Nano controlled-release fertilizer and preparation method therefor

A controlled-release fertilizer and nanotechnology, applied in fertilization methods, nitrogen fertilizers, fertilization devices, etc., can solve problems such as being easily washed away by water, prolonging fertilizer efficiency, and immature and stable processing technology of nano-fertilizers. Technological development, the effect of improving absorption and utilization

Inactive Publication Date: 2020-02-04
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of nanocarriers to adsorb, wrap and load traditional fertilizers is an effective way to manufacture new slow-release nanofertilizers, which can effectively protect fertilizers from degradation caused by light, high temperature and microbial infection. The loaded fertilizer can be released slowly, so as to achieve the effect of prolonging the fertilizer effect, but it is difficult to guarantee the fertilizer loading rate by simple adsorption, especially in the pretreatment process, it is easy to be washed away by water
In addition, the processing technology of nano-fertilizers, especially nano-slow and controlled-release fertilizers, is immature and stable, and the mode and mechanism of the controlled release of nano-slow and controlled-release fertilizers in crops are still unclear, which seriously restricts the further development of nano-slow and controlled-release fertilizers. development and widespread use

Method used

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  • Nano controlled-release fertilizer and preparation method therefor
  • Nano controlled-release fertilizer and preparation method therefor
  • Nano controlled-release fertilizer and preparation method therefor

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preparation example Construction

[0064] The second aspect of the present invention provides a method for preparing the above-mentioned nanometer controlled-release fertilizer. The steps include: adsorbing the fertilizer into a sulfhydryl-functionalized nanocarrier through negative pressure to obtain a sulfhydryl-functionalized nanocarrier loaded with fertilizer, and then modifying the sulfhydryl group into a sulfhydryl-functionalized nanocarrier. The surface mesopores and lumen ports of the fertilizer-loaded thiol-functionalized nanocarriers were blocked by the modified polysaccharide with the sulfhydryl group.

[0065] The third aspect of the present invention provides a method for using the above-mentioned nano-controlled-release fertilizer, wherein the nano-controlled-release fertilizer powder is suspended in water and sprayed on the foliage of plants.

Embodiment 1

[0069] Embodiment 1 provides a nanometer controlled-release fertilizer, which is assembled from fertilizer core particles and an outer coating, wherein the fertilizer core particles are sulfhydryl functionalized nanocarriers loaded with fertilizers; the outer coating is modified by a sulfhydryl modifier. polysaccharides.

[0070] The preparation steps of the nanometer controlled-release fertilizer include: adsorbing the fertilizer into the sulfhydryl-functionalized nano-carrier through negative pressure to obtain the sulfhydryl-functionalized nano-carrier of the fertilizer, and then modifying the polysaccharide with a sulfhydryl modifier to affect the sulfhydryl-functionalized nano-carrier of the fertilizer. The surface mesopores and lumen ports of the carrier were blocked.

[0071] The specific preparation steps include:

[0072] Preparation of S1 thiol-functionalized nanocarriers:

[0073] Weigh 2.5 mL of halloysite nanotube powder and disperse it in 100 mL of toluene solu...

Embodiment 2

[0081] Embodiment 2 provides a kind of nanometer controlled-release fertilizer, and its specific implementation is the same as that of embodiment 1, the difference is that the toluene described in S1 is replaced with dehydrated ethanol, and 3-mercaptopropyl triethoxysilane is replaced. Into 3-mercaptopropyl trimethoxysilane.

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Abstract

The invention belongs to the technical field of production of controlled-release fertilizers and more specifically relates to a nano controlled-release fertilizer and a preparation method therefor. The nano controlled-release fertilizer is prepared from fertilizer core particles and external coatings, wherein the fertilizer core particles are mercapto functionalized nano-carriers for loading a fertilizer, and a mass ratio of the mercapto functionalized nano-carriers to the fertilizer is 1: (1 to 10). The nano controlled-release fertilizer provided by the invention is a nano-scale fertilizer and can be used for effectively increasing the absorption utilization ratio of crops to the fertilizer; after the nano-carriers for loading the fertilizer are subjected to functionalization treatment, the nano controlled-release fertilizer can have environment stimulated responsiveness, releases the fertilizer in the nano-carriers in case of stimulation and does not release the fertilizer in case ofno stimulation; and in the presence of glutathione or thioredoxin in crops, the glutathione or thioredoxin acts with disulfide bonds on surfaces of the nano-carriers, thus, the disulfide bonds are broken, and mesopores in surfaces of nanotubes and tube cavity ports are opened to release the fertilizer in tube cavities.

Description

technical field [0001] The invention belongs to the technical field of controlled release fertilizer production, and more particularly, the invention relates to a nanometer controlled release fertilizer and a preparation method thereof. Background technique [0002] Modern agricultural production largely relies on chemical fertilizers and pesticides to provide sufficient nutrients for crop growth, control various pests and diseases, and remove weeds to ensure healthy crop growth. However, the long-term large-scale application of agrochemical products has changed the soil structure, resulting in a significant reduction in the content of organic matter in the soil, resulting in the loss of farmland nutrients and a decline in soil fertility. Excessive application of chemical fertilizers brings many problems, mainly due to the low absorption and utilization rate of traditional agrochemical products by crops themselves. [0003] In recent years, the rapid development of nanotech...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/40C05G5/30A01C21/00
CPCA01C21/00C05C9/00C05G3/00
Inventor 王超李普旺杨子明焦静孔令学何祖宇周闯刘运浩杨艳吕明哲
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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