Analysis of contents of sugar and nitrogen in flue-cured tobacco leaves from Guangdong Province.

Contents of sugar,nitrogen and the coordination were analyzed in flue-cured tobacco samples from Guangdong tobacco-growing areas.The results indicated that contents of total sugar,reducing sugar and Shmuck value were high,contents of total nitrogen,nicotine,the ratio of reducing sugar to nicotine and total nitrogen to nicotine were medium,content of protein was low,coefficient of variation(32.28 %) of the ratio of reducing sugar to nicotine was the biggest,coefficient of variation(11.62 %) of protein content was the smallest.Content of total sugar,nicotine,the ratio of reducing sugar to nicotine,total nitrogen to nicotine and Shmuck value in flue-cured tobacco leaves had highly significant difference among different grades,reducing sugar had significant difference among different grades.Contents of reducing sugar,total nitrogen and protein in flue-cured tobacco leaves had highly significant difference among different areas.Content of total nitrogen had highly significant difference among different cultivars,content of reducing sugar had significant difference among different cultivars.