Effects of Different Application Rates of Nitrogen Fertilizer on Growth,Development and Quality of Flue-cured Tobacco K326

This paper studied the effects of different application rates of nitrogen fertilizer on the growth duration,agronomic characters,appearance quality of tobacco leaves,economic traits and inner chemical composition of flue-cured tobacco cultivar K326 through the field experiment.The results showed that the increasing of nitrogen fertilizer application rate in the range from 97.5 kg/hm2 to 142.5 kg/hm2 could improve the agronomic characters and economic characters of tobacco plants,enhance the appearance quality of tobacco leaves,harmonize the inner chemical composition of tobacco leaves,and increase the yield and production value per unit area.Among 4 treatments,the treatment of applying 142.5 kg/hm2 pure nitrogen obtained the best effect.