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Novel slow-release particle magnesium fertilizer and preparation method thereof

A technology of slow-release granules and manufacturing methods, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of low crop utilization rate, insoluble in water, inability to achieve multi-effect slow release, etc., and achieve long-lasting and effective crop shortage Magnesium, good fluidity, the effect of correcting magnesium deficiency in crops

Inactive Publication Date: 2015-06-17
大连亚农农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insoluble in water, easily soluble in dilute acid and ammonium salt solution, very low utilization rate by crops in soil
(3) Granular magnesium fertilizer, using magnesium sulfate monohydrate and magnesium hydroxide for granulation, the prepared granular magnesium fertilizer can partially alleviate the problems of absorption and leaching, but it is still a kind of soluble and difficult to dissolve in essence. The mixture of magnesium-soluble compounds cannot achieve multi-effect slow release and achieve the goal of synchronizing with the absorption of magnesium by crops

Method used

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  • Novel slow-release particle magnesium fertilizer and preparation method thereof
  • Novel slow-release particle magnesium fertilizer and preparation method thereof
  • Novel slow-release particle magnesium fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The second step is to prepare an acidic medium: take nitric acid to prepare a 1% dilute nitric acid solution, and dissolve 1 kg of water-soluble chitosan in 100 L of prepared dilute nitric acid solution to prepare a 1% water-soluble chitosan solution. Sugar acidic solution, then add 20 kg of reserved powder to the water-soluble chitosan acidic solution, and react at 30 degrees Celsius with constant temperature stirring, and the mixed solution obtained after the reaction is complete is the granulation liquid phase;

[0027] The third step, granulation: gradually add the mixed powder into the granulation tray, keep the rotation speed of 50 rpm, infiltrate with a small amount of liquid phase first, and spray the water-soluble chitosan solution while adding the powder, Carry out granulation until the particles reach the required particle size;

[0028] The fourth step, post-processing: the granulated particles are dried, cooled, and sieved to obtain a finished product: MgO3...

Embodiment 2

[0039] The second step, preparation of acidic medium: 1.8 kilograms of water-soluble chitosan is dissolved in 100L mass concentration and is 2% dilute nitric acid solution and makes water-soluble chitosan acidic solution, then in water-soluble chitosan acidic solution, then add The reserved 20 kg of uniformly mixed powder is reacted at 45 degrees Celsius with constant temperature stirring, and the mixed solution obtained after the reaction is complete is used as the granulation liquid phase;

[0040] The third step, granulation: gradually add the mixed powder into the granulation tray, keep the speed of 50 rpm, first infiltrate with a small amount of liquid phase, add the powder, and spray the water-soluble chitosan acid solution , carry out granulation until the particles reach the required particle size;

[0041] The fourth step, post-processing: the granulated particles are dried, cooled, and sieved to obtain a finished product: MgO39.63%, water-soluble chitosan0.18%, 2-4mm...

Embodiment 3

[0049] The second step, preparation of acidic medium: 0.8 kilograms of water-soluble chitosan is dissolved in 100L mass concentration and is 1% dilute nitric acid solution and makes water-soluble chitosan acidic solution, then in water-soluble chitosan acidic solution, then add The reserved 20 kg of uniformly mixed powder is reacted at 40 degrees Celsius with constant temperature stirring, and the mixed solution obtained after the reaction is complete is used as the granulation liquid phase;

[0050] The third step, granulation: gradually add the mixed powder into the granulation tray, keep the rotation speed of 50 rpm, infiltrate with a small amount of liquid phase first, and spray the water-soluble chitosan solution while adding the powder, Carry out granulation until the particles reach the required particle size;

[0051] The fourth step, post-processing: the granulated particles are dried, cooled, and sieved to obtain a finished product: MgO 29.4%, water-soluble chitosan ...

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Abstract

The invention relates to the fertilizer processing field, and provides a novel slow-release particle magnesium fertilizer. A preparation method comprises the following steps: taking magnesium sulfate monohydrate and magnesium oxide as powder, mixing according to corresponding proportion, under acidic medium condition, adding water-soluble chitosan in an acidic medium for dissolving, performing polymerization for granulation, wherein the magnesium fertilizer comprises the following raw materials by mass part: 60-85 parts of magnesium sulfate monohydrate and 15-40 parts of magnesium oxide; taking citric acid and / or diluted nitric acid as an acidic medium, and preparing an water-soluble chitosan solution with mass concentration being 0.1-5%. The produced product has the advantages of uniform particles, mellow shape and high intensity. The fertilizer can be chelated by water-soluble chitosan polyfunctional group, its salt has film moulding property, magnesium fertilizer particles can be uniformly released with quick action, intermediate action and long action, requirements of magnesium of crop during a whole fertility period can be fully satisfied, fertilizer efficiency is high, and economic benefit is obvious.

Description

technical field [0001] The invention belongs to the field of fertilizer processing, in particular to granular magnesium fertilizer for plants. Background technique [0002] China is one of the countries with the most abundant reserves of magnesium resources in the world, but there is a huge difference between the north and the south. Due to the high activity of magnesium ions, it is easy to be leached in areas with high precipitation in the south, resulting in a large area of ​​magnesium deficiency in the soil. And magnesium is an important part of chlorophyll in crops, which plays an important role in plant nutrition. In recent years, with the application of NPK chemical fertilizers, crop yields have also continued to increase, and the amount of magnesium carried by plants from the soil has also continued to increase. , but soil magnesium can not be effectively supplemented, coupled with the reduction of soil organic matter content, the ability to fix metal cations is signi...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 张浩伍华王吉于洋
Owner 大连亚农农业科技有限公司
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