Effect of medium nutrient and seedling growth under fertilization condition in Tray-water-bed systems

The tray-water-bed systems assimilate the merit of the floating systems and the tray systems in the seedling production of the flue-cured tobacco. It is necessary to study the nutrient characteristics under different fertilization condition for improving the seedling quality. The results showed that the nutrient contents increased considerably and the pH value fell down after fertilization but recovered only 15 days later. The nitrogen and potassium accumulated at the surface level, while the phosphorus at the lower level. The fertilization of 0.15-0.20 g/kg could meet the requirement of the vigorous seedling in the tested medium.