Moisture-retention sustained and controlled release fertilizer and method of preparing the same

A controlled-release fertilizer, water-retaining technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as restricting large-scale industrial production, inability to achieve scale-up production, and limiting laboratory scale, and achieves improved water utilization. The effect of utilization rate and uniform thickness

Inactive Publication Date: 2009-08-19
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the water-retaining slow-release and controlled-release fertilizers reported in existing articles and published patents have the following problems: the preparation of part of the water-retaining slow-release/controlled-release fertilizers uses slow-release and controlled-release fertilizers in the reactor, triggering polymerization encapsulation A l

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A water-retaining slow-controlled release fertilizer. The water-retaining slow-control release fertilizer integrates the functions of controlling nutrient release and water retention. It is a fertilizer with slow and controlled release of nutrients, drought resistance, water saving and soil structure improvement. The water-retaining fertilizer A type of slow-release and controlled-release fertilizer uses a polymer-coated fertilizer as the core, and a water-retaining layer as the outer layer, forming a water-retaining and controlled-release fertilizer with a double-layer film structure. The polymer-coated fertilizer is coated with a polymer protective layer film material Granular fertilizer (the film material of the polymer protective layer is polyolefin, and the granular fertilizer is urea, that is, polyolefin-coated urea, the particle size of urea is 2 to 5 mm, and the quality of polyolefin of the film material of the protective layer accounts for 2% of the quality of po...

Embodiment 2

[0037] A water-retaining slow-controlled release fertilizer. The water-retaining slow-control release fertilizer integrates the functions of controlling nutrient release and water retention. It is a fertilizer with slow and controlled release of nutrients, drought resistance, water saving and soil structure improvement. The water-retaining fertilizer A type of slow-release and controlled-release fertilizer uses a polymer-coated fertilizer as the core, and a water-retaining layer as the outer layer, forming a water-retaining and controlled-release fertilizer with a double-layer film structure. The polymer-coated fertilizer is coated with a polymer protective layer film material Granular fertilizer (the film material of the protective layer is polyacrylate, the granular fertilizer is 15-15-15 compound fertilizer, that is, polyacrylate coated 15-15-15 compound fertilizer, and the particle size of 15-15-15 compound fertilizer is 2-5mm , the polyacrylate quality of the protective fi...

Embodiment 3

[0045] A water-retaining slow-controlled release fertilizer. The water-retaining slow-control release fertilizer integrates the functions of controlling nutrient release and water retention. It is a fertilizer with slow and controlled release of nutrients, drought resistance, water saving and soil structure improvement. The water-retaining fertilizer A type of slow-release and controlled-release fertilizer uses a polymer-coated fertilizer as the core, and a water-retaining layer as the outer layer, forming a water-retaining and controlled-release fertilizer with a double-layer film structure. The polymer-coated fertilizer is coated with a polymer protective layer film material Granular fertilizer (the film material of the protective layer is polyolefin, the granular fertilizer is 16-16-16 compound fertilizer, the particle size of 16-16-16 compound fertilizer is 2-5mm, and the mass of polyolefin of the film material of the protective layer accounts for 16-16% of the polyolefin co...

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Abstract

The invention discloses a water holding slow-controlled releasing fertilizer and a preparation method thereof, belonging to the technical field of agricultural fertilizers and preparation thereof. Macromolecule coating fertilizer is taken as an inner core and a water holding layer is taken as an outside layer to form a double-coating water holding slow-controlled releasing fertilizer; an inner coating is macromolecule protective layer coating material with nutrition controlling and releasing property; an outside coating is the water holding layer with excellent water holding property. Water retention agent suspension liquid is sprayed to the surface of macromolecule coating fertilizer grains for outside coating; wherein the water retention agent is prepared by taking cyclohexane, emulsifier, acrylic acid, acrylamide, sodium hydroxide, cross linker and evocating agent and adopting the method of opposite phase suspension polymerization. The fertilizer has the function of controlled releasing, drought resistance, water saving, water holding and soil improving and the advantages of high absorption percentage, wear resistance, difficult falling and the like; utilization ratio of liquid manure is improved and the fertilizer can be widely used to desert control, lawn plant, soil improvement, gardening, agriculture and forestry and the like.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers and their preparation, in particular to a water-retaining slow-release fertilizer and a preparation method thereof. Background technique [0002] my country is a large agricultural country, and the proportion of chemical fertilizers in agricultural production investment accounts for about 50%, but the utilization rate of fertilizers in our country is only 30%, which causes a huge waste of economic energy and various environmental problems. Therefore, slow and controlled release fertilizers have become the development direction of agricultural fertilizers in the future, and polymer coated fertilizers are called real slow and controlled release fertilizers by relevant experts. It uses polymer materials to form a thin film on the surface of fertilizers, controls the dissolution rate of fertilizers in the soil, and makes the dissolution rate consistent with the growth needs of plants,...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
Inventor 胡树文刘军陶树明邱小云金可默张远张福锁
Owner CHINA AGRI UNIV
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