A nano-cadmium passivator for tobacco planting soil and its preparation method and application

A passivating agent and soil technology, applied in the direction of chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problems of not obvious reduction of cadmium content in tobacco, insufficient reduction of effective cadmium content, etc., to maintain microscopic appearance, improve band Charge ability, gentle effect of dehydration process

Inactive Publication Date: 2021-02-02
HUNAN AGRICULTURAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a nano-cadmium passivator for tobacco planting soil and its preparation method and application, to improve and solve the problems of insufficient reduction of effective cadmium content in soil and insignificant reduction of cadmium content in tobacco

Method used

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  • A nano-cadmium passivator for tobacco planting soil and its preparation method and application
  • A nano-cadmium passivator for tobacco planting soil and its preparation method and application
  • A nano-cadmium passivator for tobacco planting soil and its preparation method and application

Examples

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Embodiment 1

[0032] A nano-cadmium passivator for tobacco planting soil, which is obtained by fermenting a mixed solution composed of Bacillus subtilis suspension, tobacco stalks, biomass charcoal, nano-hydroxyapatite, and agar powder, and then filtering and carbonizing at high temperature; The concentration of the bacterial suspension of Bacillus subtilis is 10 5 -10 6 cfu / mL; the weight ratio of the tobacco stalk, biochar, nano-hydroxyapatite, and agar powder is 6:3:3:1.5; the ratio of the bacterial suspension of Bacillus subtilis to the tobacco stalk For 7.5mL: 1g.

[0033] A preparation method according to the above-mentioned nano-cadmium passivator for tobacco planting soil, comprising the following steps: (1) get tobacco stalks, biomass charcoal, nano-hydroxyapatite, agar powder, heat and dissolve after adding water, and cool to 37 After ℃, the gel state solution is formed; (2) the gel state solution is smashed and stirred at a speed of 300 rpm by a mechanical stirring device. Afte...

Embodiment 2

[0036] A nano-cadmium passivator for tobacco planting soil, which is obtained by fermenting a mixed solution composed of Bacillus subtilis suspension, tobacco stalks, biomass charcoal, nano-hydroxyapatite, and agar powder, and then filtering and carbonizing at high temperature; The concentration of the bacterial suspension of Bacillus subtilis is 10 5 -10 6 cfu / mL; the weight ratio of the tobacco stalk, biochar, nano-hydroxyapatite, and agar powder is 4:4:2:2; the ratio of the bacterial suspension of Bacillus subtilis to the tobacco stalk For 10mL: 1g.

[0037] A preparation method according to the above-mentioned nano-cadmium passivator for tobacco planting soil, comprising the following steps: (1) get tobacco stalks, biomass charcoal, nano-hydroxyapatite, agar powder, heat and dissolve after adding water, and cool to 37 After ℃, the gel state solution is formed; (2) The gel state solution is smashed and stirred at a speed of 200 rpm by a mechanical stirring device. After a...

Embodiment 3

[0040] A nano-cadmium passivator for tobacco planting soil, which is obtained by fermenting a mixed solution composed of Bacillus subtilis suspension, tobacco stalks, biomass charcoal, nano-hydroxyapatite, and agar powder, and then filtering and carbonizing at high temperature; The concentration of the bacterial suspension of Bacillus subtilis is 10 5 -10 6 cfu / mL; the weight ratio of the tobacco stalk, biochar, nano-hydroxyapatite, and agar powder is 8:2:4:1; the ratio of the bacterial suspension of Bacillus subtilis to the tobacco stalk For 5mL: 1g.

[0041] A preparation method according to the above-mentioned nano-cadmium passivator for tobacco planting soil, comprising the following steps: (1) get tobacco stalks, biomass charcoal, nano-hydroxyapatite, agar powder, heat and dissolve after adding water, and cool to 37 After ℃, the gel state solution is formed; (2) the gel state solution is smashed and stirred at a speed of 400 rpm by a mechanical stirring device. After ad...

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Abstract

The invention discloses a tobacco growing soil nano-cadmium passivator and a preparation method and application thereof, and belongs to the field of environmental protection. The tobacco growing soilnano-cadmium passivator is prepared through filtration and high-temperature carbonization after fermentation of a mixed solution composed of bacillus subtilis bacterial suspension, tobacco stalks, biomass charcoal, nano-hydroxyapatite and agar powder is conducted; the concentration of the bacillus subtilis bacterial suspension of is 10<5>-10<6> cfu/ml; the weight ratio of the tobacco stalks, the biomass charcoal, the nano-hydroxyapatite, and the agra powder is (4 to 8):(2 to 4):(2 to 4):(1 to 2); and the ratio of the bacillus subtilis bacterial suspension to the tobacco stalks is 5-10 ml:1 g.The cadmium passivator can effectively control the content of effective cadmium in tobacco growing soil and cadmium in tobacco.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a nano-cadmium passivator for tobacco planting soil, a preparation method and application thereof. Background technique [0002] my country's tobacco planting area and output rank first in the world, with an annual output of more than 4.5 million tons of tobacco leaves, and a corresponding output of more than 4.5 million tons of tobacco rods (1:1). Tobacco stems are not suitable for burning, and are not easy to rot and return to the field as fertilizer. A large number of tobacco stems are discarded or burned, which seriously wastes resources and pollutes the atmospheric environment. The research results show that the application of tobacco straw bio-organic fertilizer in tobacco fields can reduce soil bulk density, increase soil air permeability, increase soil natural water content and field water holding capacity, and with the increase of tobacco straw bio-org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/00C09K101/00
CPCC09K17/00C09K2101/00
Inventor 丁春霞曾维爱赵阿娟姚茗淞蔡海林段美珍谢鹏飞翟争光杨远刘德明苏嘉颖戴杏华
Owner HUNAN AGRICULTURAL UNIV
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