oa Agrochemophysica - The effects of colouring times and stalk position of the leaf on the quality of flue-cured tobacco (248KB) (32KB)

Volume 7, Issue 2
  • ISSN : 0302-7112



South African flue-cured tobacco, Nicotiana tabacum L. cv. Hicks 76, was reaped according to four stalk positions: lugs, cutters, leaf and tips. The leaves were coloured according to standard procedures (Tl) and for T2 and T3, 24 and 48 hours respectively were added to Tl. Both bulk and conventional curing were used. T2 gave the best tobacco both by organoleptic evaluation and by physical and chemical analysis. Regardless of the type of curing used, T2 tobacco was highest in value, moisture equilibrium, starch and total sugars and lowest in filling power, carotenoids, total and insoluble nitrogen and total ash. Within limits, stalk position played a more important role in the control of physical and chemical properties of the cured tobacco than did colouring times. With the exception of Tl, which produced the poorest quality tobacco, the differences occurring with colouring times were smaller than differences coming from the variation in stalk position. Several loads of tobacco were coloured in the bulk-curer without the addition of heat and this tobacco showed no differences in its physical and chemical properties from the material which was coloured with additional heat.

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