Preparation method of full-effect selenium-containing slow-release drug fertilizer

A medicated fertilizer and slow-release technology, applied in nitrogen fertilizer, phosphate fertilizer, fertilization device and other directions, can solve the problems of short duration of medicated fertilizer and fertilizer effect, difficult to absorb crops, and low fertilizer utilization rate, so as to reduce planting cost, save fertilizer and Long-term effects of pesticides, drug efficacy and fertilizer efficacy

Inactive Publication Date: 2015-05-06
LIAONING NANYANG FERTILIZER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, medicinal fertilizers have the problem of short duration of efficacy and fertilizer effects
The drug effect period is generally only 20 days to 30 days, the fertilizer effect period is only 30 days to 50 days, and the crops generally need fertilizer for 90 days to 120 days, so it is necessary to apply pesticides and fertilizers multiple times, and the operation is time-consuming and laborious.
The utilization rat

Method used

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  • Preparation method of full-effect selenium-containing slow-release drug fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1.1. Add 1 kg of carbosulfan, 0.5 kg of sodium selenite and 10 kg of zeolite powder into a granulator, and granulate to obtain a fertilizer base core with a particle size of 30 mesh;

[0017] 1.2. Add 100kg of urea to 180kg of distilled water, add sodium hydroxide solution to adjust the pH to 7.5, add 85kg of formaldehyde, react at 40°C for 50min, add 28kg of ammonium dihydrogen phosphate, adjust the pH to 4 with phosphoric acid, and continue at 40°C React for 30 minutes to obtain urea-formaldehyde complex phosphorus;

[0018] 1.3. Add 10kg of medicinal fertilizer base core into the granulator, and granulate with a mixture of 90kg of urea-formaldehyde compound phosphorus, 0.1kg of lignin, 0.5kg of sodium selenite and 1kg of benthiazil to obtain full-effect selenium-containing Slow release fertilizer.

Embodiment 2

[0020] 1.1. Add 2 kg of carbosulfan, 0.1 kg of sodium selenite and 12 kg of zeolite powder into the granulator, and granulate to obtain a fertilizer base core with a particle size of 30 mesh;

[0021] 1.2. Add 100kg of urea to 150kg of distilled water, add sodium hydroxide solution to adjust the pH to 7.5, add 90kg of formaldehyde, react at 40°C for 60min, add 25kg of ammonium dihydrogen phosphate, adjust the pH to 4 with phosphoric acid, and continue at 40°C React for 40 minutes to obtain urea-formaldehyde complex phosphorus;

[0022] 1.3. Add 20kg of medicinal fertilizer base core into the granulator, and granulate with a mixture of 80kg of urea-formaldehyde compound phosphorus, 0.15kg of lignin, 0.1kg of sodium selenite and 2kg of benthiazil to obtain a full-effect selenium-containing Slow release fertilizer.

Embodiment 3

[0024] 1.1. Add 1.5 kg of carbosulfan, 0.3 kg of sodium selenite and 11 kg of zeolite powder into a granulator, and granulate to obtain a fertilizer base core with a particle size of 30 mesh;

[0025] 1.2. Add 100kg of urea to 160kg of distilled water, add sodium hydroxide solution to adjust the pH to 7.5, add 88kg of formaldehyde, react at 40°C for 55min, add 26kg of ammonium dihydrogen phosphate, adjust the pH to 4 with phosphoric acid, and continue at 40°C React for 35 minutes to obtain urea-formaldehyde complex phosphorus;

[0026] 1.3. Add 15kg of medicinal fertilizer base core into the granulator, and granulate with a mixture of 85kg of urea-formaldehyde compound phosphorus, 0.12kg of lignin, 0.3kg of sodium selenite and 1.5kg of benthiazil to obtain a full-effect containing Selenium slow-release medicinal fertilizer.

[0027] The full-effect selenium-containing slow-release medicinal fertilizer that the embodiment of the present invention 1~embodiment 3 makes is applie...

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Abstract

The invention discloses a preparation method of a full-effect selenium-containing slow-release drug fertilizer. The preparation method comprises the following steps: adding benfuracarb, sodium selenite and zeolite powder into a granulating machine to perform granulation so as to obtain a drug fertilizer basic core; adding urea into distilled water, adding a sodium hydroxide solution to adjust the pH value, adding formaldehyde for reaction, adding ammonium dihydrogen phosphate, adjusting the pH value by using phosphoric acid, and reacting continuously to obtain urea formaldehyde compound phosphorus; and adding the drug fertilizer basic core into the granulating machine, and performing granulation by using a mixture containing urea formaldehyde compound phosphorus, lignin, sodium selenite and benthiavalicarb-isopropyl, thereby obtaining the full-effect selenium-containing slow-release drug fertilizer. The preparation method disclosed by the invention has the advantages that the process is reasonable, an effect of long-acting relief is achieved, the utilization ratios of pesticides and fertilizers can be improved, selenium and a drug fertilizer are organically combined, and inorganic selenium is absorbed and converted by crops and becomes biological organic selenium enriched in agricultural products.

Description

technical field [0001] The invention relates to a preparation method of full-effect selenium-containing medicinal fertilizer. Background technique [0002] In agricultural production, medicinal fertilizers have the function of killing crop diseases and insect pests or regulating crop growth. But medicinal fertilizer has the problem of short duration of drug effect and fertilizer effect. The drug effect period is generally only 20 days to 30 days, the fertilizer effect period is only 30 days to 50 days, and the crops generally need fertilizer for 90 days to 120 days, so it is necessary to apply pesticides and fertilizers multiple times, which is time-consuming and laborious. The utilization rate of pesticides in medicinal fertilizers is only 30% to 40%, and most of them enter the atmosphere and water due to volatilization and wetting, causing environmental pollution and serious waste of medicinal fertilizers; the utilization rate of fertilizers is also very low, such as ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/02C05G3/60
CPCC05B7/00C05G3/00C05G3/60C05G3/80C05B17/00C05C9/00C05D9/02
Inventor 孟祥光孟薇
Owner LIAONING NANYANG FERTILIZER
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