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Preparation method of selenium-rich controlled-release nitrogen fertilizer

A selenium-enriched and nitrogen-rich fertilizer technology, applied in fertilization devices, fertilizer mixtures, applications, etc., to achieve high effectiveness, increase crop yield and selenium content of products, and increase production costs

Active Publication Date: 2013-01-23
菏泽金正大生态工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report about selenium-enriched controlled-release nitrogen fertilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: the preparation method of selenium-enriched controlled-release nitrogen fertilizer, the steps are as follows:

[0046] (1) Preparation of selenium-containing potassium fulvic acid coated urea

[0047] Get 0.15 kilograms of sodium selenate and dissolve it in 15 kilograms of water, spray this solution on 100 kilograms of potassium fulvic acid, stir evenly while spraying, place it at room temperature for 5 hours, and dry it under 65°C to obtain selenium-containing fulvic acid. Potassium acid, spare;

[0048] Get 10 kilograms of bisphenol A and 1.2 kilograms of triethylenetetramine, and mix the two evenly to obtain a binder;

[0049] Take 100 kg of granular urea with a particle size of 2 to 3 mm and put it into a drum to preheat to 65 ° C, spray 0.4 kg of the prepared binder onto the rotating urea particles, and then spray the prepared selenium yellow Potassium humate 2.0 kg, to obtain selenium-containing potassium fulvic acid coated urea I;

[0050] Take ano...

Embodiment 2

[0055] (1) Preparation of selenium-containing potassium fulvic acid coated urea

[0056] Get 0.17 kilograms of sodium selenate and dissolve it in 17 kilograms of water, spray this solution on 100 kilograms of potassium fulvic acid, stir evenly while spraying, place it at room temperature for 8 hours, and dry it under 65°C to obtain selenium-containing fulvic acid. Potassium acid, spare;

[0057] Get 10 kilograms of bisphenol A and 1.4 kilograms of triethylenetetramine, and mix the two evenly to obtain a binder;

[0058] The preparation of the coated urea I containing potassium fulvic acid selenium, the coated urea II containing potassium fulvic acid selenium and the coated urea III containing potassium fulvic acid selenium are the same as in Example 1.

[0059] (2) Compounding

[0060] According to the mass ratio of 1:2:1, three kinds of coated urea I containing potassium fulvate containing selenium, coated urea II containing potassium fulvic acid II and coated urea III cont...

Embodiment 3

[0062] (1) Preparation of selenium-containing potassium fulvic acid coated urea

[0063] Get 0.20 kilogram of sodium selenate and dissolve it in 20 kilograms of water, spray this solution on 100 kilograms of potassium fulvic acid, stir evenly while spraying, place it at room temperature for 6 hours, and dry it under 65°C to obtain selenium-containing fulvic acid. Potassium acid potassium, for subsequent use; Get 10 kilograms of bisphenol A, 1.3 kilograms of triethylenetetramines, both are mixed uniformly, obtain binding agent;

[0064] The preparation of the coated urea I containing potassium fulvic acid selenium, the coated urea II containing potassium fulvic acid selenium and the coated urea III containing potassium fulvic acid selenium are the same as in Example 1.

[0065] (2) Compounding

[0066] According to the mass ratio of 1:2:2, three kinds of coated urea I containing potassium fulvate containing selenium, coated urea II containing potassium fulvic acid II and coate...

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PUM

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Abstract

The invention provides a preparation method of a selenium-rich controlled-release nitrogen fertilizer, which comprises the following steps: (1) mixing element selenium and potassium fulvate, and spraying and bonding the obtained selenium-containing potassium fulvate on urea particles used as the core fertilizer, thus obtaining three kinds of coated urea having different selenium-containing potassium fulvate coating amounts; and (2) proportionally compounding the three kinds of selenium-containing potassium fulvate coated urea having different coating amounts to meet the nutrient requirements of different crops. According to the selenium-rich controlled-release nitrogen fertilizer, the application of a selenium fertilizer and the production of a controlled-release nitrogen fertilizer are combined, and the selenium nutrient is supplemented without changing the coating process; and the fertilizer has a high nutrient utilization rate, and the yield of crops and the selenium content of agricultural products are obviously improved.

Description

technical field [0001] The invention relates to a selenium-rich nitrogen fertilizer with controlled nutrient release and a preparation method thereof, belonging to the technical field of production and application of controlled-release fertilizers. Background technique [0002] Selenium is an essential nutrient element for human beings. It has various functions such as anti-aging, anti-oxidation, and enhancing immunity. Selenium deficiency can easily cause many human diseases. my country is internationally recognized as a major selenium-deficient country. More than 70% of the soil in the region is in a state of selenium deficiency or low selenium, and selenium deficiency is common in the population. Organicizing selenium through crop production and increasing the selenium content of agricultural products are effective measures to solve the insufficient intake of selenium in the dietary structure of residents in selenium-deficient areas, and are also the fundamental way to r...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 解玉洪马钦波吴青伟
Owner 菏泽金正大生态工程有限公司