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High-nitrogen clear liquid foliar fertilizer and its preparation method and application

A high-nitrogen clear liquid and foliar fertilizer technology, applied in fertilization methods, applications, fertilization devices, etc., can solve the problems of low nitrogen, phosphorus and potassium active ingredients, limited chelation ability, unstable properties, etc., and achieve high nutrient element content , good crop absorption, low temperature storage effect

Active Publication Date: 2016-08-17
CHENGDU NEWSUN CROPSCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing clear liquid type liquid fertilizer has the following problems: due to the low solubility of phosphate, the effective nutrient content exceeds 20% at normal temperature, and crystals are easily precipitated, and the properties are unstable. Therefore, the effective components of nitrogen, phosphorus and potassium in the existing liquid fertilizer are relatively low , affects the use effect, is not welcomed by farmers, and the cost of transportation, management, production and use increases
On the other hand, it is generally impossible to add trace elements to liquid fertilizers, because trace elements such as zinc, boron, manganese, calcium, etc. are mixed with each other or with phosphorus to produce precipitation, which affects the properties and use effect; while using The EDTA complexing agent solves the problem of adding trace elements, and because the complexing agent is expensive, it is difficult to promote in actual production. In addition, humic acid is also used as the main chelating agent, but the humic acid itself has limited chelating ability and has limited chelating ability with trace elements. After combining, its water solubility will become poor, the system will be suspended, the filterability will be poor, and the product will easily produce a large amount of precipitation, which will seriously affect the appearance of the product.

Method used

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  • High-nitrogen clear liquid foliar fertilizer and its preparation method and application
  • High-nitrogen clear liquid foliar fertilizer and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0028] The preparation method of high-nitrogen clear liquid type foliage fertilizer of the present invention, its steps are as follows:

[0029] a. Chelation: react mixture A at 80-95°C for at least 1 hour to obtain chelate;

[0030] b. Compounding: Add substance B into the chelate and mix well to obtain high-nitrogen clear liquid foliar fertilizer.

[0031] Among them, the chelation temperature cannot exceed 100°C, otherwise ammonium nitrate, copper nitrate, and ferric nitrate will decompose, and the chelation temperature should not be too low, otherwise it will affect the chelation reaction. Therefore, the chelation temperature is 80-95°C. Suitable, preferably 90-95°C. The lower the temperature, the longer the time required for chelation. The chelation reaction at 80°C for 5 hours can be completely completed, and the reaction time of more than 5 hours does not affect the product quality. To ensure economical efficiency, the reaction time is preferably 1 to 5 hours, more pr...

Embodiment 1

[0036] Composition of mixture A: calcium nitrate 37.2g, magnesium nitrate 17g, ammonium nitrate 13.4g, glycerin 13g, zinc nitrate 0.3g, 50% manganese nitrate solution 0.3g, copper nitrate 0.3g, iron nitrate 0.6g.

[0037] Composition of substance B: 0.3 g of boric acid, 0.1 g of ammonium molybdate, and 10.6 g of urea.

[0038] Put the mixture A into the stirred reactor, seal the reactor well, turn on the condensing reflux device and start stirring, and at the same time turn on the steam to raise the temperature, start timing when the temperature rises to 90°C, adjust the amount of steam to control the temperature between 90-95°C , chelation reaction for 2 hours; Substance B was dissolved in 6.9g of distilled water, stirred and dissolved completely, after the chelation reaction was completed, cooling water was passed to lower the temperature in the kettle to below 40°C, and then the dissolved solution was pumped into it, and stirred Evenly, filter and discharge after standing s...

Embodiment 2～ Embodiment 7

[0040] The formula of mixture A and substance B is changed, and the parameters of chelation reaction are changed to obtain nitrogen clear liquid foliar fertilizer. Table 1 lists the specific formulations and reaction parameters of Examples 1 to 7.

[0041] Table 1

[0042]

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Abstract

The invention relates to a high-nitrogen clear liquid foliage fertilizer and a preparation method and application thereof, belonging to the field of fertilizers. The technical problem solved by the invention is to provide high-nitrogen clear liquid foliage fertilizer. The high-nitrogen clear liquid foliar fertilizer of the present invention uses water as a carrier, and its active ingredient is obtained by adding substance B after mixture A is subjected to chelation reaction; wherein, the mixture A is composed of the following components by weight: 13-18 parts of ammonium nitrate, 30-40 parts of calcium nitrate, 15-20 parts of magnesium nitrate, 12.5-14 parts of glycerol, and the substance B is 10-14 parts by weight of urea. The high-nitrogen clear liquid foliar fertilizer of the present invention is produced by a chelation process, which is safe and environmentally friendly, and has better crop absorption. Its nitrogen content is ≥220g / L, calcium content is ≥80g / L, and magnesium content is ≥24g / L. It can be mixed with water It is miscible, and the liquid medicine is clear and transparent, low viscosity, good fluidity, and more resistant to low temperature storage.

Description

technical field [0001] The invention relates to a high-nitrogen clear liquid foliage fertilizer and a preparation method and application thereof, belonging to the field of fertilizers. Background technique [0002] Liquid fertilizer, also known as liquid fertilizer, is a liquid product containing one or more nutrients needed by crops. These nutrients are dissolved in water as solutes to form a solution, or suspended in water with the help of a suspending agent to form a suspension. There are many kinds of liquid fertilizers, which can be roughly divided into two types: suspension type and clear liquid type. [0003] Clear liquid fertilizers are usually formulated with basic fertilizers such as ammonium polyphosphate, polyphosphoric acid, nitrophosphate fertilizer, nitrogen solution and potassium salt. The nutrients contained in them are completely dissolved and do not contain dispersed solid particles, so the nutrition is more balanced. , More convenient to use and more st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00A01C21/00
Inventor 何其明刘文涛黄廷伟李炳涛李良德
Owner CHENGDU NEWSUN CROPSCI
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