Slow release fertilizer production technology and using method of slow release fertilizer

A production technology and biomass technology, applied in the field of slow-release fertilizer production, can solve the problems of difficult control of reaction conditions, accelerated soil acidification, and many influencing factors, so as to effectively adjust the physical and chemical properties of soil, prevent water loss, and improve nutrient composition Effect

Inactive Publication Date: 2017-02-01
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the coating used in the above-mentioned slow-release technology is a polymer, which is difficult to degrade itself, and will inevitably cause soil pollution if used for a long time; sulfur itself can be used as a fungicide, and a relatively large amount of elemental sulfur applied to the soil will cause bacteria in the soil. impact, it may produce sulfur dioxide and accelerate soil acidification; fertilizer-packed fertilizer-type wrapping materials are mostly inorganic materials and made of organic or binders. Due to too many influencing factors, it is difficult to achieve a satisfactory controlled-release effect; urease inhibitor type in In the production process, it is difficult to control the dosage of inhibitors, which makes the long-term effect less stable than that of coated fertilizers; urea-formaldehyde polymers are slightly soluble in water and need to be gradually degraded under the action of microorganisms, and the reaction conditions of urea-formaldehyde are difficult to control, making urea-formaldehyde polymerization The chain of matter is long or short. In many cases, the proportion of nitrogen provided by the low molecular weight urea-formaldehyde part exceeds the amount needed by the crop in the early stage of crop growth, but the high molecular weight part provides helium too slowly.
Therefore, in some areas, there has been a phenomenon of crop yield reduction due to the application of urea-formaldehyde fertilizer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a biochar substrate, comprising the following steps:

[0023] 1) Crush the corn cob into 100 mesh powder;

[0024] 2) Mix 1g of the above powder with 10ml of 1% ammonium sulfate solution and 15ml of 1% ammonium acetate solution under hydrothermal conditions, in 20ml of buffer solution (4.3mmol / L Na 2 HPO 4 , 1.4mmol / L KH 2 PO 4 ) under protection, carry out hydrothermal reaction at 140°C for 3 hours;

[0025] 3) Wash the developed material three times with water, and take the residue;

[0026] 4) The residue was heated to 350°C at a heating rate of 2.5°C under anaerobic conditions, and calcined at high temperature for 3 hours to obtain -COOH, -SO 3 Biochar with H functional groups;

[0027] 5) Soak 1g of the above biochar in 10ml 3% potassium nitrate solution for 5 hours, filter, and dry at 120°C for 3 hours;

[0028] 6) Soak the above drying material in 10ml 1% ammonium hydrogen phosphate solution for 5 hours, filter, and dry at 120°C for...

Embodiment 2

[0033] A preparation method of a biochar substrate, comprising the following steps:

[0034] 1) Crush wheat straw into 100-mesh powder;

[0035] 2) Mix 1g of the above powder with 10ml of 1.5% ammonium sulfate solution and 15ml of 1.3% ammonium acetate solution under hydrothermal conditions, in 20ml of buffer solution (4.3mmol / L Na 2 HPO 4 , 1.4mmol / L KH 2 PO 4 ) under the protection of 160 ° C for 3 hours of hydrothermal reaction;

[0036] 3) Wash the developed material three times with water, and take the residue;

[0037] 4) The residue was heated to 400°C at a heating rate of 2.5°C under anaerobic conditions, and calcined at a high temperature for 2.5 hours to obtain -COOH, -SO 3 Biochar with H functional groups;

[0038] 5) Soak 1g of the above biochar in 10ml 3% potassium nitrate solution for 5 hours, filter, and dry at 120°C for 3 hours;

[0039] 6) Soak the above drying material in 10ml 1% ammonium hydrogen phosphate solution for 5 hours, filter, and dry at 120°...

Embodiment 3

[0044] A preparation method of a biochar substrate, comprising the following steps:

[0045] 1) Crush landscaping waste into 100-mesh powder;

[0046] 2) Mix 1g of the above powder with 10ml of 2% ammonium sulfate solution and 15ml of 1.5% ammonium acetate solution under hydrothermal conditions, in 20ml of buffer solution (4.3mmol / L Na 2 HPO 4 , 1.4mmol / L KH 2 PO 4 ) under the protection of 160 ° C for 3 hours of hydrothermal reaction;

[0047] 3) Wash the developed material three times with water, and take the residue;

[0048]4) The residue was heated to 300°C at a heating rate of 2.5°C under anaerobic conditions, and calcined at high temperature for 3 hours to obtain -COOH, -SO 3 Biochar with H functional groups;

[0049] 5) Soak 1g of the above biochar in 10ml 3% potassium nitrate solution for 5 hours, filter, and dry at 120°C for 3 hours;

[0050] 6) Soak the above drying material in 10ml 1% ammonium hydrogen phosphate solution for 5 hours, filter, and dry at 120°C...

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PUM

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Abstract

Currently, continuous reduction of soil fertility and serious salinization are caused by using a great deal of chemical fertilizer, meanwhile, necessary nutrient components in soil flow away along with water in the irrigation process when organic fertilizer is used to cause nutrition shortage, and consequently plant and crop growth is affected seriously. The invention discloses a slow release fertilizer production technology and a using method of slow release fertilizer, wherein the slow release fertilizer takes charcoal synthesized by biomass solid waste as the raw material and has the function of enriching nutrient elements, the method can be used for effectively adjusting the pH value of soil and improving the salinization current situation, soil fertility is improved, the application amount of chemical fertilizer is substantially reduced to conserve cultivated land, and sustainable utilization of cultivated land is achieved.

Description

technical field [0001] The invention relates to a slow-release fertilizer production technology, in particular to a slow-release fertilizer production technology and an application method thereof. Background technique [0002] Internationally, the development of slow-release fertilizers began in the 1950s, and China began to study slow-release fertilizers in the 1970s. After 2000, it was a stage of rapid development of slow-release fertilizers, and the enthusiasm of fertilizer companies increased. Inhibitor stability fertilizers and other bulk slow-release fertilizer products have been researched one after another, and a certain scale of industrialization has been preliminarily realized. Others, such as non-resin-coated slow-release fertilizers with Chinese characteristics, are also being researched and developed. By 2009, the national production capacity of slow-release fertilizers has reached nearly 2.5 million tons, with an output of 700,000 tons, including 50,000 tons ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05D9/00C05G3/80
CPCC05B7/00C05D9/00C05G3/00C05G3/80C05C5/02C05F11/08
Inventor 李维尊鞠美庭
Owner NANKAI UNIV
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