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Marine organism polysaccharide derivative double-layer film slow-release fertilizer and preparation method thereof

A technology of marine biological polysaccharides and slow-release fertilizers, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of reducing the pores and solubility of membrane materials, failing to achieve slow-release effects, and high initial release rates, and achieve good slow-release Effects, Improving Plant Immunity, Ease of Degradation

Inactive Publication Date: 2016-02-17
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 marine biological polysaccharide coatings has low film strength, poor slow-release effect, and high initial release rate, which cannot meet the requirements of the national standard GB / T23348-2009
Derivatization of marine biological polysaccharides can reduce the pores and solubility of membrane materials, but still cannot achieve a good sustained release effect

Method used

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  • Marine organism polysaccharide derivative double-layer film slow-release fertilizer and preparation method thereof
  • Marine organism polysaccharide derivative double-layer film slow-release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (microcrystalline wax chitosan glutaraldehyde crosslinked double-layer membrane slow-release fertilizer)

[0025] Dissolve 6 g of chitosan in 400 mL of 2% acetic acid solution to obtain a chitosan solution with a mass fraction of 1.5%, add 300 μL of glutaraldehyde with a mass fraction of 50%, and stir at room temperature until the solution is yellow and viscous. Weigh 100g of fertilizer (commercially available common fertilizer) and dip it in, take it out and lay it flat, place it in an oven to dry at 60°C, and screen the fertilizer with uniform coating. Heat the microcrystalline wax in a water bath at 95°C until it is completely dissolved, immerse it in the above-mentioned coated fertilizer, take it out and quickly add it to deionized water (at room temperature), the dissolved microcrystalline wax solidifies quickly on the surface of the fertilizer when it is cold, and then lay it flat to dry .

Embodiment 2

[0026] Embodiment 2 (microcrystalline wax calcium alginate double-layer film slow-release fertilizer)

[0027] Dissolve 10 g of sodium alginate in 500 mL of deionized water to obtain a 2% sodium alginate solution. Weigh 100g of fertilizer (commercially available common fertilizer) and immerse it into a calcium chloride solution with a mass fraction of 5%, take it out and lay it flat, place it in an oven for drying at 60°C, and screen the evenly coated fertilizer. The microcrystalline wax is heated in a water bath at 95°C until it is completely dissolved, immersed in the above-mentioned fertilizer, and quickly added to deionized water (at room temperature) after being taken out. The dissolved microcrystalline wax solidifies quickly on the surface of the fertilizer when it is cold, and it can be flattened to dry.

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Abstract

The invention belongs to marine chemical engineering technologies and particularly relates to a formula of a marine organism polysaccharide derivative double-layer film slow-release fertilizer and a preparation method thereof. Marine organism polysaccharide derivatives serve as an envelope to wrap the surface of a fertilizer, and the double-layer film slow-release fertilizer is formed by the wrapping of microcrystalline wax. The marine organism polysaccharide derivatives account for 1-5% the total weight of the slow-release fertilizer. The microcrystalline wax accounts for 10-20% the total weight of the slow-release fertilizer. According to the obtained slow-release fertilizer, the nutrient release rate is measured through a water immersion method, the slow-release fertilizer has good slow-release effects, and the nutrient utilization rate can be improved. A used envelope material is easy to degrade, the slow-release fertilizer is free of pollution to the environment, a production process is simple, the slow-release fertilizer can be prepared under the experimental conditions, and the slow-release fertilizer is extensive in use range and easy to popularize and apply.

Description

technical field [0001] The invention belongs to marine chemical engineering technology, and in particular relates to a formulation of a marine biological polysaccharide derivative double-film slow-release fertilizer and a preparation method thereof. Background technique [0002] Fertilizers provide nutrients for plants, but most nutrients cannot be absorbed by plants, and the utilization rate of fertilizers is low. The unabsorbed nutrients are released into the soil and groundwater, and are transferred with the groundwater, resulting in eutrophication of the water body. The low utilization rate of fertilizer also causes waste of resources. The emergence of slow-release fertilizers provides an effective way to solve such problems. Slow-release fertilizers can continuously release nutrients for a period of time, improve fertilizer utilization, reduce environmental pollution, and develop efficient, green and sustainable agriculture. [0003] The application of slow-release f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 李鹏程王晶刘松秦玉坤陈晓琳邢荣娥于华华李克成
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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