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Method for using arbuscular mycorrhizal fungi and organic fertilizer to reduce residue of lead and cadmium in tobacco

A technology of arbuscular mycorrhizal fungi and organic fertilizer, which is applied in the fields of promoting tobacco growth and reducing lead and cadmium residues in tobacco, can solve problems such as increasing production cost, complicated process, etc., and achieves increasing phosphorus content, promoting plant growth, and increasing tobacco leaf yield. Effect

Inactive Publication Date: 2012-07-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to reduce the heavy metal residues in tobacco, in addition to reducing the environmental pollution of tobacco planting, lime, calcium magnesium phosphate fertilizer, clay minerals and other inorganic modifiers are commonly used to reduce heavy metal residues in tobacco. The Chinese invention patent (CN101724405A) invented a A soil conditioner for reducing cadmium and lead pollution in crops, using Ca(OH) 2 、Na 2 SiO 7 and other inorganic components are used to reduce the problem of heavy metal residues in tobacco, but there are complex processes, which increase production costs and cannot be better used in the tobacco industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Utilize arbuscular mycorrhizal fungus and organic fertilizer to reduce the method for tobacco lead residue, comprise the following steps:

[0038] Step 1, the preparation of arbuscular mycorrhizal fungal agent

[0039] 1) Take 3 parts of river sand with a particle size of 1mm and 1 part of peat with a particle size of 1mm according to the volume ratio, mix them evenly to form a mixture, and then sterilize the mixture at 121°C for 50 minutes, take it out and cool it to 30°C , to prepare a mixed matrix for subsequent use;

[0040] 2) According to the ratio of 7.8g urea and 33g superphosphate per 100kg of mixed matrix, add urea and superphosphate to the sterilized mixed matrix in step 1), mix well, form base fertilizer, and set aside;

[0041] 3) Take 95-97% of the base fertilizer and 3-5% of the initial arbuscular mycorrhizal fungal agent according to the weight percentage, and mix them evenly to form a culture mixture. Based on the weight of the culture mixture, add 15-...

Embodiment 2

[0051] Utilize arbuscular mycorrhizal fungus and organic fertilizer to reduce the method for tobacco cadmium residue, comprise the following steps:

[0052] Step 1, the preparation of arbuscular mycorrhizal fungal agent

[0053] With the preparation method of step 1 in embodiment 1;

[0054] Step 2, the cultivation of mycorrhized tobacco seedlings

[0055] With the culture method of step 2 among the embodiment 1;

[0056] Step 3: Transplanting and management of mycorrhized tobacco seedlings

[0057] According to the transplanting method of step 3 in Example 1, lead nitrate was replaced by cadmium nitrate to form four kinds of soils with cadmium pollution levels of 0, 1, 10, and 100 mg / kg respectively, representing pollution-free, Slightly polluted, moderately polluted, heavily polluted, respectively apply corresponding calcium nitrate under different cadmium pollution levels, then according to the management method of step 3 in the embodiment 1, obtain the biomass and cadmi...

Embodiment 3

[0063] The method for reducing lead and cadmium residues in tobacco by utilizing arbuscular mycorrhizal fungi and organic fertilizers comprises the following steps:

[0064] Step 1, the preparation of arbuscular mycorrhizal fungal agent

[0065] With step one in embodiment 1;

[0066] Step 2, the cultivation of mycorrhized tobacco seedlings

[0067] With step 2 in embodiment 1;

[0068] Step 3: Transplanting and management of mycorrhized tobacco seedlings

[0069] According to the transplanting method of step 3 in Example 1, lead nitrate and cadmium nitrate are added in the air-dried soil to form lead / cadmium pollution levels that are respectively 0 / 0, 350 / 1, 500 / 10, 1000 / 100mg / kg. Four kinds of soils with different pollution degrees represent no pollution, light pollution, moderate pollution and heavy pollution respectively, respectively apply corresponding calcium nitrate under different lead / cadmium pollution levels, and then according to step 3 in embodiment 1 Manageme...

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Abstract

A method for using arbuscular mycorrhizal fungi and organic fertilizer to reduce residue of lead and cadmium in tobacco includes: preparing arbuscular mycorrhizal fungi inoculant, culturing mycorrhizal tobacco seedlings, and transplanting and managing the mycorrhizal seedlings. Tests show that arbuscular mycorrhizal fungi and cow dung added to soil coordinate to promote plant growth, increase phosphorus content of vegetation, lower poison and pollution of tobacco by lead and cadmium and promote tobacco growth, thereby reducing the residue of lead and cadmium in the tobacco.

Description

technical field [0001] The invention relates to a method for promoting tobacco growth and reducing tobacco lead and cadmium residues, in particular to a method for reducing tobacco lead and cadmium residues by using arbuscular mycorrhizal fungi and organic fertilizers. Background technique [0002] Tobacco is an important economic crop in my country. At the same time, tobacco is a special food. There are a large number of smokers in my country, so its quality and safety have been widely valued. In recent years, there are often reports of quality and safety issues such as excessive heavy metals in tobacco, which will inevitably affect my country. Competitiveness and healthy development of the tobacco industry. In my country, the tobacco planting area, flue-cured tobacco production and production volume rank first in the world. Heavy metals in tobacco can enter the human body through combustion and mainstream smoke during the smoking process, causing potential harm to the human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01G7/06
Inventor 王发园石兆勇仝瑞建
Owner HENAN UNIV OF SCI & TECH
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