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Slow-release organic fertilizer and preparation method thereof

An organic fertilizer and slow-release technology, applied in the field of slow-release organic fertilizer and its preparation, can solve the problems of easy agglomeration failure and poor efficacy, and achieve the effects of increasing crop yield, promoting high and stable yield, and enhancing the effect of sustained release.

Inactive Publication Date: 2019-10-22
徐悦阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved in the present invention is to provide a slow-release organic fertilizer and a preparation method thereof for the slow-release organic fertilizer, whose particles are easy to agglomerate and fail, and the effect is not good. The particle size of fertilizer particles and the distribution of bioactive agents are uniform, and the synergistic slow-release effect of the two in the soil is obvious, and the efficacy is consistent. It can improve soil quality and crop quality for a long time, and maximize the economic value of crops.

Method used

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Examples

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Embodiment 1

[0031] A preparation method of slow-release organic fertilizer, said preparation method comprising the following steps:

[0032] S1: Stir and mix sodium alginate, organic bentonite, PEG600, sodium citrate and deionized water at a mass ratio of 40:12:5:4:70 at a temperature of 40°C to obtain a mixed solution;

[0033] S2: The mixed solution and organic fertilizer are placed in an autoclave, the amount of organic fertilizer added is equivalent to 8.6% of the total mass of the mixed solution, carbon dioxide is introduced, and the pressure is raised to a supercritical state, and the supercritical The temperature of the state is 38°C and the pressure is 8MPa, and the mixed solution is stirred and mixed evenly under the action of supercritical carbon dioxide to form an organic fertilizer emulsion;

[0034] S3: reduce the outlet operating pressure of the autoclave, and spray the organic fertilizer emulsion obtained in step S2 from the outlet nozzle together with supercritical carbon ...

Embodiment 2

[0039] A preparation method of slow-release organic fertilizer, said preparation method comprising the following steps:

[0040] S1: Stir and mix sodium alginate, organic bentonite, PEG600, sodium citrate and deionized water at a mass ratio of 30:10:3:1:50 at a temperature of 50°C to obtain a mixed solution;

[0041] S2: The mixed solution and organic fertilizer are placed in an autoclave, the amount of the organic fertilizer added is equivalent to 5% of the total mass of the mixed solution, carbon dioxide is introduced, and the pressure is raised to a supercritical state, and the supercritical The temperature in the state is 40°C and the pressure is 8MPa, and the mixed solution is stirred and mixed evenly under the action of supercritical carbon dioxide to form an organic fertilizer emulsion;

[0042] S3: reduce the outlet operating pressure of the autoclave, and spray the organic fertilizer emulsion obtained in step S2 from the outlet nozzle together with supercritical carbon ...

Embodiment 3

[0047] A preparation method of slow-release organic fertilizer, said preparation method comprising the following steps:

[0048] S1: Stir and mix sodium alginate, organic bentonite, PEG600, sodium citrate and deionized water at a mass ratio of 50:15:8:7:100 at a temperature of 60°C to obtain a mixed solution;

[0049] S2: The mixed solution and organic fertilizer are placed in an autoclave, the amount of the organic fertilizer added is equivalent to 10% of the total mass of the mixed solution, carbon dioxide is introduced, and the pressure is raised to a supercritical state, and the supercritical The temperature in the state is 42°C and the pressure is 8.5MPa. Under the action of supercritical carbon dioxide, the mixed solution is stirred and mixed evenly to form an organic fertilizer emulsion;

[0050] S3: reduce the outlet operating pressure of the autoclave, and spray the organic fertilizer emulsion obtained in step S2 from the outlet nozzle together with supercritical carb...

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Abstract

The invention discloses a slow-release organic fertilizer preparation method, which comprises: S1, uniformly mixing sodium alginate, organic bentonite, PEG600, sodium citrate and deionized water to obtain a mixed solution; S2, under the action of supercritical carbon dioxide, mixing uniformly to form an organic fertilizer emulsion; S3, spraying the organic fertilizer emulsion from a spraying nozzle to obtain microcapsule-coated organic fertilizer particles; S4, placing in an ice bath, adding a biological active agent solution, and mixing by using ultrasonic-assisted mechanical stirring to obtain a slow-release organic fertilizer intermediate; and S5, uniformly mixing cellulose, PEG600, ethanol and deionized water to obtain a coating liquid, and spraying the surface of the slow-release organic fertilizer intermediate particles with the coating liquid to obtain the slow-release organic fertilizer. According to the present invention, the particle size distribution of the organic fertilizer particles and the distribution of the biological active agent are uniform, and the organic fertilizer particles and the biological active agent have significant synergistic sustained-release effectso as to improve the soil quality and improve the crop quality.

Description

technical field [0001] The invention relates to the technical field of organic fertilizers, in particular to a slow-release organic fertilizer and a preparation method thereof. Background technique [0002] Those that use organic matter (compounds containing carbon) as fertilizers are called organic fertilizers. The raw materials of organic fertilizers come from a wide range of sources, including industrial waste, agricultural waste, livestock manure, domestic garbage, urban sludge, etc. According to different production methods, they can be divided into compost, retting, biogas fertilizer, waste fertilizer, and natural minerals. Fat and so on. [0003] Organic fertilizers are rich in organic matter and nutrients needed for crop growth. Fully rational use of organic fertilizers can increase crop yields, improve soil fertility, improve the quality of agricultural products, and increase the effectiveness of soil nutrients. However, in the production and use of various organi...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C05F15/00
CPCC05G3/00C05F3/00C05G5/37C05G3/90C05G3/80C05F7/00C05F11/00C05F17/00Y02P20/54
Inventor 徐悦阳
Owner 徐悦阳
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