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Photocatalytic foliage fertilization method

A technology of foliar fertilization and photocatalysis, which is applied in the agricultural field to achieve the effect of improving nitrogen utilization rate, simple fertilization method, and strong ammonia production persistence

Active Publication Date: 2020-08-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, there are no patents and literatures to introduce the photocatalytic in-situ ammonia supply system into foliar fertilization. Whether the system can be used as nitrogen fertilizer to provide crops with effectively absorbable and usable nitrogen fertilizer is an important aspect of the photocatalytic ammonia production system in the field of agronomy. The key question of whether it can be promoted and applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Photocatalyst preparation:

[0043] Take 3 parts of HF solution (≥40wt%) and add it dropwise to 25 parts of tetrabutyl titanate, stir and mix for 1 hour, seal the solution and move it into an oven, and keep it at 180°C for 24 hours. After cooling, filter and dry at 60°C to obtain TiO 2 .

[0044] Take 1 part TiO 2 The catalyst is ultrasonically dispersed in 100 parts of water, 0.1 part of urea is added, stirred and mixed for 1 hour, the solution is sealed and moved into an oven, and kept at 120°C for 12 hours. After cooling, filter and dry at 60°C to obtain photocatalyst N / TiO 2 .

[0045] Preparation of ammonia solution and glycerol solution:

[0046] Quantitative glycerol was weighed and dissolved in water to prepare a glycerol solution, wherein the volume ratio of glycerol was 5%. Weigh quantitative N / TiO 2 The catalyst is dissolved in glycerol solution to prepare an ammonia supply solution, wherein the concentration of the catalyst is 250mg / L.

[0047] Deter...

Embodiment 2

[0052] Photocatalyst preparation:

[0053] Take 3 parts of HF solution (≥40wt%) and add it dropwise to 25 parts of tetrabutyl titanate, stir and mix for 1 hour, seal the solution and move it into an oven, and keep it at 180°C for 24 hours. After cooling, filter and dry at 60°C to obtain TiO 2 .

[0054] Take 1 part TiO 2 Catalyst, ultrasonically dispersed in 100 parts of water, adding 0.4 parts of FeCl 2 , Stir and mix for 1h, seal the solution and move it into an oven, and keep it at 100°C for 12h. After cooling, filter and dry at 60°C to obtain photocatalyst Fe / TiO 2 .

[0055] Preparation of ammonia solution and butanetriol solution:

[0056] Quantitative butanetriol was weighed and dissolved in water to prepare a butanetriol solution, wherein the volume ratio of butanetriol was 5%. Weigh quantitative Fe / TiO 2 The catalyst is dissolved in butanetriol solution and prepared as an ammonia supply solution, wherein the concentration of the catalyst is 500 mg / L.

[0057]...

Embodiment 3

[0062] Catalyst preparation:

[0063] Take 7 parts of zinc acetate nonahydrate and 11 parts of sodium hydroxide, dissolve in 100 parts of water, stir and mix for 1 hour, seal the solution and move it into an oven, and keep it at 100°C for 12 hours. After cooling, filter and dry at 60°C to obtain ZnO.

[0064] Take 0.2 parts of GO and ultrasonically disperse it in 100 parts of water, add 1 part of ZnO catalyst, stir and mix for 1 h, seal the solution and move it into an oven, and keep it at 180 °C for 12 h. After cooling, filter and dry at 60°C to obtain rGO / ZnO.

[0065] Preparation of ammonia solution and ethylene glycol solution:

[0066] Weigh a certain amount of ethylene glycol and dissolve it in water to prepare an ethylene glycol solution, wherein the volume ratio of ethylene glycol is 6%. Quantitative rGO / ZnO catalyst was weighed and dissolved in ethylene glycol solution to prepare ammonia supply solution, wherein the catalyst concentration was 700mg / L.

[0067] Det...

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Abstract

The invention relates to the technical field of agriculture and discloses a photocatalytic foliage fertilization method. An ammonia supply aqueous solution containing a photocatalyst and a hole sacrificial agent polyol is sprayed on crop foliage to supply nitrogenous fertilizer under sunlight irradiation, wherein the photocatalyst is a nano-catalyst responsive to sunlight spectrum, a conduction band position is lower than -0.092 V, the mass concentration of the photocatalyst in the ammonia supply aqueous solution is 100-2,000 mg / L, and the volume of the polyol is 1-20% of that of the ammonia supply aqueous solution. Sunlight is used to drive the photocatalyst to generate photo-induced electrons, the hole sacrificial agent is combined to inhibit photo-induced carrier recombination annihilation, electrons and nitrogen in the air are promoted to produce ammonia in situ on the crop foliage to serve as a nitrogen source which can be absorbed and utilized by crops, additional application ofnitrogen-containing fertilizer is not required, the nitrogen utilization rate is increased, and the fertilization method is simple, safe and convenient.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a photocatalytic foliage fertilization method. Background technique [0002] Nitrogen in human nucleic acid and protein comes from organic nitrogen in plants. Plants obtain nutrients mainly by absorbing nitrogen in the soil through their roots, but nitrogen in the soil is relatively limited and needs to be supplemented by external fertilizers. The traditional method of fertilization is soil fertilization, which has a low utilization rate, and nutrients are easily leached, volatilized or fixed by the soil, which can easily cause environmental problems such as water eutrophication, soil acidification, soil compaction, and greenhouse gas emissions. Foliar fertilization has the advantages of low nutrient concentration, fast absorption, strong pertinence, and high utilization efficiency, and can be used as an auxiliary fertilization method. Therefore, the development of effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
CPCA01C21/005C05C3/00
Inventor 赵伟荣刘昳帆黄秀英姚露露
Owner ZHEJIANG UNIV
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