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Zinc-rich coating material, preparation method of material, zinc-rich coated sustained and controlled release fertilizer, and preparation method of fertilizer

A technology of coated materials and controlled-release fertilizers, applied in the direction of layered/coated fertilizers, organic fertilizers, fertilizer mixtures, etc., can solve the problems of increasing fertilizer costs and limiting wide application, so as to improve utilization efficiency, prolong degradation time, Guaranteed absorption effect

Inactive Publication Date: 2016-11-09
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coated slow and controlled release fertilizer is limited by the coating material and process, which increases the cost of the fertilizer, so it limits its wide application in my country, a large agricultural country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of zinc-rich coating material

[0024] Add 8L of distilled water, 800g of wheat starch, 150g of lotus leaf powder, 50g of chelated zinc, 50g of madder powder, and 100g of humic acid into a reaction kettle equipped with a stirrer, thermometer, condenser and heating device, and stir at room temperature for 1 hour. Heat to 60°C for gelatinization, then add 20g of cross-linking agent N,N'-methylenebisacrylamide and 30g of glycerol, reflux at 90°C for 2-3 hours, cool and discharge to obtain the product.

[0025] (2) Preparation of zinc-rich coated slow-release fertilizer

[0026] Put 5kg of granular urea with a particle size of 3-4mm into the fluidized fluidized bed, preheat it to 80°C, and spray 5kg of the above-mentioned zinc-rich coating material on the surface of granular urea from a double-flow nozzle at a spraying speed of about 30g / min , while blowing and drying with hot air, the temperature of the hot air is 90° C., to obtain a zinc-rich coated slow-...

Embodiment 2

[0029] (1) Preparation of zinc-rich coating material

[0030] Add 6.5L of distilled water, 650g of wheat starch, 50g of lotus leaf powder, 10g of chelated zinc, 10g of madder powder, and 10g of humic acid into a reaction kettle equipped with a stirrer, thermometer, condenser and heating device, and stir at room temperature for 1 hour , heat to 60°C for gelatinization, then add 1g of cross-linking agent N,N'-methylenebisacrylamide and 1g of glycerol, reflux at 90°C for 2-3 hours, cool and discharge to obtain.

[0031] (2) Preparation of zinc-rich coated slow-release fertilizer

[0032] Put 5kg of granular urea with a particle size of 3-4mm into the fluidized fluidized bed, preheat it to 80°C, and spray 1kg of the above-mentioned zinc-rich coating material on the surface of granular urea from a double-flow nozzle at a spraying speed of about 30g / min , while blowing and drying with hot air, the temperature of the hot air is 90° C., to obtain a zinc-rich coated slow-controlled re...

Embodiment 3

[0035] (1) Preparation of zinc-rich coating material

[0036] Add 4L of distilled water, 750g of wheat starch, 100g of lotus leaf powder, 30g of chelated zinc, 30g of madder powder, and 1g of humic acid into a reaction kettle equipped with a stirrer, thermometer, condenser and heating device, and stir at room temperature for 1 hour. Heat to 90°C for gelatinization, then add 15g of cross-linking agent N,N'-methylenebisacrylamide and 10g of glycerol, reflux at 100°C for 2-3 hours, cool and discharge to obtain the product.

[0037] (2) Preparation of zinc-rich coated slow-release fertilizer

[0038]Put 5kg of granular urea with a particle size of 3-4mm into the fluidized fluidized bed, preheat it to 80°C, and spray 7kg of the above-mentioned zinc-rich coating material on the surface of granular urea from a double-flow nozzle at a spraying speed of about 30g / min , while blowing and drying with hot air, the temperature of the hot air is 90° C., to obtain a zinc-rich coated slow-co...

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Abstract

The invention belongs to the field of fertilizer sustained and controlled release, and concretely relates to a zinc-rich coating material, a preparation method of the material, a zinc-rich coated sustained and controlled release fertilizer, and a preparation method of the fertilizer. The zinc-rich coating material comprises, by weight, 65-80 parts of starch, 5-15 parts of lotus leaf powder, 1-5 parts of chelated zinc, 1-5 parts of Rubia cordifolia powder, 0-10 parts of humic acid and 0.2-5 parts of a cross-linking agent. The zinc-rich coated sustained and controlled release fertilizer comprises a fertilizer core and a zinc-rich coating for coating the fertilizer core, the fertilizer core is a water-soluble granular fertilizer, and the zinc-rich coating is produced from the zinc-rich coating material. The cheap and environmentally-friendly starch, lotus leaf powder, humic acid and other polymeric materials are adopted as main raw materials, and are blended with chelated zinc and Rubia cordifolia traditional Chinese medicine components to cross-link and modify the main raw materials in order to prepare the zinc-rich coating material and the zinc-rich coated sustained and controlled release fertilizer. The coating material can effectively prolong the water dissolving time and the time of degradation in water to realize slow release of the zinc element contained in the material and the fertilizer coated with the material.

Description

technical field [0001] The invention belongs to the field of slow and controlled release of fertilizers, and in particular relates to a zinc-rich coating material and a preparation method thereof, and a zinc-rich coating slow and controlled release fertilizer and a preparation method thereof. Background technique [0002] Nowadays, chemical fertilizers play a great role in the cultivation of crops, not only can reduce pests and diseases, but also increase crop yield; at the same time, the loss and volatilization of chemical fertilizers lead to the incomplete absorption and utilization of chemical fertilizers by plants, and also cause a lot of pollution to the environment . Therefore, the development of new slow and controlled release fertilizers has become a research focus, in order to change the characteristics of chemical fertilizers to improve the utilization rate of fertilizers and reduce environmental pollution. Slow and controlled-release fertilizers realize the balan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05C9/00C05D9/02C05G3/00C05G3/80C05G5/30C05F11/00C05F11/02
Inventor 徐祖顺李庆张淑来庞龙童豪栗静
Owner HUBEI UNIV
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