Influence of Different Nitrogen Levels on Yield,Quality,Dry Matter and Nitrogen Accumulation and Distribution of Flue-cured Tobacco

The results from the field test in 2002 showed that accumulation of dry matter and nitrogen of flue cured tobacco was mainly completed in vigorous growth stage and increased with the enhance of nitrogen fertilizer.The proportion of distribution of dry matter and nitrogen in root,stem,leaves was leavesstemroot, but was affected slightly by nitrogen levels and showed no apparent law;among the different treaments.The final proportion of dry matter of root,stem and leaves in plant was 12%-21%,23%-26% and 54%-65%, and the final proportion of nitrogen accumulation of root,stem and leaves in plant was 12%-19%,20%-26% and 58%-67%;In treatments of nitrogen application,the economic benefits of treatment of 97.5 kg/ha was best.