Method for lowering Cd content in tobacco leaves by utilizing grafting technology

A tobacco leaf and technology, applied in the field of controlling the Cd content of tobacco leaves by using grafting technology, can solve problems such as undiscovered tobacco leaves, and achieve the effects of avoiding the risk of changing the soil ecological environment, avoiding secondary pollution, and avoiding time-consuming and labor-intensive

Inactive Publication Date: 2012-07-18
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of grafting technology in reducing harmful substances in tobacco leaves has not been found so far

Method used

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  • Method for lowering Cd content in tobacco leaves by utilizing grafting technology
  • Method for lowering Cd content in tobacco leaves by utilizing grafting technology
  • Method for lowering Cd content in tobacco leaves by utilizing grafting technology

Examples

Experimental program
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Effect test

example 1

[0020] Test method: pot test

[0021] Test varieties: flue-cured tobacco variety K326 and yellow flower tobacco variety N. rustica

[0022] Grafting method: K326 as the scion, N. rustica make rootstock

[0023] Soil Cd content: 1.12mg / kg

[0024] Test results: as shown in Table 1

[0025] Result analysis: known from Table 1: grafted seedling K326 / N. rustica The cadmium content in the leaves of each part was significantly lower than that of the K326 self-rooted seedlings, while the Cd content in the roots was higher than that of the control self-rooted seedlings. The ratios of the average Cd content in the leaves and the average Cd content in the roots of the two were 2.7 and 7.6, respectively. The average Cd content of leaves of grafted tobacco plants decreased by 36% compared with that of control self-rooted seedlings. This indicated that through grafting with the roots of Nicotiana chrysalis, the new tobacco plants had the ability to accumulate Cd in the roots of N...

example 2

[0027] Test method: pot test and nutrient solution culture test

[0028] Test varieties: Burley tobacco variety KY14 and yellow flower tobacco variety N. rustica

[0029] Grafting method: KY14 as the scion, N. rustica as rootstock;

[0030] KY14 was used as scion and rootstock for self-grafting

[0031] Cd content in soil solution: 0.3μmol / l

[0032] Cd concentration in nutrient solution: 3μmol / l

[0033] Test results: pot test (table 2) and nutrient solution culture experiment (table 3)

[0034] Result analysis: The results of the pot test (Table 2) show that: under the condition that the Cd concentration in the soil solution is 0.3 μmol / l when the exogenous Cd pollution is added, the KY14 / N. rustica Compared with KY14 self-rooted seedlings and KY14 / KY14 self-grafted seedlings, the grafted seedlings accumulated more Cd in the roots and a smaller proportion in the tobacco leaves. The leaf-to-root ratios of the average Cd content of the three were, respectively, 0.95...

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Abstract

The invention relates to a method for lowering Cd content in tobacco leaves by utilizing the grafting technology. The method is characterized in that common tobacco is used as scion, rustic tobacco is used as rootstock, and grafting is carried out, and the grafted new tobacco plants have the capability of enriching Cd at the root system of rustic tobacco, and can reduce the transportation of Cd to the above-ground part and reduce the migration of Cd to tobacco leaves, thus the accumulation amount of Cd in the tobacco leaves is lowered. As compared with the traditional tobacco leaf heavy metal content control technique, the method has the following characteristics that (1) the effect of lowering Cd content in the tobacco leaves is obvious; (2) foreign materials are not needed to be added to the soil, thus the soil secondary pollution and the risk of changing the soil ecological environment are avoided; (3) grafting is completed at one time during tobacco nursery stage, thus the problem of wasting time and labor due to multi-time operations during field growth stage of the traditional method is avoided; and (4) the obtained tobacco plants are non-transgenic plants and are not influenced by transgenic technology application limit.

Description

technical field [0001] The invention relates to a technology for controlling heavy metals in tobacco leaves, in particular to a method for controlling Cd content in tobacco leaves by using grafting technology. This method provides a new way to control the Cd content in tobacco leaves, and especially provides a low-cost and easy-to-operate technical choice for safe production of tobacco leaves in tobacco areas with high background values ​​of heavy metals in soil. Background technique [0002] The heavy metals in tobacco leaves mainly come from the soil. At present, controlling the migration of heavy metals in soil to tobacco leaves is the main way to control heavy metals in tobacco leaves. The main methods are: 1. Soil heavy metal solidification. This method is to change the occurrence form of heavy metals in the soil and reduce the mobility and bioavailability of heavy metals in the soil by applying some soil repair agents such as lime, clay minerals, organic matter and sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/06
Inventor 张艳玲田阳阳王建伟张仕祥刘阳陈剑梁太波薛超群
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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