Tobacco field management method for improving quality of upper tobacco leaves

Abstract

The invention relates to a tobacco field management method for improving quality of upper tobacco leaves. By the adoption of a cultivation method that the tops of tobacco are sleeved with plastic bags instead of topping, from the first blooming stage to the full blooming stage of the tobacco, all inflorescences together with three to five small tobacco leaves at the topmost portion are sleeved with shading materials instead of traditional manual topping, and therefore flowers and the leaves at the tops of the tobacco gradually die under the high-temperature, high-humidity and dark environment in the bags. Compared with the prior art, the tobacco field management method has the advantages that the apical dominance of the tobacco fades away, nutrients of the tobacco and coordination of chemical components of the tobacco leaves are guaranteed, and the effect of improving the quality of the upper tobacco leaves is obvious; the apical dominance of tobacco plants fades away, growth and development of axillary buds are restrained, the use quantity of suckercides is reduced, and quality safety of the tobacco leaves is improved; if bud picking is carried out manually, the frequency of bud picking is reduced, and labor is relieved; the bags are made of blue or black plastic materials convenient to obtain, cost is low, the bags are cleared away together with tobacco stems later, and no environment pollution is caused.

Description

technical field [0001] The invention relates to a flue-cured tobacco field management method for improving the quality of upper tobacco leaves, and belongs to the technical field of flue-cured tobacco planting. Background technique [0002] Topping and pruning is a necessary field management measure in flue-cured tobacco production and a key technology to regulate the growth of tobacco plants and improve the quality of tobacco leaves. The purpose of flue-cured tobacco planting is to harvest tobacco leaves. After the budding of tobacco plants, the top inflorescences grow actively, a large amount of nutrients flow to the top, and the nutrients in the middle and lower leaves continue to flow to the top. If it is allowed to bloom and bear fruit, it will inevitably lead to unnecessary consumption of nutrients, making the upper leaves small and thin, the color of the middle and lower leaves will become lighter, the weight will decrease, and the yield and quality will be reduced. ...

AI Technical Summary

Problems solved by technology

However, due to ecological environment factors and traditional cultivation technology measures, the quality of upper tobacco leaves in some tobacco areas in my country is generally low. The concentrated performance is: thicker leaves, stiff tissue, uncoordinated internal chemical components, high nicotine content, reducing sugar content and Low sugar-alkaline ratio, poor industrial availability

Tobacco researchers at home and abroad have done a lot of research on improving the quality of the upper tobacco leaves of flue-cured tobacco, such as applying appropriate nitrogen and phosphorus fertilizers, increasing the amount of potassium fertilizers, supplementing medium and trace elements, adjusting pH with lime, adding organic fertilizers, and watering according to the growth and development of tobacco plants. Watering, timely transplanting, timely topping and leaf retention, application of growth regulators, suitable harvesting, and optimization of conditioning conditions, etc., although to a certain extent have improved the quality of the upper tobacco leaves, but it is inevitable that the technical operability is not strong, and the increase Disadvantages such as cost

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