A method for strengthening seedlings instead of cutting leaves in industrialized tobacco seedling cultivation

Abstract

The invention discloses a seedling strengthening method for replacing leaf cutting in tobacco industrialized seedling culture. During tobacco industrialized seedling culture, when tobacco seedlings grow till the tobacco stems are 1-4 cm tall, a nutrient solution is added for the last time, then, first-time foliage spray is performed, foliage spray of 20-400 ppm of a multi-effect triazole solution or 50-400 ppm of a chlormequat chloride solution or 20-200 ppm of a prohexadione-calcium solution is performed, no nutrient solution is added any more after spray is performed, leaf cutting is not performed any more, when the number of thick roots of tobacco seedling stems is large enough to meet the transplanting standard, second-time foliage spray is performed again before tobacco seedlings are transplanted, foliage spray of 3-20 ppm of a compound sodium nitrophenolate solution of an ammonium nitrate solution with the mass fraction being 0.1-1% is performed, and then conventional transplanting is performed. According to the seedling strengthening method, tobacco seedlings can be restrained from continuing to grow tall, and stem thickening and root growth are promoted, so that the purpose of seedling strengthening without leaf cutting is achieved, the leaf cutting procedure is omitted, and a leaf cutting device is omitted; leaf cutting workers are omitted; labor intensity is relieved; the seedling growing time is shortened by 15 d or more; nutrient fertilizer is saved; virus disease, fungi and other diseases are reduced, the tobacco seedlings are more robust, and root systems are more developed.

Description

Technical field: [0001] The invention belongs to the field of tobacco planting, and in particular relates to a method for strengthening seedlings instead of cutting leaves in industrialized seedling cultivation of tobacco. Background technique: [0002] Tobacco is a seedling and transplanting crop. At present, the tobacco industry is promoting modern tobacco agriculture. Tobacco seedlings are planted in factories, and modern conjoined greenhouses are constructed. Floating seedlings or wet seedlings are used, shaped seedling trays are used, and seedling substrates are prepared in factories. The substrates are sterilized, and the temperature and humidity are controlled. Cutting the leaves and strengthening the seedlings, the tobacco seedlings raised are concentrated, large in number and neat, the quality of the tobacco seedlings is high, and the seedling raising efficiency is greatly improved, which greatly promotes the modernization of tobacco seedling raising production and ...

AI Technical Summary

Problems solved by technology

However, in the process of growing seedlings, due to the dense density, the tobacco seedlings only grow stems and leaves, and the tobacco seedlings are weak, so it is necessary to cut the leaves, and use the leaf cutting to control the growth of the stem height of the tobacco seedlings so as to promote the growth of the stem thickness and strengthen the seedlings. Increase the leaf-cutting equipment; after cutting the leaves, you need to wait for the tobacco seedlings to grow tall before cutting the leaves. Generally, you need to cut the leaves 3-4 times. During the leaf cutting process, leaf cutting equipment and operations are very easy to spread viral diseases, fungi and other diseases, increasing the probability of disease occurrence, often causing large-scale disease occurrence