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Novel algae polysaccharide derivative coated slow-release fertilizer and preparation method thereof

A technology of seaweed polysaccharide and slow-release fertilizer, which is applied in the directions of layered/coated fertilizer, fertilizer mixture, fertilization device, etc. The effect of biodegradability, improving soil environment, increasing membrane strength

Inactive Publication Date: 2018-02-09
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the simple use of seaweed polysaccharides to prepare slow-release fertilizers cannot be used as an ideal slow-release material because of its low film strength, poor slow-release effect, and high initial release rate.

Method used

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  • Novel algae polysaccharide derivative coated slow-release fertilizer and preparation method thereof
  • Novel algae polysaccharide derivative coated slow-release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 1.0 g of a fucoidan C12 saturated fatty acid derivative with a molecular weight of 10KDa in 50 ml of a mixed solution of 1:5 (v / v (ml)) ethanol and water to obtain a solution with a mass fraction of 2%. Dip the granule fertilizer core into the above solution, take out the seaweed slag powder (particle size: 60 mesh) evenly wrapped in the alginate production process immediately after the immersion, put it in a 60°C oven and dry it, which is the finished fucoidan C12 fatty acyl Derivative coated slow-release fertilizer, named slow-release fertilizer 1.

Embodiment 2

[0023] Dissolve 1.0 g of a fucoidan C14 saturated fatty acid derivative with a molecular weight of 300KDa in 50 ml of a mixed solution of 1:5 (v / v (ml)) ethanol and water to obtain a solution with a mass fraction of 2%. Soak the granular fertilizer core in the above solution, immediately take out the seaweed slag powder evenly wrapped in the alginate production process, put it in an oven at 60°C and dry it, and it will be the finished fucoidan C12 fatty acyl derivative coated slow-release fertilizer , named Slow Release Fertilizer 2.

Embodiment 3

[0025] Dissolve 0.5g of 10KDa centipede polysaccharide C16 saturated fatty acid derivative in 1:4 (v / v (ml)) ethanol and water 50ml mixed solution to obtain a solution with a mass fraction of 1%, and select the one with uniform particle size Immerse 30 grains of fertilizer cores in the above solution, take out immediately after immersion and evenly wrap the seaweed slag powder produced in the production process of carrageenan, put it in an oven at 60°C and dry it, and the finished centipede polysaccharide C16 fatty acyl derivative coated slow Release fertilizer, named slow release fertilizer 3.

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Abstract

The invention discloses preparation of novel algae polysaccharide derivative coated slow-release fertilizer. A coating material of the slow-release fertilizer comprises an algae polysaccharide fatty acyl derivative and algae dreg powder generated in a production process of algae gel, wherein the algae polysaccharide fatty acyl derivative is derived from C12 to C18 fatty acyl derivatives of polysaccharides extracted from ocean brown alga, red alga and green alga. The slow-release fertilizer disclosed by the invention takes fertilizer as a core; the core is firstly covered with one layer of algae polysaccharide fatty acyl derivative thin film and the film is covered with the algae dreg powder. According to the slow-release fertilizer provided by the invention, the releasing rate of nutrientsis determined through a water immersion method; the slow-release fertilizer has good slow-release performance and the utilization rate of nutrients can be improved; the coated slow-release fertilizeris mainly applied to economic crops, fruit and vegetable crops, grain crops and the like. The coating material disclosed by the invention is mainly prepared from ocean biological polysaccharides andis easy to degrade, so that the coating material has no pollution to environment; the algae polysaccharide fatty acyl derivative also has hydrophilic and hydrophobic properties and can realize the effect of slowly releasing the fertilizer.

Description

technical field [0001] The invention belongs to the technical field of marine chemical engineering, and in particular relates to a novel seaweed polysaccharide derivative coated slow-release fertilizer and a preparation method thereof. Background technique [0002] Chemical fertilizers play an important role in agricultural production. According to the estimates of the Food and Agriculture Organization of the United Nations (FAO), 40-60% of the increase in food production in developing countries comes from the role of chemical fertilizers. However, due to volatilization, loss, infiltration and other factors, in the current season utilization rate of chemical fertilizers in my country, nitrogen fertilizer is about 30-35%, phosphorus fertilizer is about 10-25%, and potassium fertilizer is about 35-50%, which is far lower than developed country level. Low fertilizer utilization efficiency not only causes huge economic losses, but also causes serious environmental pollution, su...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05G3/80C05G5/30
Inventor 陈晓琳李鹏程刘松于华华邢荣娥秦玉坤李荣锋李克成王雪芹
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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