Comparative investigations of the transpiration rate and pattern in some tobacco hybrids of the Virginia type
1987
Dubravec, K. | Devcic, K. | Primorac, I. (Duhanski institut, Zagreb (Yugoslavia))
On comparative investigations of the transpiration rate (Tr) and pattern in some tobacco hybrids of virginia type we can state the following: the greatest transpiration was observed in the hybrid with the greatest number of stomata, i.e. in the hybrid Drava which had daily mean Tr values of 4.48-12.56 mg/g/min. (Bozjakovina) and 3.58-10.51 mg/g/min (Pitomaca), followed by Zagreb with Tr values 3.91-9.26 mg/g/min (Bozjakovina) and 3.41-11.78 mg/g/min (Pitomaca), and by Podravina with Tr values of 4.60-10.03 mg/g/min (Bozjakovina) and 3.37-8.80 mg/g/min (Pitomaca); the highest mean Tr values were observed in the middle leaves, and the lowest in the technologically mature bottom leaves; the most intensive transpiration in the hybrids under investigation was observed from the beginning up to full bloom; the hybrids Podravina and Zagreb, considering their transpiration capacity, are suitable for cultivation in relatively dry habitats.
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