactive Publication Date: 2014-03-19
青岛中科菲力工程技术研发有限公司
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  • Claims
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Problems solved by technology

However, the existing slow-release compound fertilizers have not been popularized and applied on a large scale due to complex production processes, high manufacturing costs, difficult degradation of coating materials, and environmental pollution.

Method used

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  • Sustained-release compound fertilizer and preparation method thereof

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Embodiment Construction

[0013] A slow-release compound fertilizer made from the following raw materials by weight (kg): urea 25, monoammonium phosphate 40, superphosphate 7, potassium chloride 10, zinc sulfate 1.5, manganese sulfate 1, ferrous sulfate 2, borax 1. Humic acid 4. Modified clay powder 10. Chitosan coating agent 5.

[0014] The preparation method of the modified clay powder is as follows: a. Weigh attapulgite, illite, and diatomaceous earth in a weight ratio of 4:3:2, mix them evenly, wet ball mill for 36 hours, dry, and calcinate at 840°C 1h, then continue to heat up to 1260°C, calcine for 30min, quench in water, take out the wet ball mill for 24h, and pass through a 150-mesh sieve; Sodium polyphosphate, 3% citric acid and 2% sodium lauryl sulfate, high-speed grinding 15min, spray-dried into powder; c, get the solid content that is equivalent to 20% of attapulgite weight and be 45% nano-silica sol, add 8 % sodium polyacrylate, 5% polyvinyl alcohol, 3% plant ash, 2% carboxymethy...

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Abstract

The invention discloses a sustained-release compound fertilizer and a preparation method thereof. The sustained-release compound fertilizer is prepared from the following raw materials in parts by weight: 20 to 30 parts of urea, 30 to 40 parts of monoammonium phosphate, 5 to 10 parts of calcium superphosphate, 10 to 15 parts of potassium chloride, 1 to 2 parts of zinc sulfate, 1 to 2 parts of manganese sulfate, 2 to 3 parts of ferrous sulfate, 0.5 to 1.5 parts of borax, 3 to 5 parts of humic acid, 8 to 12 parts of modified clay and 4 to 6 parts of chitosan coating agent. The fertilizer has high sustained-release performance, double good functions of pest killing and water retention, high and long-lasting fertilizer efficiency and high nutrition utilization rate, a coating material is easy to degrade, pollution is completely avoided, the rapid growth of crops can be promoted, the stress resistance of the crops can be improved, the ecological balance of soil can be adjusted, the quality of agricultural products can be improved, and both production and income of the agricultural products are increased. Sources of the raw materials are extensive, and a production process is simple, convenient to operate, low in equipment investment, low in cost and applicable to industrial production, and has a broad market prospect.

Description

technical field [0001] The invention relates to a slow-release compound fertilizer and a preparation method thereof, belonging to the technical field of agricultural fertilizers. Background technique [0002] my country is a large agricultural country, and chemical fertilizers play a very important role in agricultural production. The currently used chemical fertilizers are quickly dissolved, decomposed, volatilized, and lost after being applied to the soil, resulting in low nutrient utilization. The provision of nutrients is not suitable; not only the waste of resources, but also the increase of agricultural costs, the loss of chemical fertilizers pollute the water body, the atmosphere and the soil environment, posing a threat to the environment on which human beings depend. Therefore, slow-release compound fertilizers have become the research target of industry insiders. However, the existing slow-release compound fertilizers have not been popularized and applied on a lar...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/02C05G3/60
Inventor 王胖
Owner 青岛中科菲力工程技术研发有限公司
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