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Preparation method of special carbon-based selenium-rich fertilizer for rice

A selenium-enriched, carbon-based technology, applied in the field of fertilizers, can solve the problems of large residual inorganic selenium, uneven distribution, and difficulty in absorption, and achieve the effects of improving bioavailability, strong soil reducibility, and improving air permeability.

Inactive Publication Date: 2020-10-30
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Natural selenium-enriched rice comes from natural high-selenium areas in my country, and most of the selenium-enriched rice currently on the market is obtained by spraying selenate or selenite on the leaves, but the content of organic selenium in its autolyzed matter is not high. High, low biological activity, difficult to absorb by the human body, and large toxic and side effects
The advantage of spraying selenium fertilizer on the leaves is that the selenium content increases rapidly, but the residual amount of inorganic selenium is large, and the distribution is uneven. If some research finds that the rice obtained by spraying selenium fertilizer on the leaves is only rich in selenium in the chaff, and no selenium is found in rice. Significant increase in selenium content

Method used

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  • Preparation method of special carbon-based selenium-rich fertilizer for rice

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of carbon-based selenium-enriched fertilizer special for rice, the specific steps are as follows:

[0029] (1) Planting selenium-enriched plant material

[0030] Plant pakchoi with selenium-enriched plant materials. After 30 days of seedling growth, spray 20 L / mu of sodium selenite solution with a concentration of 150 mg / kg, spray once every 7 days, and spray 3 times continuously. Two pakchoi grow Harvest after a month;

[0031] (2) Collection and concentration of selenium-enriched extract

[0032] The pakchoi harvested in step (1) is pulverized by an ultrafine pulverizer and put into a fermenter; 2‰ of microbial bacterial agents are added per kilogram of fast-growing plants; oxamide is added in an amount of adjusting the carbon-nitrogen ratio of the fermentation material to 30. Directly ventilate with a ventilating pump, the ventilating frequency is 10 minutes each time, the ventilating is continued for 2 minutes, and the ventilating volume is 0....

Embodiment 2

[0040] A preparation method of carbon-based selenium-enriched fertilizer special for rice, the specific steps are as follows:

[0041] (1) Planting selenium-enriched plant material

[0042] Buddleia is planted with selenium-enriched plant materials. After 35 days of seedling growth, spray 30 L / mu of sodium selenite solution with a concentration of 100 mg / kg, spray once every 7 days, and spray 3 times continuously. Buddleia grows Harvest after 5 months;

[0043] (2) Collection and concentration of selenium-enriched extract

[0044] The fast-growing plants harvested in step (1) are pulverized by an ultrafine pulverizer and put into a fermenter; 1.5‰ of microbial bacterial agents are added per kilogram of fast-growing plants; 35. Use the ventilation pump to directly ventilate, the ventilation frequency is 10 minutes each time, the continuous ventilation is 2 minutes, and the ventilation volume is 0.5 (V / V min); carry out fermentation;

[0045]After one month of fermentation, t...

Embodiment 3

[0052] A preparation method of carbon-based selenium-enriched fertilizer special for rice, the specific steps are as follows:

[0053] (1) Planting selenium-enriched plant material

[0054] Plant water celery with selenium-enriched plant materials. After 40 days of seedling growth, spray 25 L / mu of sodium selenite solution with a concentration of 130 mg / kg, spray once every 7 days, spray 3 times continuously, and grow 4 water celery. Harvest after a month;

[0055] (2) Collection and concentration of selenium-enriched extract

[0056] The fast-growing plants harvested in step (1) are pulverized by an ultrafine pulverizer and put into a fermenter; 1‰ of microbial bacterial agents are added per kilogram of fast-growing plants; 32. Use the ventilation pump to directly ventilate, the ventilation frequency is 10 minutes each time, the continuous ventilation is 2 minutes, and the ventilation volume is 0.5 (V / V min); carry out fermentation;

[0057] After one month of fermentation...

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Abstract

The invention discloses a preparation method of a special carbon-based selenium-rich fertilizer for rice, and belongs to the technical field of fertilizers. The preparation method comprises the following steps: planting a selenium-enriched plant material, collecting and concentrating a selenium-enriched extracting solution, preparing modified selenium-enriched biomass charcoal by utilizing three-time slag materials, and preparing the carbon-based selenium-enriched fertilizer. Active organic selenium is generated through plant enrichment and compounded with biomass charcoal, fixation and loss of the active selenium in soil are reduced, and the utilization efficiency of the selenium fertilizer is improved.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a preparation method of a special carbon-based selenium-rich fertilizer for rice. Background technique [0002] About 50% of the world's population relies on rice as a staple food for energy and nutrients. The content of selenium in rice varies in different countries and regions. In major rice producing and consuming countries such as Egypt, China and Thailand, the content of selenium in rice in the market is very low. It is estimated that in countries and regions where rice is the staple food, if the intake of rice is 300g / d, the selenium content of 75% of the rice in the world market is not enough to provide 70% of the recommended selenium intake for the human body, resulting in widespread selenium deficiency . Too low selenium content in food will cause some pathological changes in the human body, such as Keshan disease, Kaschin-Beck disease and more than 40 diseases. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/12C05F17/00C01B32/05
CPCC05G3/00C05G5/12C05D9/00C05F17/00C01B32/05C05F3/00C05F11/00C05G1/00Y02W30/40C05D9/02
Inventor 张义凯陈惠哲张玉屏向镜王亚梁
Owner CHINA NAT RICE RES INST
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