The effect that water - solubled amino acid fertilizers had on the growth and development of tobacco as well as the tobacco mosaic disease at the stage of rapid shoot growth have been researched by randomized experiments on the materials of K326. The results suggested that the use of this fertilizer would prolong the growth season ( average 7 d) and vigorous growth time ( average 4 - 8 d). Besides, it also improve agronomic characters of tobacco, T1 treatment ( fertilization water - solubled amino acid fertilizers three times base on the l...