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Tea garden soil fluorine reducing agent and preparation method thereof

A soil and tea garden technology, applied in the field of tea garden soil fluoride reducing agent and its preparation, achieves the effects of reducing the content of fluorine, reducing the activity of fluorine, and reducing the harm of fluorine

Pending Publication Date: 2022-04-26
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of reducing the fluorine content of brick tea is mainly carried out in the process of tea processing, and there is no clear report on the method of reducing the fluorine content of raw materials of brick tea fresh leaves through planting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Composition of raw materials (parts by weight): 10 parts of calcium dihydrogen phosphate, 7 parts of calcium chloride, 5 parts of potassium sulfate, 15 parts of chitosan, and 5 parts of humic acid.

[0025] The preparation method comprises the following steps:

[0026] S1. chitosan is dissolved in 2wt% acetic acid solution, obtains 1.5mg / mL chitosan solution;

[0027] S2. humic acid is formulated into a solution to obtain a 0.5mg / mL humic acid solution;

[0028] S3. Calcium dihydrogen phosphate, calcium chloride, and potassium sulfate are dissolved in water to obtain an active substance solution, and the mass percentage concentration of the total substance is 7wt%;

[0029] S4. Mix the chitosan solution and the humic acid solution, stir evenly at 300r / min, add the active substance solution, continue to stir for 10min, add genipin, the addition amount is 1wt% of the system quality, and continue to stir until the system becomes a gel The tea garden soil defluoridation a...

Embodiment 2

[0031] Composition of raw materials (parts by weight): 20 parts of sodium monohydrogen phosphate, 12 parts of calcium sulfate, 10 parts of potassium sulfate, 20 parts of chitosan, and 12 parts of humic acid.

[0032] The preparation method comprises the following steps:

[0033] S1. chitosan is dissolved in 5wt% acetic acid solution, obtains 3mg / mL chitosan solution;

[0034] S2. humic acid is formulated into a solution to obtain a 2mg / mL humic acid solution;

[0035] S3. Sodium monohydrogen phosphate, calcium sulfate, and potassium sulfate are dissolved in water to obtain an active substance solution, and the mass percentage concentration of the total substance is 15wt%;

[0036] S4. Mix the chitosan solution and the humic acid solution, stir evenly at 500r / min, add the active substance solution, continue to stir for 20min, add genipin, the addition amount is 2wt% of the system mass, continue to stir until the system becomes a gel The tea garden soil defluoridation agent wa...

Embodiment 3

[0038] Composition of raw materials (parts by weight): 15 parts of sodium dihydrogen phosphate, 10 parts of calcium nitrate, 7 parts of potassium sulfate, 17 parts of chitosan, and 7 parts of humic acid.

[0039] The preparation method comprises the following steps:

[0040] S1. chitosan is dissolved in 3.5wt% acetic acid solution, obtains 2mg / mL chitosan solution;

[0041] S2. humic acid is mixed with solution, obtains 1.5mg / mL humic acid solution;

[0042] S3. Sodium dihydrogen phosphate, calcium nitrate, and potassium sulfate are dissolved in water to obtain an active substance solution, and the mass percentage concentration of the total substance is 12wt%;

[0043] S4. Mix the chitosan solution and the humic acid solution, stir evenly at 400r / min, add the active substance solution, continue to stir for 15min, add genipin, the addition amount is 1.5wt% of the system quality, continue to stir until the system is coagulated Colloidal, add sodium carbonate solution dropwise ...

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Abstract

The invention provides a tea garden soil fluorine reducing agent and a preparation method thereof, and belongs to the technical field of soil conditioners. The fertilizer is prepared from the following raw materials in parts by weight: 10-20 parts of phosphate fertilizer, 7-12 parts of calcium salt, 5-10 parts of potassium sulfate, 15-20 parts of chitosan and 5-12 parts of humic acid. According to the tea garden soil fluorine reducing agent, groups such as-OH and-NH-contained in chitosan molecules interact with-COOH of humic acid, a cage-shaped structure with a large containing capacity is formed under cross-linking of genipin, the adsorption and coating effects on active substances including phosphate fertilizer, calcium salt and potassium sulfate can be remarkably improved, the immobilization amount of the active substances is increased, and the adsorption efficiency of the tea garden soil fluorine reducing agent is improved. After the prepared tea garden soil fluorine reducing agent is added into soil, the slow release effect can be achieved, and therefore the long-acting fluorine reducing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of soil improvers, in particular to a tea garden soil defluoridation agent and a preparation method thereof. Background technique [0002] Fluorine is widely distributed in nature and is one of the essential trace elements for the human body. It plays an important role in human growth and bone metabolism. Adequate intake of fluorine is beneficial to health. However, excessive intake of fluorine can lead to fluorosis, mainly Manifested as dental fluorosis and skeletal fluorosis. Tea tree is a typical polyfluoride plant. The fluorine content in tea leaves is 1-2 orders of magnitude higher than that in ordinary plants. Among all kinds of tea, brick tea has the highest fluorine content. At present, the method of reducing the fluorine content of brick tea is mainly carried out in the process of tea processing, and there is no clear report on the method of reducing the fluorine content of raw materials of brick t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05G3/00C05G3/40
CPCC05B1/04C05B7/00C05G3/00C05G3/40C05G3/80C05D1/02C05D3/00C05F11/00C05F11/02C05C5/04
Inventor 李春雷徐红梅李培之刘杰
Owner WEIFANG UNIV OF SCI & TECH
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