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A kind of slow-release liquid nitrogen fertilizer, preparation method and application on fruit trees

A slow-release, liquid technology, applied in liquid fertilizers, fertilization methods, applications, etc., can solve the problems of free formaldehyde, large amount of formaldehyde added, environmental pollution, etc. effect of branches

Active Publication Date: 2022-07-22
HEBEI MONBAND WATER SOLUBLE FERTILIZER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a slow-release liquid nitrogen fertilizer, a preparation method and its application on fruit trees, which solves the problem in the related art that the amount of formaldehyde added to the liquid slow-release nitrogen fertilizer is large, and free formaldehyde is produced after application, causing pollution to the environment

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  • A kind of slow-release liquid nitrogen fertilizer, preparation method and application on fruit trees
  • A kind of slow-release liquid nitrogen fertilizer, preparation method and application on fruit trees
  • A kind of slow-release liquid nitrogen fertilizer, preparation method and application on fruit trees

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Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of slow-release liquid nitrogen fertilizer comprises the following steps:

[0029] S1. Materials preparation: 540 kg of urea, 150 kg of glyoxal aqueous solution with a mass concentration of 40%, 25 kg of ethanolamine, 15 kg of ammonium lignosulfonate, 180 kg of magnesium sulfate heptahydrate, and 90 kg of water.

[0030] S2, add 80 kilograms of water, 180 kilograms of magnesium sulfate heptahydrate, and 200 kilograms of urea to the reactor, stir until fully dissolved at 55 ° C, add water to fully dissolve after mixing, obtain a mixed solution, and add ethylene glycol to the mixed solution successively Aqueous aldehyde solution and ethanolamine, react at 55°C for 60min to obtain a reaction solution;

[0031] S3, add 340 kilograms of urea and ammonium lignosulfonate to the reaction solution, make up the liquid to 1000 kilograms with water, and stir until completely dissolved to obtain a slow-release liquid nitrogen fertilizer.

Embodiment 2

[0033] A preparation method of slow-release liquid nitrogen fertilizer comprises the following steps:

[0034] S1. Materials preparation: 550 kg of urea, 133 kg of glyoxal aqueous solution with a mass concentration of 40%, 20 kg of ethanolamine, 13 kg of ammonium lignosulfonate, 200 kg of magnesium sulfate heptahydrate, and 84 kg of water.

[0035] S2, add 81 kilograms of water, 200 kilograms of magnesium sulfate heptahydrate, and 193 kilograms of urea to the reaction kettle, stir until fully dissolved at 60 ° C, add water to fully dissolve after mixing, obtain a mixed solution, and successively add ethylene glycol to the mixed solution Aqueous aldehyde solution and ethanolamine, react at 60°C for 60min to obtain a reaction solution;

[0036] S3, add 357 kilograms of urea and ammonium lignosulfonate to the reaction solution, make up the liquid to 1000 kilograms with water, and stir until completely dissolved to obtain a slow-release liquid nitrogen fertilizer.

Embodiment 3

[0038] A preparation method of slow-release liquid nitrogen fertilizer comprises the following steps:

[0039] S1. Materials preparation: 500 kg of urea, 151 kg of glyoxal aqueous solution with a mass concentration of 40%, 20 kg of ethanolamine, 20 kg of ammonium lignosulfonate, 150 kg of magnesium sulfate heptahydrate, and 159 kg of water.

[0040] S2, add 75 kilograms of water, 150 kilograms of magnesium sulfate heptahydrate, and 200 kilograms of urea to the reactor, stir until fully dissolved at 50 ° C, add water to fully dissolve after mixing, obtain a mixed solution, and successively add ethylene glycol to the mixed solution Aqueous aldehyde solution and ethanolamine were reacted at 50 ° C for 60 min to obtain a reaction solution;

[0041] S3, add 300 kilograms of urea and ammonium lignosulfonate to the reaction solution, supplement the liquid to 1000 kilograms with water, and stir until completely dissolved to obtain a slow-release liquid nitrogen fertilizer.

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Abstract

The invention relates to the technical field of fertilizers, and proposes a slow-release liquid nitrogen fertilizer, a preparation method and an application thereof on fruit trees, wherein the slow-release liquid nitrogen fertilizer is composed of the following components by weight: 50%-55% of urea, Glyoxal 5%-8%, ethanolamine 2%-3%, ammonium lignosulfonate 1%-2%, magnesium sulfate heptahydrate 15%-20%, water balance. The preparation method includes the following steps: S1, preparing materials according to the above formula; S2, mixing magnesium sulfate heptahydrate and 35%-40% urea in the formula amount, adding water to completely dissolve, to obtain a mixed solution, and sequentially adding ethylene glycol to the mixed solution Aldehyde and ethanolamine are reacted to obtain a reaction solution; S3, adding the remaining formula amounts of urea, ammonium lignosulfonate and remaining water to the reaction solution, and mixing evenly to obtain a slow-release liquid nitrogen fertilizer. The above technical solution solves the problem in the related art that the liquid slow-release nitrogen fertilizer adds a large amount of formaldehyde, generates free formaldehyde after application, and causes pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a slow-release liquid nitrogen fertilizer, a preparation method and its application on fruit trees. Background technique [0002] Nitrogen is an indispensable element for crop growth, and it is the main component of protein, chlorophyll and enzymes. When the crop is nitrogen-deficient, the plant is short and thin, the leaves are yellow-green, yellow-orange and other abnormal green, the basal leaves are gradually dry and withered, and the root system is less branched. Nitrogen fertilizer refers to a unit fertilizer that uses nitrogen as the main component and can be applied to the soil to provide nitrogen nutrition for plants. Nitrogen fertilizer is the most widely used, most abundant and most popular fertilizer variety in China. For a long time, a series of environmental problems such as water pollution, soil pollution and agricultural product pollution caused by nitrate ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G3/90C05G5/20A01C21/00A01G17/00
CPCC05C3/00C05G3/40C05G3/90C05G5/20A01C21/00A01G17/005C05C9/00C05D5/00
Inventor 王学虎石海强刘赛段超郑志光
Owner HEBEI MONBAND WATER SOLUBLE FERTILIZER CO LTD