Difference between Burley Tobacco and Flue-Cured Tobacco in Nitrate Accumulation and Chemical Regulation of Nitrate and TSNA Contents

Figure 1

Difference between burley tobacco and flue-cured tobacco in NRA, NRA/NA, and NO₃-N content of leaves. Burley tobacco varieties were KT204 and TN86, and flue-cured tobacco varieties were HD and Y87. NA: nitrogen application (HD and Y87: 45 kg ha⁻², KT204 and TN86: 180 kg ha⁻²). NRA: nitrate reductase activity. Error bars indicate standard error of the means ().

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