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Ground mass controlled release fertilizer

A controlled-release fertilizer and controlled-release material technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of poor application, secondary pollution, high cost, etc., achieve good curing effect, improve nutrient utilization, low cost effect

Active Publication Date: 2011-04-20
沈阳中科新型肥料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problems of high cost, secondary pollution and inability to be well applied to agricultural production in existing coated fertilizers, and provides a low processing cost, long-acting and nutrient release that meets crop growth requirements. A new type of controlled-release fertilizer that is coordinated, controlled-release materials have no secondary cumulative pollution, and is easy to process and manufacture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 2.4kg of polyvinyl alcohol, add 70kg of water, dissolve into a controlled release agent at 100°C; mix 0.27kg of sodium polyacrylate and 0.27kg of calcium hydroxide with 10kg of water to make a liquid curing agent, mix the two liquids to make a controlled release Material. 227kg of nutrient elements such as monoammonium phosphate, 380kg of urea, 167kg of potassium chloride, 100kg of humic acid, and 126kg of bentonite were crushed and mixed separately and then granulated. During granulation, 80kg of the above-mentioned controlled-release materials were added, and dried after granulation. Substrate controlled release fertilizer.

Embodiment 2

[0023] Nitrogen-potassium matrix controlled-release fertilizer: 2.0kg of polyvinyl alcohol, 0.3kg of sodium polyacrylate, 0.3kg of calcium hydroxide, and 90kg of water to make a controlled-release material. Take urea 200kg, ammonium nitrate phosphate fertilizer 318kg, potassium chloride 167kg, humic acid 150kg; bentonite 80kg, zeolite powder 85kg, mix after pulverizing respectively, and granulate in granulation equipment, add controlled release material in granulation process , dry after granulation.

Embodiment 3

[0025] Special fertilizer for palm: 3.0kg of polyvinyl alcohol, 0.35kg of sodium polyacrylate, and 90kg of water are dissolved at 100°C to make a controlled release agent. Take 198kg of urea, 326kg of diammonium hydrogen phosphate, and 250kg of potassium chloride, grind them separately, mix them with 120kg of humic acid, and 106kg of bentonite to make granules, add controlled-release materials during the granulation process, and dry them to become finished fertilizers. The fertilizer is a 15:15:15 matrix controlled-release fertilizer, with a validity period of 180 days, 100-120 days longer than ordinary fertilizers, and its initial dissolution rate is 38.03%, which is 75.48% for ordinary fertilizers, which is 49.6% lower. The differential dissolution rate is 1.03%, which is 11.4% of the 9.01% of common fertilizers.

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PUM

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Abstract

The invention relates to a release control fertilizer, in particular to a substrate release control fertilizer which consists of a release control material, instantly soluble macro-elements of N and P, a K fertilizer and a flocculating agent; the release control material includes a release control agent and a firming agent; water is used as a solvent; wherein, the release control agent is polyvinyl alcohol; the firming agent is sodium polyacrylate and calvital; the weight ratios of the release control agent and each component of the firming agent, namely, the polyvinyl alcohol : the sodium polyacrylate : the calvital : the water are equal to 2.0 to 3.0 : 0.2 to 0.35 : 0.2 to 0.35 : 97.6 to 96.3; the flocculating agent is humic acid and the weight ratio of the humic acid to the fertilizer is 8 to 12 : 92 to 88; the weight percentage content of the release control material and the water in the final product, the substrate release control fertilizer, is 8 to 12 percent. The substrate release control fertilizer has the advantages of low processing cost, long effect, harmony between the nutrient release and the growing demands of crops, no secondary accumulated pollution of the releasecontrol material as well as being easy to be processed and manufactured.

Description

technical field [0001] The present invention relates to a controlled-release fertilizer, specifically a matrix-based controlled-release fertilizer. Its components include a controlled-release agent, a curing agent and a fertilizer for a controlled-release material. Nutrients, including flocculants (coagulants). Background technique [0002] At present, improving the utilization rate of fertilizers has become a research hotspot in the field of fertilizers in various countries. Due to the influence of their own chemical properties, the existing fertilizers have low utilization rates and short fertilizer effect periods. In order to solve this problem well, the world has successively researched and developed slow-release nitrogen fertilizers (urea-formaldehyde), coated fertilizers (controlled-release fertilizers, etc.) and stable fertilizers (fertilizers containing inhibitors) to cover The film fertilizer has the highest utilization rate. However, due to the limitation of coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C08L29/04C08K3/22
Inventor 石元亮尹洪斌
Owner 沈阳中科新型肥料有限公司