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Multifunctional chitin release-controlled fertilizer

A slow-release fertilizer, chitin technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as harm to human health, waste of resources, pollution, etc., and achieve the effects of wide application range, simple equipment, and environmental friendliness.

Inactive Publication Date: 2004-11-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Fertilizer is one of the most important means of production in agriculture. The loss of chemical fertilizer is a very serious problem. It not only causes direct economic loss and wastes a lot of resources, but what is more serious is that the lost chemical fertilizer has and will continue to give us survival The environment brings adverse consequences, such as water pollution, air pollution, agricultural product pollution and greenhouse effect, and will lead to an increase in the incidence of cancer and endanger human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Weigh 8 kg of crab shell powder and 2 kg of sawdust, mix them evenly, and use them as wrapping materials. Weigh 50 kg of granular urea with a size of 2 to 4 mm and put it into a disc wrapping machine, and heat it with hot air. Keep the temperature at 80°C, and spray the binder—50% urea-formaldehyde resin aqueous solution through the spray gun to the fertilizer core intermittently while rotating, sprinkle the wrapping material on the fertilizer core while spraying, until the wrapping material is used up , continue drying, when the moisture content is lower than 4%, the temperature drops to about 65°C, slowly pour in the paraffin wax that has been melted into liquid in advance, stop heating, keep the equipment to continue to rotate, and the sheet temperature drops to room temperature.

Embodiment 2

[0026] Example 2 Weigh 20 kg of shrimp shell powder and 5 kg of sawdust, mix them evenly, and use them as wrapping materials. Weigh 50 kg of 2-4 mm granular compound fertilizer and put it into a disc wrapping machine, and heat it with hot air. Keep the temperature at 80°C and spray the fertilizer core intermittently with a binder—a polyvinyl formal aqueous solution with a concentration of 10% through the spray gun under the condition of rotation. While spraying, sprinkle the wrapping material on the fertilizer core until it is wrapped. After the material is used, continue to dry. When the moisture content is lower than 4%, the temperature drops to about 65°C, slowly pour in the paraffin wax that has been melted into liquid in advance, stop heating, keep the equipment to continue to rotate, and the sheet temperature drops to room temperature. .

Embodiment 3

[0027] Example 3 Weigh 8 kg of shrimp shell powder, 5 kg of talc powder, and 0.5 kg of urease inhibitor N-butylthiophosphoric triamide (NBPT), mix them evenly, and weigh 50 kg of 2-4 mm The granular urea is put into the disc wrapping machine and heated by hot air. Keep the temperature at 80°C, and in the case of rotation, intermittently spray the binder—a 2% guar gum aqueous solution through the spray gun to the fertilizer core, sprinkle the wrapping material on the fertilizer core while spraying, until the wrapping material is used After completion, continue drying. When the moisture content is lower than 4%, the temperature drops to about 65°C, slowly pour in the paraffin wax that has been melted into liquid in advance, stop heating, keep the equipment to continue to rotate, and the sheet temperature drops to room temperature.

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Abstract

The invention relates to a multifunctional slow release chitin fertilizer which comprises 15-80% wt of fertilizer, 10-80% wt of powder containing chitin, 5-35% wt of adhesive, 0-40% wt of filling agent, 0-20% wt of active composition and 0-10% wt of sealant. The fertilizer is prepared through granulation or bundling processes.

Description

technical field [0001] The invention relates to a multifunctional slow-release fertilizer, in particular to a granular slow-release fertilizer containing chitin. Background technique [0002] Chitin, also known as chitin and chitin, is a natural polysaccharide polymer compound that widely exists in the shells of crustaceans such as shrimps and crabs, the cuticles of insects, and the cell walls of many fungi in nature. It is the second largest natural polymer after cellulose in nature, and it is also the largest nitrogen-containing natural organic compound on earth except protein. In recent years, chitin has been widely used in agriculture. As a new plant growth regulator, it can stimulate seed germination, promote crop growth, increase yield, and improve quality; as a soil improver, it can change the soil microbial flora, promote the growth of actinomycetes and other beneficial microorganisms in the soil, and inhibit the soil. The growth and repro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08L5/08
Inventor 陈强吕伟娇张文清金鑫荣邓修
Owner EAST CHINA UNIV OF SCI & TECH
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