Course of chloride concentration in tobacco leaves through the harvesting season
Titel:
Course of chloride concentration in tobacco leaves through the harvesting season
Auteur:
Metochis, C. Orphanos, P. I.
Verschenen in:
Journal of plant nutrition
Paginering:
Jaargang 13 (1990) nr. 5 pagina's 485-493
Jaar:
1990-05
Inhoud:
The Cl concentration in laminae and midribs at each harvest of flue-cured tobacco (cv C139) is presented for a number of experiments in which irrigation, topping and N fertilizing were tested. Irrigating with water containing 60-100 mg L-1 Cl increased leaf Cl at all harvests, but topping and N fertilizing (70-160 kg N ha-1 ) hardly affected it. However, irrespective of any treatment effects, lamina Cl was highest at the first harvest and declined to a varying degree, but mostly linearly, in the subsequent harvests. The percent maximum relative decrease at any one harvest, compared to that of the first harvest, was 12 to 45%. Obviously, lamina Cl at the first harvest is the maximum to be expected for a crop, and extrapolations can be made from it for subsequent harvests. Chloride concentration (%) for the whole leaf (Y) can be calculated from percent lamina Cl (X) as: Y = 0.61 + 1.02 X.
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