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Biomass charcoal-coated slow release fertilizer preparation technology

A slow-release fertilizer and biomass charcoal technology, applied in fertilizer mixtures, fertilization devices, agricultural gas emission reduction, etc., can solve the problems of high price, restrict the popularization and application of fertilizers, environmental pollution, etc., and achieve a smooth process of nitrogen accumulation and release. Effect

Inactive Publication Date: 2016-06-22
JIANGYIN LIANYE BIOTECHOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of them use fat-soluble substances in the production process, which is easy to pollute the environment after application, and the price is expensive, which limits the popularization and application of this type of fertilizer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation technology of the biochar wrapping slow-release fertilizer of embodiment 1 comprises the following steps:

[0016] S1: Pour the urea particles with uniform particle size into the rotating drum, heat to 40°C, and spray the adhesive on the urea;

[0017] S2: Put the carbonized rice husk into the drum, and spray the adhesive to roll the material into granules at the same time, repeat several times until all the carbonized rice husks are wrapped, and then the biochar-wrapped slow-release fertilizer is obtained.

[0018] Wherein, the particle size of the carbonized rice husk is 40 mesh.

[0019] Wherein, the adhesive is polyvinyl alcohol aqueous solution.

[0020] Wherein, the weight percent of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 4%.

[0021] Wherein, the amount of carbonized rice husk is 10% of the weight of urea granules.

Embodiment 2

[0023] The preparation technology of the biochar wrapping slow-release fertilizer of embodiment 2 comprises the following steps:

[0024] S1: Pour the urea particles with uniform particle size into the rotating drum, heat to 40°C, and spray the adhesive on the urea;

[0025] S2: Put the carbonized rice husk into the drum, and spray the adhesive to roll the material into granules at the same time, repeat several times until all the carbonized rice husks are wrapped, and then the biochar-wrapped slow-release fertilizer is obtained.

[0026] Wherein, the particle size of the carbonized rice husk is 60 mesh.

[0027] Wherein, the adhesive is polyvinyl alcohol aqueous solution.

[0028] Wherein, the weight percent of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 6%.

[0029] Wherein, the amount of carbonized rice husk is 20% of the weight of urea granules.

Embodiment 3

[0031] The preparation technology of the biochar wrapping slow-release fertilizer of embodiment 3 comprises the following steps:

[0032] S1: Pour the urea particles with uniform particle size into the rotating drum, heat to 40°C, and spray the adhesive on the urea;

[0033] S2: Put the carbonized rice husk into the drum, and spray the adhesive to roll the material into granules at the same time, repeat several times until all the carbonized rice husks are wrapped, and then the biochar-wrapped slow-release fertilizer is obtained.

[0034] Wherein, the particle size of the carbonized rice husk is 50 mesh.

[0035] Wherein, the adhesive is polyvinyl alcohol aqueous solution.

[0036] Wherein, the weight percent of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 5%.

[0037] Wherein, the amount of carbonized rice husk is 15% of the weight of urea granules.

[0038] The wrapping materials can form a relatively complete wrapping layer on the urea granules. The mor...

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Abstract

The invention discloses a biomass charcoal-coated slow release fertilizer preparation technology. The preparation technology comprises adding a binder into urea and bonding biomass charcoal to the urea. The coated slow release fertilizer utilizing biomass charcoal as a coating material and a polyvinyl alcohol aqueous solution with content of 5.0% as a binder has expected slow release effects, has a nutrient release speed decreased along with coating thickness increasing, has a smooth integral nitrogen accumulation release process, has a nutrient release amount of about 80% in culture for about 30 days and is suitable for nutrition demands of a crop with a short growth period.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a preparation process of biochar-wrapped slow-release fertilizers. Background technique [0002] Slow-release fertilizers can not only improve fertilizer use efficiency, but also reduce the negative impact of fertilization on the environment, which has attracted extensive attention of scholars in recent years. The current research on coated slow-release fertilizers mainly focuses on the selection and development of coating materials. Organic polymer coated slow-release fertilizers can slow down nutrient release and improve fertilizer use efficiency, which has been widely recognized. However, most of them use fat-soluble substances in the production process, which is easy to cause pollution to the environment after application, and the price is high, which limits the popularization and application of this type of fertilizer. Therefore, it has become a research hotspot in this field to ...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
CPCY02P60/21Y02A40/22
Inventor 陆建明
Owner JIANGYIN LIANYE BIOTECHOLOGY
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