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Preparation method for slow-release fertilizer type degradable mulching film

A technology for degrading mulch and chemical fertilizers, applied in fertilization devices, fertilizer mixtures, climate change adaptation, etc., can solve environmental pollution and other problems, and achieve the effect of perfect combination, good mechanical strength, and uniform dispersion

Inactive Publication Date: 2014-04-23
XINJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to organically combine slow-release chemical fertilizers and degradable mulch films, slowly release chemical fertilizer components while the mulch films are naturally degraded, provide long-term stable nutrients for crops, and at the same time maximize the use of active components of chemical fertilizers, thereby solving the problem of chemical fertilizers and mulch films. Environmental pollution problems caused by use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0011] Example 1: Preparation of urea-composite degradable plastic film.

[0012] According to the mass ratio, 60 parts of potato starch and 20 parts of plasticizer were blended and dissolved in 90 degree water and stirred for 30 minutes to obtain solution a; according to the mass ratio, 40 parts of polyvinyl alcohol were stirred and dissolved in 90 degree water and stirred for 30 minutes to obtain solution b. ; Mix solutions a and b and keep stirring at 90 degrees for 30 minutes, then add 10 parts of cross-linking agent, and cross-link at 90 degrees for 30 minutes to obtain a degradable mulch film mother solution. When the temperature of the mother liquor of the degradable plastic film is lowered to less than 60 degrees, 20 parts of urea is stirred and dissolved in the mother liquor, and then cast into a film to prepare a urea-composite biodegradable plastic film.

[0013] Example 2: Preparation of diammonium hydrogen phosphate composite degradable plastic film.

[0014] 60 ...

Embodiment 4

[0017] Example 4: Preparation of ammonium nitrate composite degradable plastic film.

[0018] 60 parts of potato starch and 20 parts of plasticizer were blended and dissolved in 90 degree water and stirred for 30 minutes according to mass proportion to obtain solution a; 40 parts of polyvinyl alcohol were stirred and dissolved in 90 degree water and stirred for 30 minutes according to mass proportion to obtain solution b; Mix solutions a and b and keep stirring at 90°C for 30 minutes, then add 10 parts of crosslinking agent, and react at 90°C for 30 minutes to obtain a degradable mulch film mother solution. When the temperature of the degradable mulching film mother liquid is lowered to less than 60 degrees, 15 parts of ammonium nitrate is stirred and dissolved in the mother liquid, and then cast into a film to prepare a urea-composite degradable mulching film.

Embodiment 5

[0019] Example 5: Preparation of diammonium hydrogen phosphate, dipotassium hydrogen phosphate, and potassium nitrate multi-component degradable plastic film.

[0020] 60 parts of potato starch in proportion by mass, 20 parts of plasticizer, 3 parts of diammonium hydrogen phosphate, 3 parts of dipotassium hydrogen phosphate, and 3 parts of potassium nitrate were blended and dissolved in 90 degrees of water and stirred for 30 minutes to obtain solution a; Stir and dissolve 40 parts of proportional fraction polyvinyl alcohol in water at 90 degrees and stir for 30 minutes to obtain solution b; mix solutions a and b and keep stirring at 90 degrees for 30 minutes, then adjust the pH value to weak alkaline and add 10 parts of crosslinking agent, 90 degrees The cross-linking reaction was carried out for 30 minutes to obtain a degradable mulch film mother liquor, which was then cast into a film or extruded into a film to prepare a multi-component composite degradable mulch film.

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PUM

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Abstract

The invention provides a method for preparing a slow-release fertilizer type degradable mulching film by combining a slow-release fertilizer with a degradable mulching film. The invention relates to the crossing field of slow-release fertilizers and degradable plastic, wherein fertilizer ingredients are slowly released during the natural degradation process of the degradable mulching film by organically combining the fertilizer with the degradable mulching film, and then an environmental pollution problem due to overfertilization and mulching film use are solved simultaneously. The method is characterized in that one or more of the fertilizer ingredients such as nitrogen fertilizer, phosphate fertilizer and potash fertilizer are dissolved or dispersed in degradable mulching film mother solution in a certain ratio during the preparation process, and then the slow-release fertilizer type degradable mulching film is prepared by casting film forming or extrusion film forming. The method provided by the invention provides the added contents of different fertilizer ingredients, conditions and main basis, realizes uniform film forming, keeps plasticity and mechanical strength to a certain extent, can be used for agricultural mulching film materials, and has a good practical value and promotional significance.

Description

technical field [0001] The invention relates to the intersection field of slow-release chemical fertilizers and degradable plastics. By organically combining chemical fertilizers with degradable plastic films, the components of chemical fertilizers are slowly released during the natural degradation of degradable plastic films, thereby simultaneously solving the environmental problems caused by excessive fertilization and use of plastic films. pollution problem. Background technique [0002] Chemical fertilizers and mulch films are the main guarantees and means for increasing production in modern agricultural production, and they are also two types of agricultural production materials that have been invested heavily in agricultural production. However, the use of chemical fertilizers and mulch films has also brought serious environmental pollution problems. [0003] The use of chemical fertilizers provides the nutrients needed for the growth of crops. However, the utilization...

Claims

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Application Information

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IPC IPC(8): A01G13/02C05G3/00C05G3/08C05G3/90
CPCY02A40/28
Inventor 王帅高素云马晓雯
Owner XINJIANG NORMAL UNIVERSITY
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