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Water-retaining slow-dissolving fertilizer and preparation method thereof

A water-retaining, slow-dissolving technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of secondary pollution of the soil environment, high price, complex production process, etc., to promote plant growth, prevent water evaporation, and absorb water well The effect of water retention

Active Publication Date: 2015-09-23
辽宁营港锌硼酸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the coated slow-release fertilizer has good water retention and slow-release functions, the water retention performance is unstable, and most of the water-absorbent resins or other synthetic polymers used in production are polyethylene, polyvinyl alcohol, polypropylene, etc. Non-degradable polymers such as non-degradable polymers are likely to cause secondary pollution to the soil environment, and the production process is complicated and the price is relatively expensive. Most water-retaining slow-dissolving fertilizers are only suitable for cash crops and are rarely used in traditional agriculture.

Method used

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  • Water-retaining slow-dissolving fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of water-retaining slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0043] 55% urea, 10% potassium dihydrogen phosphate, 25% fatty acid ester tamarind polysaccharide gum with a substitution degree of 1.5, 5% tamarind polysaccharide gum, 5% tamarind polysaccharide gum with a substitution degree of 2.0, apatite 0.5%.

[0044] The preparation method steps are as follows:

[0045] (1) Refining 0.5% of apatite into 500-1000 meshes for use;

[0046] (2) Mix 55% urea, 10% potassium dihydrogen phosphate, 5% tamarind polysaccharide gum, 25% fatty acid ester tamarind polysaccharide gum with a substitution degree of 1.5, and 5% acetate tamarind polysaccharide polysaccharide with a substitution degree of 2.0 Glue and 0.5% apatite are pre-mixed in a stirring reactor, the stirring speed is 20r / min~50r / min, and the stirring time is 2h~3h, so that urea, potassium dihydrogen phosphate, tamarind polysaccharide gum, fatty acid E...

Embodiment 2

[0051] A kind of water-retaining slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0052] 15% urea, 60% monoammonium phosphate, 10% fatty acid ester tamarind polysaccharide gum with a substitution degree of 1.0, 10% tamarind polysaccharide gum coupled with vinyl silane, 5% tamarind polysaccharide gum, and 0.5% apatite.

[0053] The preparation method steps are as follows:

[0054] (1) Refining 0.5% of apatite into 500-1000 meshes for use;

[0055] (2), 15% urea, 60% monoammonium phosphate, 5% tamarind polysaccharide gum, 10% fatty acid ester tamarind polysaccharide gum with a substitution degree of 1.0, 10% tamarind polysaccharide gum coupled with vinyl silane, 0.5 %apatite is pre-mixed in a stirred reactor, the stirring speed is 20r / min~50r / min, and the stirring time is 2h~3h, so that the mixture urea, monoammonium phosphate, tamarind polysaccharide gum, fatty acid ester tamarind polysaccharide gum , Tamarind polysaccharide ...

Embodiment 3

[0060] A kind of water-retaining slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0061] 60% urea, 10% potassium chloride, 5% tamarind polysaccharide gum, 10% acetate tamarind polysaccharide gum with a substitution degree of 2.0, 15% tamarind polysaccharide gum coupled with vinyl silane, and 0.5% apatite.

[0062] The preparation method steps are as follows:

[0063] (1) Refining 0.5% of apatite into 500-1000 meshes for use;

[0064] (2), 60% urea, 10% potassium chloride, 5% tamarind polysaccharide gum, 10% acetate tamarind polysaccharide gum with a substitution degree of 2.0, 15% tamarind polysaccharide gum coupled with vinyl silane, 0.5% Apatite is pre-mixed in a stirred reactor, the stirring speed is 20r / min~50r / min, and the stirring time is 2h~3h, so that urea, potassium chloride, tamarind polysaccharide gum, acetate tamarind polysaccharide gum, Tamarind polysaccharide gum coupled with vinyl silane is evenly mixed;

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Abstract

The invention provides a water-retaining slow-soluble fertilizer and a preparation method thereof. The water-retaining slow-soluble fertilizer provided by the invention is composed of nutritional ingredients, a natural polymer with a water retention function and slow solubility and a modifier thereof. Further, the invention provides a preparation method of the water-retaining slow-soluble fertilizer. The method includes: mixing the nutritional ingredients, the natural polymer tamarind polysaccharide gum and the modifier thereof, and apatite by fusion, roller extrusion granulating, and drying and cooling to obtain a water-retaining slow-soluble fertilizer. The water-retaining slow-soluble fertilizer adopts a slow-soluble material with water-retaining property, thereby both being capable of keeping the moisture in soil to ensure sufficient moisture of a plant to promote the plant growth, and capable of being dissolved slowly to slowly release the nutritional ingredients so as to uniformly and stably release the fertilizer efficiency in the plant growth process. The water-retaining slow-soluble fertilizer is high in production efficiency, low in cost, easy to control the process and stable in controlled release, and can be compatible with crop growth rules to improve the utilization rate of the fertilizer.

Description

technical field [0001] The invention belongs to the field of crop fertilizers, and more precisely relates to a water-retaining slow-dissolving fertilizer. Background technique [0002] With the continuous increase of our country's population, the demand for food is also increasing, and it is more and more important to vigorously develop modern agriculture. Chemical fertilizers are playing an increasingly important role in agriculture, but the current chemical fertilizers mainly have two major problems in the use of large amounts of fertilizers, low utilization rates, and pollution to the soil. The most important thing is that my country lacks water resources, and agriculture needs a lot of water. The lack of water in dry season is one of the important factors hindering the development of my country's agriculture. In this way, solving the problems of fertilizer utilization rate, soil pollution and saving agricultural water has become an important object of research on fertil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 陈庆张芝媛
Owner 辽宁营港锌硼酸科技开发有限公司
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