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Method for preparing organic selenium fertilizer through hydrolysis of selenium-enriched yeast

A technology of selenium-enriched yeast and organic selenium fertilizer, which is applied in the direction of organic fertilizers, etc., can solve the problems of inconvenient use of organic selenium fertilizer quick-acting fertilizer, high molecular weight cannot be quickly absorbed, and cannot be absorbed by plants, etc., to achieve small molecular weight, reduced toxicity, and convenient fast absorbing effect

Inactive Publication Date: 2014-10-22
姚海斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of its large molecular weight, it cannot be quickly absorbed by plants, so it is inconvenient to use as an organic selenium quick-acting fertilizer, and its process is complicated and its manufacturing cost is relatively high.
[0008] Application number CN102219586 A Mixing organic fertilizer and sodium selenite to produce organic selenium fertilizer, the product contains a large amount of inorganic selenium, which cannot be well absorbed by plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Weigh 5 grams of selenium-rich dry yeast with a selenium content of 2000ppm, put it in a 500ml Erlenmeyer flask with 50ml of purified water in advance, shake it well to make a bacterial suspension, adjust the pH to 2.0 with 30% concentrated hydrochloric acid, and put it in an autoclave In the medium, use steam to heat to 140°C and keep it warm for 6 hours to hydrolyze selenium-enriched yeast into small molecule organic selenium of selenoamino acids and oligopeptides; when the temperature drops to room temperature, adjust the pH to 6.5 with 10% calcium hydroxide aqueous solution -7.2, the small molecule organic selenium fertilizer is obtained.

Embodiment 2

[0059] Weigh 5 grams of selenium-rich dry yeast with a selenium content of 2000ppm, put it in a 500ml Erlenmeyer flask with 50ml of purified water in advance, shake it well to make a bacterial suspension, adjust the pH to 3.0 with 30% concentrated hydrochloric acid, and put it in an autoclave In the medium, use steam to heat to 140°C and keep it warm for 6 hours to hydrolyze selenium-enriched yeast into small molecule organic selenium of selenoamino acids and oligopeptides; when the temperature drops to room temperature, adjust the pH to 6.5 with 10% calcium hydroxide aqueous solution -7.2, the small molecule organic selenium fertilizer is obtained.

Embodiment 3

[0061] Weigh 5 grams of selenium-rich dry yeast with a selenium content of 2000ppm, put it in a 500ml Erlenmeyer flask with 50ml of purified water in advance, shake it well to make a bacterial suspension, adjust the pH to 4.0 with 30% concentrated hydrochloric acid, and put it in an autoclave In the medium, use steam to heat to 140°C and keep it warm for 6 hours to hydrolyze selenium-enriched yeast into small molecule organic selenium of selenoamino acids and oligopeptides; when the temperature drops to room temperature, adjust the pH to 6.5 with 10% calcium hydroxide aqueous solution -7.2, the small molecule organic selenium fertilizer is obtained.

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Abstract

The invention relates to a method for preparing an organic selenium fertilizer through hydrolysis of selenium-enriched yeast. The method comprises the following steps: with selenium-enriched yeast as a raw material, allowing selenium-enriched yeast cells to undergone wall breaking and selenoprotein to undergone hydrolysis under acidic and thermal conditions so as to obtain selenoamino acid and oligopeptides thereof; carrying out cooling to room temperature; and adjusting the pH value of hydrolysate to allow the hydrolysate to be neutral, thereby obtaining the micromolecular organic selenium fertilizer. The method has the advantages of easiness, convenient operation and easy realization of industrial production. The prepared organic selenium fertilizer has the main components--selenoamino acid and oligopeptides thereof, has a small molecular weight and can be easily absorbed by plants. When the micromolecular organic selenium fertilizer is applied to crops, the contents of organic selenium in fruit and seeds are greatly increased, the outputs of the crops are increased, the added values of agricultural products are enhanced, and economic benefits of the crops are improved.

Description

technical field [0001] The invention relates to a method for preparing an organic selenium fertilizer, in particular to a method for preparing an organic selenium fertilizer by hydrolyzing selenium-enriched yeast. Background technique [0002] Selenium is an essential trace element for humans and animals. Selenium deficiency will seriously affect human health. In 1972, Roetueh confirmed that selenium is the active ingredient of glutathione peroxidase (GPX). Since then, selenium has been recognized as an essential trace element for life. [0003] Selenium is an essential nutrient element for the growth of higher plants. According to research, 0.1-1.0 μg / g can promote the growth of rice, increase yield and increase the selenium content in grains. Selenium at 1.0 μg / g could significantly increase the root activity of rice seedlings and the activity of glutathione peroxidase (GPX) at tillering and booting stages, and the selenium content in grains was significantly higher than...

Claims

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Application Information

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IPC IPC(8): C05F11/08
Inventor 姚海斌
Owner 姚海斌
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