Lean tobacco floating seedling-raising method

Abstract

The invention discloses a lean tobacco floating seedling-raising method. During a tobacco floating seedling-raising process, the bottom of a seedling pool must be flat, water is added into the seedling pool before floating seedling-raising discs are arranged in the seedling pool to perform seedling raising, the depth of the water is 1.0-2.0 cm, the corresponding amount of floating seedling-raising nutriment liquid fertilizer is added into the seedling pool, and the concentration of nitrogen in water in the seedling pool is allowed to be 100 ppm-150 ppm; during the seedling-raising process, once water (nutrient solution) in the seedling pool is used up due to evaporation and absorption (in this time, the seeding substrate must keep wet and not dry), water with the depth of 1.0-2.0 cm and the corresponding amount of nutriment liquid fertilizer are instantly added into the seedling pool, and the concentration of nitrogen in water in the seedling pool is allowed to be 100 ppm-150 ppm, that is repeated till the seedling raising process is finished. The lean tobacco floating seedling-raising method further includes disinfection of the seedling-raising discs, substrate filling, sowing, seedling thinning, temperature and humidity management, leaf cutting and seedling training which are identical to that of the conventional tobacco floating seedling-raising methods. The lean tobacco floating seedling-raising method is lean and can save fertilizers and water, the cultivated tobacco seedlings can germinate and emerge in advance, the whole seedling growth period is shortened by more than 7 days, and the cultivated tobacco seedlings are health and strong and are developed in root systems.

Description

Technical field: [0001] The invention belongs to the field of tobacco planting, and in particular relates to a method for raising lean tobacco seedlings by floating. 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, modern conjoined greenhouses are built, and seedling ponds are built. In the seedling ponds, 10cm deep water is stored and nutrient liquid fertilizer is added. There are shaped foam floating seedlings with substrates and seeds floating on it. Trays (shaped foam floating seedling trays can be reused for many years), seeds and tobacco seedlings absorb nutrients in the nursery pond water through the capillary action of the matrix for growth, and the seedling matrix is ​​prepared in a factory, the matrix is ​​sterilized, the temperature and humidity are controlled, and the leaves are cut to strengthen the seedlings , the to...

AI Technical Summary

Problems solved by technology

However, the current floating seedling cultivation technology is not lean: First, because of worrying that applying the nutrient solution first will affect the germination and emergence of the seeds, the nutrient solution is applied after the emergence of the tobacco seedlings. Because the tobacco seeds are small, the seeds themselves have less nutrients, and the seeds need to germinate and emerge. Nutrition, the application of nutrient solution after the emergence of tobacco seedlings objectively affects the nutrient absorption of germination and emergence, delays and affects germination and emergence, and also affects the timely nutrient absorption and subsequent growth and development after emergence, prolonging the growth period of tobacco seedlings; , the existing floating seedling raising technology seedling pond implements 10cm deep water level, wasted fertilizer and water, must discharge the water containing a large amount of residual fertilizer nutrition to the environment after the seedling raising finishes, polluted environment; The specific heat is large and the temperature rises slowly, increasing the time that the tobacco seedlings are in the low temperature stage, affecting the growth and development of the tobacco seedlings and prolonging the growth period of the tobacco seedlings; in arid areas or periods, it will increase the difficulty of watering