Tobacco grafting planting method for reducing nitrosamine content in tobacco

Abstract

The invention relates to a tobacco grafting and planting method for reducing the content of nitrosamines in tobacco. The method takes wild species Solanum torubam as the rootstock and tobacco as the scion, adopts the grafting method to grow tobacco, and smears bud suppression at the grafting interface. It can prevent the growth of adventitious roots, prevent the synthesis of specific nitrosamine precursors, and reduce the content of nitrosamines in tobacco leaves. When the grafted tobacco seedlings are transplanted and cultivated in soil, the grafted seedlings can be planted. The roots of the tobacco seedlings reach the normal soil cultivation height, and the soil cultivation height is high enough to increase the supporting force of the roots of the tobacco plants, increase the wind resistance of the tobacco plants, avoid the occurrence of lodging and fracture, improve the yield of tobacco leaves, and avoid the tobacco stems on the upper part of the grafting surface. Growing adventitious roots.

Description

Technical field: [0001] The invention belongs to the technical field of improving tobacco quality and reducing tobacco damage to human health, in particular to a tobacco grafting and planting method for reducing nitrosamine content in tobacco. Background technique: [0002] Tobacco-specific nitrosamines (TSNA) mainly include N-nitrosonornicotine (NNN), 4-(N-methyl-nitrosamine)-1-(3-pyridyl)-1-butanone (NNK), N-nitrosoanatabine (NAT) and N-nitrosoanatabine (NAB), which have been confirmed to be associated with tumors in the lungs, oral cavity, esophagus, pancreas, liver and other parts. produce related. [0003] Nitrate is the precursor of tobacco-specific nitrosamine formation, and its content level is an important indicator of TSNAs accumulation. Nitrate nitrogen is the main form of nitrogen absorbed by plants, which is absorbed and utilized by plants through nitrogen reduction and assimilation. If tobacco leaves are stored in the warehouse after harvesting, the nitrate n...

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Problems solved by technology

However, during the growth of tobacco, the diameter of the tobacco stem will gradually increase. In the middle and late stages of tobacco plant growth, the diameter of the tobacco stem is much larger than the diameter of the stem of eggplant at the mature stage. low, resulting in the fragile root of the grafted plant, which is not enough to support the gradually increasing diameter of the tobacco rod and the unfolded tobacco leaves, resulting in poor wind resistance of the tobacco plant, and it is very easy to lodging in the late growth stage of the tobacco plant, and even break from the grafted part. It is almost impossible to succeed in Datian, and the output and income of tobacco leaves cannot be guaranteed

However, if the soil height covers the grafting interface, it is easy to grow a large number of adventitious roots rapidly at the grafting interface, and become the main body of the root system, and then the root system synthesizes alkaloids, the precursor substance of tobacco-specific nitrosamines, and loses the meaning of grafting

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