Spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof

A technology of spraying agent and tobacco, which is applied in the field of safe production of low-hazard tobacco, can solve the problems of less research on migration and transformation thresholds, and achieve the effects of cost, no environmental risk, low cost, and high governance efficiency

Inactive Publication Date: 2015-07-01
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, domestic and foreign tobacco industries have conducted a lot of research on the types and detection technologies of harmful substances in tobacco, as well as selective reduction measures, such as source control technology for the prevention and control of heavy metals in tobacco, and prevention and control of heavy metal migration and transport in the soil-tobacco system. However, most of them only focus on the monitoring of heavy metal content in the soil and tobacco leaves in the tobacco planting area, the determination of the absorption and enrichment coefficient of different heavy metals by tobacco, the impact of heavy metal pollution on tobacco quality indicators and their Research on stress response mechanism, etc.
However, there are few studies on how to reduce the migration and transformation of different heavy metals in the soil-tobacco system, the remediation technology of contaminated soil, and the threshold of heavy metal content in tobacco based on human health standards

Method used

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  • Spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof
  • Spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof
  • Spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1-6 is the preparation of foliage spraying agent; Embodiment 7 is the experimental example that adopts the spraying agent prepared in embodiment 1-6 to spray tobacco leaf surface; Comparative example 1 is directly adopting zinc ion concentration of A 10 mg / L zinc nitrate aqueous solution was sprayed on the leaves of tobacco; in Comparative Example 2, the soluble organic acid solution obtained after fermentation in Example 1 was used to spray the leaves of tobacco.

[0028] Example 1

[0029] Rapeseed stalks at the mature stage were used to prepare foliar sprays as follows:

[0030] Firstly, the air-dried rape straw is crushed with a pulverizer, and after passing through a 1-mm nylon sieve, according to the ratio of the mass of the straw to the distilled water volume ratio of 1:20, weigh 1 kg of the straw powder and place it in a 30L plastic bucket, add 20L Distilled water, sealed and fermented at room temperature (25±2°C) for 2 months, and the fermentation b...

Embodiment 2

[0032] Rapeseed stalks at the mature stage were used to prepare foliar sprays as follows:

[0033] Firstly, the air-dried rape stalks were crushed with a pulverizer, passed through a 1-mm nylon sieve, and 1 kg of straw powder was weighed and placed in a 30L plastic bucket according to the ratio of the mass of the straw to the volume of distilled water of 1:25, and added 25L of distilled water, sealed and fermented at room temperature (25±2°C) for about 70 days, and the fermentation broth was filtered through a 0.45μm microporous membrane (Waters membrane), and the filtrate was a solution of soluble organic acids (DOA), in which the sulfhydryl The content is 0.52wt%; 0.686g Zn(NO 3 ) 2 .6H 2 O was added to 10L soluble organic acid solution to prepare a liquid organic complex-Zn foliar spray containing Zn concentration of 15 mg / L, and the pH of the prepared spray was 5.3. The prepared organic complex-Zn foliar spray was refrigerated at 4°C until use.

Embodiment 3

[0035] Rapeseed stalks at the mature stage were used to prepare foliar sprays as follows:

[0036] Firstly, the air-dried rape stalks were crushed with a pulverizer, passed through a 1-mm nylon sieve, and 1 kg of straw powder was weighed and placed in a 30L plastic bucket according to the ratio of the mass of the straw to the volume of distilled water of 1:25, and added 25L of distilled water, sealed and fermented at room temperature (25±2°C) for about 60 days, and the fermentation broth was filtered through a 0.45μm microporous membrane (Waters membrane), and the filtrate was a soluble organic acid (DOA) solution, of which The content is 0.49wt%; 0.915g Zn(NO 3 ) 2 .6H 2 O was added to 10L soluble organic acid solution to prepare a liquid organic complex-Zn foliar spray containing Zn concentration of 20mg / L, and the pH of the prepared spray was 5.7. The prepared organic complex-Zn foliar spray was refrigerated at 4°C until use.

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Abstract

The invention discloses a spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof. The spraying agent is prepared by adding a zinc salt into a mercapto-containing soluble organic acid solution obtained after plant straw fermentation. A Zn-organically complexing type spraying agent can make a cadmium content in tobacco leaves in cadmium pollution soil reduce 56.6-60.3%, and can make a cadmium content in tobacco stems reduce 46.7-54.8%.

Description

technical field [0001] The invention belongs to the technical field of safe production of low-hazard tobacco, and in particular relates to a spraying agent for reducing tobacco's absorption of cadmium in soil and a preparation and use method thereof. Background technique [0002] With the rapid development of my country's economy, due to the increasing heavy metal pollution from industrial "three wastes" and agricultural sources such as fertilizers, sewage irrigation and pesticides, the pollution of heavy metals (Cd, Pb, As, etc.) in the soil of different tobacco planting areas in my country is showing rapid development. This trend has posed a serious threat to the safe production of tobacco in my country. [0003] At present, my country's soil heavy metal pollution has the characteristics of low heavy metal pollution and large area. Among the heavy metal pollution elements, cadmium (Cd) has attracted much attention because of its easy migration and high toxicity to organism...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N63/00A01P21/00
Inventor 陈世宝孙聪宋文恩马义兵
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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