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Microelement sustained-release fertilizer and preparation method thereof

A technology of trace elements and slow-release fertilizers, applied in the field of agricultural chemistry, can solve the problems of inability to provide effective guidance by technical personnel, limited effect, undisclosed coating material composition and coating process, etc., to ensure continuous and effective release and reduce work. effect of reducing fertilization frequency

Inactive Publication Date: 2018-06-12
武汉天度植物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art also discloses a slow-release fertilizer (CN106007921A) compounding trace elements with cow hair, straw, etc., in order to achieve a slow-release effect through the filling of these organic and inorganic substances, but the effect is still relatively limited
And in the field of preparing slow-release fertilizers, coating is a more commonly used technical means, which directly improves the migration and release of trace elements themselves, and is expected to obtain fertilizers with good slow-release effects; CN104591909A) trace element fertilizer, but it does not disclose its coating material composition and coating process, and cannot provide effective guidance to those skilled in the art

Method used

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  • Microelement sustained-release fertilizer and preparation method thereof
  • Microelement sustained-release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 25g of anhydrous copper sulfate, 40g of zinc sulfate, 10g of manganese nitrate, and 25g of molybdenum sulfate are dissolved in 0.5L of deionized water to be configured as a 200g / L aqueous solution; in the solution, 62.5g of acrylamide and 37.5g of hydroxyethyl acrylate ( The monomer concentration is 16.7wt.%), after stirring to fully dissolve the monomer, the aqueous phase is obtained.

[0031] Add 0.25 g of emulsifier A-105 (HLB=8.5) to 800 g of toluene, heat and stir to dissolve it, and obtain an oil phase. The water phase was mixed with the oil phase, treated under 250W ultrasonic for 20 min to obtain a fully emulsified microemulsion, and the temperature of the emulsion was raised to 55°C.

[0032] Dissolve 20 g of ammonium persulfate in 50 mL of water, and add it dropwise to the aforementioned emulsion within 2 hours under the same ultrasonic action to initiate a polymerization reaction. After the dropwise addition, continue to react for 1 hour under the same condit...

Embodiment 2

[0035] 70g molybdenum nitrate, 40g ferric sulfate, 30g copper nitrate, 50g manganese sulfate and 50g zinc nitrate are dissolved in 0.8L deionized water, configure the aqueous solution of 300g / L; Drop into 56g acrylamide and 44g methylol acrylate ( The concentration of the monomer is 11.1wt.%), after stirring to fully dissolve the monomer, an aqueous phase is obtained.

[0036] Add 0.5 g of Span S-80 (HLB=4.3) into 100 g of petroleum ether, heat and stir to dissolve it, and obtain an oil phase. The water phase was mixed with the oil phase, and a fully emulsified microemulsion was obtained under mechanical stirring at 250 rpm, and the temperature of the emulsion was raised to 45°C.

[0037] Dissolve 30g of ammonium persulfate and 10g of sodium bisulfite in 25mL of water, respectively, and drop them into the aforementioned emulsion at the same speed and temperature within 3 hours to initiate a polymerization reaction. After the dropwise addition, continue the reaction for 1 hour ...

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Abstract

The invention belongs to the field of agricultural chemistry, particularly relates to a microelement sustained-release fertilizer, and further relates to a preparation method of the microelement sustained-release fertilizer. The fertilizer is prepared from, by weight, 10 parts of enveloped monomer, 3-60 parts of water soluble salt of microelements, 2-8 parts of water soluble initiator, 0.01-0.05 part of emulsifier of which the HLB is 3-9, 50-150 parts of oil phase and 10-100 parts of water. The invention provides an enveloped microelement salt solid sustained-release fertilizer, the fertilizerhas better initial release property and durable sustained-release performance, and constant and effective releasing of the microelements can be ensured to reduce fertilizer applying frequency and workloads. The invention further provides a method for preparing the microelement sustained-released fertilizer through inverse emulsion polymerization, and the method is mature and simple in process andhigh in yield.

Description

technical field [0001] The invention belongs to the field of agricultural chemistry, and in particular relates to a trace element slow-release fertilizer, and further relates to a preparation method thereof. Background technique [0002] Trace elements are essential for crop growth. The traditional method of applying trace element fertilizers is generally to put trace element compounds or their compounds with organic fertilizers into the fields, but it is difficult to control the amount of application, especially the uniformity of application, and the trace elements are lost rapidly with irrigation and rainwater washing. , can not achieve the desired effect of increasing fat and production. [0003] In order to solve this technical problem, the microelement fertilizer (CN102702444A, CN106007952A) with slow-release function has been proposed in the prior art, and its basic technical conception is that the microelement fertilizer, organic fertilizer, microbial fertilizer, etc...

Claims

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Application Information

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IPC IPC(8): C05G3/00C08F220/56C08F220/20C08F2/32
CPCC05D9/02C08F2/32C08F220/56C05G5/37C08F220/20
Inventor 吴鸿翔
Owner 武汉天度植物科技有限公司
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