Environment-friendly coated fertilizer and preparation method thereof

A coating and fertilizer technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of high toxicity, fertilizer nutrient loss, short duration, etc., to achieve good water and moisture retention, improve water absorption, and improve utilization. Effect

Inactive Publication Date: 2012-02-15
SHANDONG XIFENGTIAN ECOLOGY FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the above-mentioned controlled-release fertilizers are: some organic solvents used in production, such as benzene, xylene and halogenated hydrocarbons, are highly toxic, and have even been banned at home and abroad.
Due to the relatively concentrated rainfall in most areas of my country (April-September) and the characteristics of heavy rainfall and short duration, the cultivated crops lack water resources in the dry season (October-March), and the water use efficiency in the rainy season is low. High, severe nutrient loss in fertilizer

Method used

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  • Environment-friendly coated fertilizer and preparation method thereof
  • Environment-friendly coated fertilizer and preparation method thereof
  • Environment-friendly coated fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation of environmentally friendly coated urea fertilizer

[0031] 7 parts of oxidized starch powder passed through a 110-mesh sieve and 3 parts of gelatin powder passed through a 50-mesh sieve were ground (Leitong M02 particle grinder, Shenzhen Leitong Industrial Co., Ltd.) and mixed evenly as a wrapping material. Put 90 parts of urea granules with a diameter of 1-2mm in the disc granulator (Zhengzhou Ruiheng Machinery Manufacturing Co., Ltd., ZL10), spray atomized water to wet the surface of the urea granules, and put the above 10 parts of wrapping materials Put it into the disc granulator for rolling coating, so that it can be wrapped on the fertilizer core. Spray atomized water to wet the surface of urea particles, and finally add 10 parts of superabsorbent resin powder (agricultural superabsorbent resin, NIPPO, Nippon Shokubai) into the disc for rolling coating, so that the superabsorbent resin The powder is wrapped in the outer layer of the fertili...

Embodiment 2

[0032] Example 2 Performance test of water retention and slow release of environmentally friendly coated urea fertilizer (the sample used is obtained in Example 1)

[0033] 2.1. Determination of water absorption (Wa)

[0034]Accurately weigh 1 gram of environmentally friendly coated urea, put it into a beaker with 200mL of tap water, soak it at room temperature for 90 minutes, filter it with a homemade nylon mesh (pore size 0.076mm), let it stand on the mesh for 5 minutes, take it out and weigh it. Denoted as Mi, the water absorption is calculated according to Wa=Mi-1.

[0035] Environmentally friendly coated urea fertilizer samples absorb tap water 81 times under normal pressure, and only superabsorbents wrap urea particles (self-made samples, the preparation method is the same as in Example 1, but without adding oxidized starch and gelatin, directly use superabsorbent resin powder Wrapped urea particles) absorb tap water 73 times.

[0036] 2.2. Determination of sustained r...

Embodiment 3

[0042] Example 3 Preparation of environmentally friendly coated compound fertilizer

[0043] The oxidized starch passed through a 110-mesh sieve and the gelatin passed through a 50-mesh sieve with a mass ratio of 1:1 were ground (Leitong M02 particle grinder, Shenzhen Leitong Industrial Co., Ltd.) and mixed evenly as a wrapping material. Put 92 parts of nitrogen, phosphorus and potassium compound fertilizer particles (provided by Shandong Xitiantian Ecological Fertilizer Co., Ltd.) with a diameter of 1-2mm in the disc granulator (Zhengzhou Ruiheng Machinery Manufacturing Co., Ltd., ZL10), spray into the mist After the surface of the granule is wetted with water, 8 parts of the above-mentioned coating material powder are added into the disc granulator for rolling coating, so that the coating is wrapped on the fertilizer kernel. Spray atomized water again to wet the surface of the particles, and finally add 10 parts of the prepared water-absorbent resin powder (agricultural supe...

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Abstract

The invention discloses an environment-friendly coated fertilizer and a preparation method thereof, and relates to the technical field of sustained/controlled release fertilizers. The environment-friendly coated fertilizer comprises fertilizer particles and a coat coating the surfaces of the fertilizer particles, wherein the controlled release coat is prepared from polyaldehyde oxidized polysaccharide and protein, and in order to protect the controlled release coat, the controlled release coat is coated with super absorbent resin. The environment-friendly coated fertilizer provides required various nutrients for plants, improves the sustained release performance of nutrient elements of the fertilizer, and has multiple functions of water absorbing and retaining, sustained release, soil conditioning and the like by combining the absorbent resin.

Description

[0001] technical field [0002] The invention relates to the technical field of slow and controlled release fertilizers, in particular to an environment-friendly coated fertilizer and a preparation method thereof. Background technique [0003] Fertilizers play an important role in agricultural production. The Food and Agriculture Organization of the United Nations concluded that 40% - 60% of the increase in world food production in the 20th century came from the contribution of fertilizers. World research statistics show that in developed countries, the utilization rate of nitrogen fertilizer is 40%-60%, that of phosphorus fertilizer is 10%-20%, and that of potassium fertilizer is 40%-60%. Research in my country shows that the average utilization rate of nitrogen fertilizer is 30%-40%, that of phosphorus fertilizer is 10%-25%, and that of potassium fertilizer is 35%-60%. On average, 45% of the nitrogen lost in conventional fertilizers applied to the soil is lost through var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 曹郁
Owner SHANDONG XIFENGTIAN ECOLOGY FERTILIZER IND
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