Effect of irrigation and oversupplying of potassium on content of nutrients and yield and quality of flue-cured tobacco

Field experiment was conducted on the effect of irrigation and oversupplying of potassium on content of nutrients, yield, and quality of flue-cured tobacco(Nicotiana tabacum L.).The results showed that there were not significant differences in content of nutrients,yield,and chemical component of flue-cured tobacco with the increasing of potassium based on the 1∶3 proportion of nitrogen and potassium. It was also found that irrigation could significantly increase the yield and high quality leaves ratio, but no significant effect was observed of irrigation and rate of potassium interaction on the content of nutrients and chemical composition in leaves.