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Method for reducing heavy metal residues in tobacco by use of arbuscular mycorrhizal fungi

A technology of arbuscular mycorrhizal fungi and heavy metals, applied in fungi, botanical equipment and methods, applications, etc.

Inactive Publication Date: 2011-05-11
HENAN UNIV OF SCI & TECH
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Problems solved by technology

Due to various reasons, the large-scale application of these amendments is often limited, such as lime and clay minerals have a greater impact on soil properties, and calcium magnesium phosphate fertilizers and livestock manure often contain heavy metals

Method used

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  • Method for reducing heavy metal residues in tobacco by use of arbuscular mycorrhizal fungi
  • Method for reducing heavy metal residues in tobacco by use of arbuscular mycorrhizal fungi
  • Method for reducing heavy metal residues in tobacco by use of arbuscular mycorrhizal fungi

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Embodiment Construction

[0020] The present invention utilizes arbuscular mycorrhizal fungi to reduce the method for heavy metal residues in tobacco as follows:

[0021] (1) Proliferation of arbuscular mycorrhizal fungi

[0022] The initial arbuscular mycorrhizal fungal agent was provided by the Nanjing Institute of Soil Science, Chinese Academy of Sciences, Glomus scotchii ( Glomus caledonium 90036) and G. rhizogenes provided by China Agricultural University ( Glomus intraradices BEG 141). Using river sand as the substrate, pass the river sand through a 1mm sieve, sterilize it with high-pressure steam at 121°C for 2 hours, and add the initial arbuscular mycorrhizal fungal agent according to 5% of the mass ratio of the substrate. The river sand after the bacteria is mixed well, then 20% of the substrate weight water is added to the substrate, and the seeds of sudangrass are sown. During the growth process of the sudangrass, 1 / 4 intensity of Hoagland is poured every 3 weeks according to 10% of the...

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Abstract

The invention relates to a method for reducing heavy metal residues in tobacco by use of arbuscular mycorrhizal fungi. The method comprises the following steps: (1) propagating preparation of arbuscular mycorrhizal fungi; (2) culturing mycorrhizal tobacco seedlings; and (3) transplanting the obtained mycorrhizal tobacco seedlings in the field. Tests prove that the arbuscular mycorrhizal symbiont of arbuscular mycorrhizal fungi and tobacco can improve phosphorus nutrition condition of tobacco, promote tobacco growth, reduce heavy metal absorption of tobacco, reduce the migration of heavy metal from the root system to the aboveground part of tobacco, thereby reducing the heavy metal residues in tobacco.

Description

technical field [0001] The invention relates to a method for reducing heavy metal residues in tobacco, in particular to a method for reducing heavy metal residues in tobacco by using arbuscular mycorrhizal fungi. Background technique [0002] Tobacco is one of the important economic crops in my country. In my country, the tobacco planting area, flue-cured tobacco output and production volume all rank first in the world. In recent years, there have been frequent reports of tobacco quality and safety issues such as excessive heavy metals (Zhang Yanling and Zhou Hanping, 2004; Niu Zhufeng et al., 2006; Zhang Chuandong et al., 2008; Wang Xiaomin et al., 2008; O'Connor et al., 2010), which will inevitably affect my country's tobacco industry. The competitiveness and healthy development of the industry. [0003] Excessive heavy metal residues in tobacco have a certain relationship with the soil in which tobacco grows. At the same time, irregular fertilizers and pesticides can also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00C12N1/14
Inventor 王发园石兆勇徐晓锋常会庆苗艳芳
Owner HENAN UNIV OF SCI & TECH
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