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Polydopamine coated controlled-release fertilizer

A polydopamine coating, slow-release fertilizer technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of low fertilizer utilization, unreasonable utilization, loss and the like

Inactive Publication Date: 2013-03-20
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to various reasons such as irrational use of fertilizers, volatilization, loss, infiltration, and microbial action of fertilizers, the utilization rate of fertilizers is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1 Preparation of potassium copper pyrophosphate trihydrate: Slowly add 0.1 mol / liter of copper sulfate solution to 0.1 mol / liter of potassium pyrophosphate solution, after stirring for 5 hours, the mixture is aged for 24 hours, filtered , and dried to obtain the product.

Embodiment 2

[0011] Example 2 Preparation of polydopamine-coated slow-release fertilizer: Weigh 0.2g dopamine and dissolve it in 200mL TRIs-HCl (pH=8.5) solution, add 2g potassium copper pyrophosphate trihydrate to the solution, and pass through 24 hours reaction (room temperature), and obtain the polydopamine-coated slow-release fertilizer by centrifugal washing. The fertilizer contains phosphorous potassium copper.

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PUM

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Abstract

The invention relates to preparation of a polydopamine coated controlled-release fertilizer, and in particular relates to a polydopamine coated slow-release fertilizer which is prepared by coating a substrate which is copper potassium pyrophosphate trihydrate by dopamine; the slow-release fertilizer consists of phosphorus, potassium, copper and nitrogen, and is a fertilizer which integrates a great amount of elements and trace elements and has a controlled-release function, wherein contents of various nutrient elements of the fertilizer are as follows: 38.0% of phosphorus, 6.5% of potassium and 26.45% of copper; and accumulative release amount of the fertilizer in 30days just includes 10% of phosphorus, 3.2% of potassium and 7.1% of copper.

Description

technical field [0001] The invention relates to the preparation of a polydopamine-coated slow-release fertilizer, in particular to a polydopamine-coated slow-release fertilizer prepared by coating copper pyrophosphate trihydrate with dopamine as a substrate. The slow-release fertilizer contains phosphorus , Potassium, Copper and Nitrogen, it is a fertilizer that integrates macroelements and microelements and has a slow-release function. The content of each nutrient element of the fertilizer is: phosphorus 38.0%, potassium 6.5%, copper 26.45%; the cumulative release amount of the fertilizer in 30 days is only 10% phosphorus, potassium 3.2%, copper 7.1%. Background technique [0002] my country is a large agricultural country, and agriculture is the foundation of the national economy and an irreplaceable primary industry. The characteristics of modern agriculture are low cost, high output, high efficiency and sustainable development. Therefore, the closely related fertilizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/02C05G3/60
Inventor 贾鑫马志远
Owner SHIHEZI UNIVERSITY