Poly(polyphenol) coated nitrification inhibitor as well as preparation method and application thereof

A technology of nitrification inhibitors and polyphenols, which is applied in the fields of application, agricultural gas emission reduction, fertilizer mixture, etc., can solve the problems of nitrification inhibitors being easily washed out, deliquescence, reducing the inhibition of nitrification, etc., and achieves a small anti-nitrification effect , good pH responsiveness, and obvious slow-release effect

Inactive Publication Date: 2018-05-11
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain defects in nitrification inhibitors DMPP and DCD, which are widely studied and applied at home and abroad, and their effects in use are greatly affected by the environment (degradation rate of nitrification inhibitors, soil temperature and humidity, etc.), especially in my country. In the southern region, due to the humid environment, most nitrification inhibitors are easily leached and deliquescent, which greatly reduces the ability to inhibit nitrification

Method used

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  • Poly(polyphenol) coated nitrification inhibitor as well as preparation method and application thereof
  • Poly(polyphenol) coated nitrification inhibitor as well as preparation method and application thereof
  • Poly(polyphenol) coated nitrification inhibitor as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Utilizing the low solubility of nitration inhibitor DMPP in organic solvents, first DMPP (6g) was dispersed in a container equipped with absolute ethanol solution (500ml), then dopamine (0.5g) was completely dissolved in this solution, and three Ethylamine (15ml) was reacted under vigorous stirring (48h), and the product was simply settled or centrifuged, and dried completely at room temperature or in an oven to obtain polydopamine-coated DMPP, which was recorded as coating synergist sample 1.

[0033] The TEM characterization results of the prepared samples are as follows: figure 1 shown by figure 1 It can be seen that polydopamine was successfully coated on the surface of DMPP.

Embodiment 2

[0035] In this embodiment, 6 g of DMPP, 0.5 g of dopamine, 2.8 g of octadecylamine, and 5 ml of piperidine are used. The raw materials are simultaneously added to 500 ml of ethanol solution and reacted for 48 hours. After drying completely, polydopamine-coated DMPP was obtained, which was recorded as coating synergist sample 2.

Embodiment 3

[0037] Utilize the low solubility of nitrification inhibitor DMPP in organic solvents, at first DMPP (200g) is put into coating instrument fluidized bed coater, dopamine ethanol solution (15mg / ml) and triethylamine ethanol solution (20mg / ml) ml) The organic amine solution is connected by a two-way connection and sprayed on the surface of DMPP at the same time. The spraying of the two solutions is a cycle. This method requires multiple sprays to achieve the thickness of the layer. The solution is 20ml each time, and the number of cycles for 10 times. After spraying, take out the sample and dry it completely at room temperature or in an oven to obtain polydopamine-coated DMPP.

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Abstract

The invention relates to a fertilizer synergist, and in particular relates to a poly(polyphenol) coated nitrification inhibitor as well as a preparation method and application thereof. The poly(polyphenol) coated nitrification inhibitor comprises a nitrification inhibitor and poly(polyphenol) coating the nitrification inhibitor. The preparation method is that a polyphenol compound is subjected toa polymerization reaction on the surface of the nitrification inhibitor. The poly(polyphenol) coating material is resistant to water washing, has good pH responsiveness, is biodegradable, and has lessinfluence on the denitrification effect of the nitrification inhibitor. The coated structure enables the nitrification inhibitor to be resistant to water washing and deliquescence, and have a bettereffect on inhibition of the nitrification effect of nitrogen fertilizers. In addition, the coated structure enables the slow release effect of the nitrification inhibitor to be obvious.

Description

technical field [0001] The invention relates to a fertilizer synergist, in particular to a polyphenol-coated nitrification inhibitor and its preparation method and application. Background technique [0002] With the growth of population, people's demand for food is more urgent, the demand and application amount of nitrogen fertilizer are increasing, but the actual utilization rate of nitrogen fertilizer is decreasing, and the environmental problems caused by nitrogen fertilizer application have attracted much attention. After nitrogen fertilizer is applied to the soil, it will be seriously lost or fixed, and a large amount of nitrogen leaves the soil, which is prone to volatilization, leaching and runoff, causing soil compaction, air and water pollution, and seriously endangering the natural environment. Environmental problems caused by the application of nitrogen fertilizers are even one of the causes of smog. Therefore, reducing chemical fertilizer input and improving nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
CPCC05G3/90Y02P60/21
Inventor 贾鑫王小霖郭鹤龄李勰刘兴欢王荣杰李翠华
Owner SHIHEZI UNIVERSITY
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