Fertilizer possessing slow-release water-retention function and preparation method of fertilizer

A fertilizer and functional technology, applied in the field of slow and controlled release fertilizers, can solve the problems of insufficient utilization rate, large amount, and ineffective use of field fertilizers, etc., and achieve the effects of reducing the amount of chemical fertilizers, good roundness, and improving soil water retention

Pending Publication Date: 2017-10-20
山东新朝阳作物营养有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the application of chemical fertilizers in agriculture, there are generally problems such as large dosage, insufficient utilization rate, and ineffective use of field fertilizers. Usually, slow-release fertilizers are a good solution

Method used

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  • Fertilizer possessing slow-release water-retention function and preparation method of fertilizer
  • Fertilizer possessing slow-release water-retention function and preparation method of fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare 1L of water, and when the water is heated to 80°C, slowly add 1g of carboxymethyl chitin and 10g of polyacrylamide to form a suspension; the mass ratio of the suspension to 35% formaldehyde solution is 1:1 Mix with each other to make a paste; add urea, react to form a homogeneous state, add polyphosphoric acid (polymerization degree 22) and react for 40 minutes, form a reaction to form a homogeneous liquid state instead of granulation water and steam and some nitrogen and phosphorus elements, Add it to compound fertilizer raw materials and granulate it through granulation equipment to obtain a product that is a fertilizer with slow-release and water-retaining functions. The mass ratio of formaldehyde, urea, and polyphosphoric acid is 1:1:0.2.

[0034] Fertilizer with slow release and water retention function compared with the same content of compound fertilizer and urea-formaldehyde compound fertilizer.

[0035] After measurement, the particle hardness reaches 3...

Embodiment 2

[0044] Prepare 500mL of water, and when the water is heated to 75°C, slowly add 1g of carboxymethyl chitin and 10g of polyacrylamide to form a suspension; the mass ratio of the suspension to 35% formaldehyde solution is 1:1 Mix with each other to make a paste; add urea, react to form a homogeneous state, add polyphosphoric acid (polymerization degree 45) and react for 40 minutes, form a reaction to form a homogeneous liquid state instead of granulation water and steam and part of nitrogen and phosphorus elements, Add it to compound fertilizer raw materials and granulate it with granulation equipment to obtain a product that is a fertilizer with slow-release water retention function, wherein the mass ratio of formaldehyde, urea, and polyphosphoric acid is 1.2:1:0.1.

[0045] Fertilizer with slow release and water retention function compared with the same content of compound fertilizer and urea-formaldehyde compound fertilizer.

[0046] After measurement, the particle hardness r...

Embodiment 3

[0048]Prepare 100mL of water, and when the water is heated to 85°C, slowly add 1g of carboxymethyl chitin and 10g of polyacrylamide to form a suspension; the mass ratio of the suspension to 35% formaldehyde solution is 1:1 Mix with each other to make a paste; add urea, react to form a homogeneous state, add polyphosphoric acid (polymerization degree 30) and react for 40 minutes, form a reaction to form a homogeneous liquid state instead of granulation water and steam and some nitrogen and phosphorus elements, Add it to compound fertilizer raw materials and granulate it with granulation equipment to obtain a product that is a fertilizer with slow-release water retention function, wherein the mass ratio of formaldehyde, urea, and polyphosphoric acid is 1.5:1:0.5.

[0049] Fertilizer with slow release and water retention function compared with the same content of compound fertilizer and urea-formaldehyde compound fertilizer.

[0050] After measurement, the particle hardness reach...

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Abstract

The invention discloses a fertilizer possessing a slow-release water-retention function and a preparation method of the fertilizer. The preparation method comprises: adding carboxymethyl chitin and polyacrylamide to water, performing heating to form a suspension, adding a formaldehyde solution to the suspension, performing adjustment to obtain a pasty liquid, adding urea to the pasty liquid, carrying out a reaction to form a homogeneous liquid, adding polyphosphoric acid to the homogeneous liquid, and performing granulation to obtain the fertilizer possessing a slow-release water-retention function. The prepared fertilizer is greatly improved in the hardness and has a water-retention function.

Description

technical field [0001] The invention relates to the technical field of slow- and controlled-release fertilizers, in particular to a fertilizer whose nutrient slow-release function is mainly provided by cross-linked chitin polyvinylamide and urea-formaldehyde polyphosphate. Background technique [0002] At present, in the application of chemical fertilizers in agriculture, there are generally problems such as large dosage, insufficient utilization rate, and ineffective use of field fertilizers. Usually, slow-release fertilizers are a good solution. How to achieve slow and controlled release fertilizer under the condition of proper nutrient distribution is one of the directions of fertilizer development today. [0003] Slow-release fertilizers, that is, controlled-release fertilizers and slow- and controlled-release fertilizers, in which the nutrients that play a role in plant nutrition are released slowly in the soil, or the speed is controllable to a certain extent, so that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B17/00C05G3/00C05G3/80C05C9/02
Inventor 李茂刚王健靳浩赵旭东李克升王忠刚郑杰殷慧敏吕乐福钟琪刘宇虹
Owner 山东新朝阳作物营养有限公司
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