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Controlled-release compound fertilizer

A technology of slow-release compound fertilizer and weight meter, which is applied in the direction of fertilization device, fertilizer mixture, application, etc., can solve the problems of fertilizer loss, fertilizer waste, etc., and achieve the effect of improving the absorption rate

Inactive Publication Date: 2014-07-16
娄志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fertilizers are often lost when it rains or the temperature is high after application, resulting in waste of fertilizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] A slow-release compound fertilizer, comprising by weight: 22 parts of polymerized MDI, 3 parts of paraffin oil, 6 parts of tung oil, 38 parts of calcium dihydrogen phosphate, 15 parts of potassium dihydrogen phosphate, 16 parts of calcium carbonate, and 15 parts of ammonium carbonate.

[0008] During preparation, first mix calcium dihydrogen phosphate, potassium dihydrogen phosphate, calcium carbonate, and ammonium carbonate according to the above proportions and then granulate, mix polymerized MDI, paraffin oil, and tung oil, add them to xylene solution, and stir evenly to make a bag The film liquid is then sprayed on the granulated fertilizer at a temperature of 50°C in a fluidized bed. After the solvent xylene volatilizes, spray again until the film reaches the required thickness and the solvent evaporates. , to obtain a finished product, the slow-release compound fertilizer prepared by the method can control the slow-release time within 3-8 months according to the th...

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PUM

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Abstract

The invention belongs to the field of chemical fertilizers, and relates to a controlled-release compound fertilizer which comprises the following components in parts by weight: 22 parts of polymetric MDI [Methylene Di(phenylene Isocyanate)], 3 parts of paraffin oil, 6 parts of tung oil, 38 parts of calcium dihydrogen phosphate, 15 parts of potassium dihydrogen phosphate, 16 parts of calcium carbonate, and 15 parts of ammonium carbonate. According to the controlled-release compound fertilizer, various fertilizers are mixed with polyurethane which can be used as an encapsulating film to encapsulate the nutritional elements in other fertilizers, thus ensuring that the nutritional elements in the fertilizer cannot be lost; after being applied, the fertilizer is contacted with water of soil through gaps of the film so as to dissolve the fertilizer, so that the controlled release action of the fertilizer can be realized, and the absorption rate of the fertilizer can be improved.

Description

technical field [0001] The invention belongs to the field of chemical fertilizers, in particular to a slow-release compound fertilizer. Background technique [0002] Chemical fertilizers are fertilizers used in existing agriculture. Since the macronutrient elements nitrogen, phosphorus, and potassium in the soil usually cannot meet the needs of crop growth, it is necessary to use chemical fertilizers containing nitrogen, phosphorus, and potassium to supplement them. In the micronutrient elements, except chlorine, which is not lacking in the soil, other nutrients need to be applied with trace element fertilizers. Any chemical fertilizer that contains only one nutrient element that can indicate the content is called a unit fertilizer, such as nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, etc. Any chemical fertilizer that contains two or more of the three nutritional elements nitrogen, phosphorus, and potassium and whose content can be indicated is called c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 娄志
Owner 娄志