Slow-release fertilizer

A slow-release, chemical fertilizer technology, applied in fertilization devices, fertilizer mixtures, layered/coated fertilizers, etc., can solve the problems of short release period of slow-release chemical fertilizers, high fertilizer penetration ability of amino resins, and no practical value. achieve low cost

Inactive Publication Date: 2018-11-13
付旭升
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino resin is a slow-release nitrogen fertilizer. The slow-release fertilizer can be made by using amino resin coating, but the amino resin has a large fertilizer penetration ability. The release period of the slow-release fertilizer made by using pure amino resin coating alone is too short, and there is no real effect. Practical value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0016] Example 1: Add spherical industrial urea with a particle size of 2 to 3 mm into the drum coating equipment, rotate the drum to keep the spherical urea in a flowing state, and keep the temperature of the spherical urea in the drum at 95°C. Slowly spray the polyvinyl alcohol-modified urea-formaldehyde resin prepolymer aqueous solution containing montmorillonite (SM-LV type) on the surface of spherical urea until the polyvinyl alcohol-modified urea-formaldehyde resin-montmorillonite composite film is formed. (The mass ratio of montmorillonite: polyvinyl alcohol modified urea-formaldehyde resin is 1:99) The quality reaches 20% of the total mass of the final product slow-release urea. Fully dry to remove water in the film layer, and fully solidify the polyvinyl alcohol-modified urea-formaldehyde resin in the film layer to obtain the slow-release urea of ​​the present invention.

Embodiment 2

[0017] Example 2: Add spherical industrial urea with a particle size of 2-3mm into the drum coating equipment, rotate the drum to make the spherical urea flow, and keep the temperature of the spherical urea in the drum at 95°C. Slowly spray the polyvinyl alcohol-modified urea-formaldehyde resin prepolymer aqueous solution containing montmorillonite (SM-LV type) on the surface of spherical urea until the polyvinyl alcohol-modified urea-formaldehyde resin-montmorillonite composite film is formed. (The mass ratio of montmorillonite: polyvinyl alcohol modified urea-formaldehyde resin is 1:49) The quality reaches 20% of the total mass of the final product slow-release urea. Fully dry to remove water in the film layer, and fully solidify the polyvinyl alcohol-modified urea-formaldehyde resin in the film layer to obtain the slow-release urea of ​​the present invention.

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Abstract

The invention relates to a slow-release fertilizer which comprises a fertilizer core and an outer envelope. The outer envelope is provided with a composite film layer of amine resin-montmorillonite compound film layer and a degradable polymer film layer. The slow-release fertilizer is a complete coated slow-release fertilizer and is environmentally friendly and low in cost.

Description

technical field [0001] The invention relates to a chemical fertilizer, in particular to a slow-release chemical fertilizer. Background technique [0002] Slow-release chemical fertilizers meet the requirements of environmental protection and sustainable agricultural development, and are the development direction of agricultural chemical fertilizers in the world. Among them, coated slow-release chemical fertilizers will be the mainstream of slow-release chemical fertilizers in the future. However, the coatings of the current coated slow-release fertilizer products are useless to crops, and most of them cannot be degraded by the environment and will remain in the soil to pollute the environment, such as epoxy resin, polyurethane, polyethylene, polypropylene, polyvinyl chloride, etc. The fertilizer plastid is used as the coating material, which is harmless to the environment and high in fertilizer quality. Therefore, the slow-release chemical fertilizer is expected in the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
CPCC05G3/90C05G5/37
Inventor 付旭升
Owner 付旭升
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