Modified synergistic slow-release compound fertilizer and preparation method thereof

A compound fertilizer and slow-release technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of not achieving full slow-release and controlled-release of N, and achieve the effects of flexible product formula, cost reduction, and equipment investment savings

Inactive Publication Date: 2019-06-07
姜玉贞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to adapt to the development trend of green, energy-saving, environmental protection and high-efficiency fertilizers in the future, the invention patent CN103172453B obtained by the inventor in 2014 relates to a slow-release compound fertilizer and its preparation method, by wrapping 2-3 A wrapping layer, while reducing the cost, avoids the secondary pollution of the soil by organic polymers or polymer materials, but this patented technology uses a mixed phosphate containing crop nutrients and water-soluble slightly soluble as a wrapping agent, using a reactive adhesive The slow-release and controlled-release fertilizer made of multi-layer wrapping layer mainly solves the slow-release of N element in the fertilizer, and does not accomplish the full slow-release and controlled-release of N, P, K. The present invention, on the basis of summarizing the prior art, Through a large number of experimental studies, it has truly achieved the slow release and controlled release of N, P, and K, and the combination of bio-organic and inorganic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Put the water-soluble granular fertilizer core including urea with a particle size of 2.0-5.3mm into the ψ6000 disc wrapping machine of Nanjing Xuanli Equipment Manufacturing Plant, and heat the phosphoric acid liquid with a mass concentration of 25% to 80°C and sprayed on the surface of the core of the water-soluble granular fertilizer, so that the surface of the core of the water-soluble granular fertilizer is evenly wetted, and then add the bio-organic layer. After the surface dries, the above operations are repeated until the described The weight ratio of the water-soluble granular fertilizer core to the bio-organic layer reaches 20:3; the bio-organic layer includes the following raw materials in parts by weight: 2 parts of compound amino acids, 1 part of fulvic acid, 1 part of humic acid, 1 part of protein 1 part, 1 part of bone meal, 1 part of soybean meal, all raw materials are added in sequence every 2 minutes;

[0032] Then, continue to spray the binder, add the...

Embodiment 2

[0035] The water-soluble granular fertilizer core including urea with a particle size of 2.0-5.3mm is added to the ψ6000 disc wrapping machine in Nanjing Xuanli Equipment Manufacturing Plant, and the monoammonium phosphate liquid with a mass concentration of 5% is heated to 80°C and sprayed on the core surface of the water-soluble granular fertilizer, so that the surface of the water-soluble granular fertilizer core is evenly wetted, then add the bio-organic layer, and after the surface becomes dry, repeat the above operation until the The weight ratio of the water-soluble granular fertilizer core to the bio-organic layer reaches 20:10; the bio-organic layer includes the following raw materials in parts by weight: 6 parts of compound amino acids, 20 parts of fulvic acid, 15 parts of humic acid, 15 parts of protein, 10 parts of bone meal, and 20 parts of soybean meal. When adding, add all raw materials in sequence every 5 minutes;

[0036] Then, continue to spray the binder, ad...

Embodiment 3

[0039] Add the water-soluble granular fertilizer core including urea with a particle size of 2.0-5.3mm to the ψ6000 disc wrapping machine of Nanjing Xuanli Equipment Manufacturing Plant, and heat the phosphoric acid liquid with a mass concentration of 30% to 80°C and sprayed on the surface of the core of the water-soluble granular fertilizer, so that the surface of the core of the water-soluble granular fertilizer is evenly wetted, and then add the bio-organic layer. After the surface dries, the above operations are repeated until the described The weight ratio of the water-soluble granular fertilizer core to the bio-organic layer reaches 20:3; the bio-organic layer includes the following raw materials in parts by weight: 2 parts of compound amino acids, 1 part of fulvic acid, 1 part of humic acid, 1 part of protein 1 part, 1 part of bone meal, 10 parts of soybean meal, all raw materials are added in sequence every 2 minutes;

[0040] Then, continue to spray the binder, add th...

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Abstract

The invention discloses a modified synergistic slow-release compound fertilizer and a preparation method thereof, and belongs to the technical field of fertilizers. The modified synergistic slow-release compound fertilizer comprises a water-soluble granular fertilizer core and wrapping layers, and the 2-4 wrapping layers sequentially wrap the outer surface of the water-soluble granular fertilizercore. According to the compound fertilizer and method provided by the invention, the problem of soil hardening and environmental pollution caused by only slow release of N and a low utilization rate of P and K of a current slow-release fertilizer is solved, secondary pollution of an organic polymer or a high-molecular material to soil is avoided while the costs are reduced, the product formula isflexible, no three waste (waste water, waste gas and solid waste) is discharged in the production process, the production process is simplified, the equipment investment is saved, the production transformation of the invention patent results is facilitated, and the slow-release controlled-release effect, fertilizer utilization rate level, and ecological environmental protection of the compound fertilizer provided by the invention are improved to a certain extent.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a modified and synergistic slow-release compound fertilizer and a preparation method thereof. Background technique [0002] At present, long-term unreasonable fertilization not only wastes resources and increases farmers' planting costs, but also leads to agricultural non-point source pollution, soil compaction and acidification, excessive heavy metals, fine particulate matter (PM2.5) and other environmental problems, and serious degradation of cultivated land quality. It seriously threatens the quality and safety of agricultural products and the safety of the ecological environment in my country. [0003] One of the most important tasks in the current development of the chemical fertilizer industry is to increase the overall utilization rate of fertilizers. There are many ways to increase the utilization rate of chemical fertilizers. With the development of modern economy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 郭建文姜玉贞王好斌李菂萍侯翠红许秀成
Owner 姜玉贞
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