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Effects of Different N Rates on Flue-Cure Tobacco Yield and Immanent Quality

ZHENG Xian-xia1,PIAO Shi-ling1,LIU Dan1,YANG Wen-ju2,ZHU Lian-hua2(1.College of Agriculture,Yanbian University,Longjing 133400,China;2.Luozigou Vocational High School of Wangqing County,Wangqing 133216,China)  
To harmonize immanent chemical components in tobacco leaves and to improve immanent quality,the experiment on the effects of different N rates on flue-cure tobacco growth and immanent quality was performed.The results showed in every treatment,yield increased steadily along with N rate increase and output value,proportion of superior leaf and medium leaf,and average price also increased steadily along with N rate increase,but they decreased when N rate was more than 75 kg/hm2;the content of nicotine,total nitrogen and proteide among the chemical elements in the treatment of N rate 75 kg/hm2 was better than in other treatments;the treatment of N rate 75 kg/hm2 had abundant aroma composition,satiation,mixed gas was light and aftertaste was less stagnant.The treatment compounding of N rate 75 kg/hm2 is the best one.
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