Research Article
Difference between Burley Tobacco and Flue-Cured Tobacco in Nitrate Accumulation and Chemical Regulation of Nitrate and TSNA Contents
Figure 4
Effects of treatments on total nitrogen content, NO3-N content, NO2-N content, alkaloid content, and NO3-N/TN in burley tobacco. NO3-N/TN: ratio of NO3-N and total nitrogen content (TN). Error bars represent standard error (). Symbols and indicate significant difference at 0.01 or 0.05, respectively.
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