Bull. Spec. CORESTA Congress, Vienna, 1984, p. 102, A30, ISSN.0525-6240

Fraction I leaf protein content and yield of Greek tobacco cultivars grown at two plant population densities

University of Thessaloniki, Agronomy Dept., Thessaloniki, Greece
A field experiment was undertaken with the objective to test three tobacco cultivars grown in Greece as to their suitability to produce fraction I protein at two plant population densities and irrigation. The cultivars used were KP2a and KS6 of the Oriental type and B21 of the American type at population densities of 166,600 and 333,200 plants/ha for the first two cultivars, and 50,000 and 100,000 plants/ha for the third one. Three cuttings were done during the growing period and the fresh weight of leaves as well as their content in fraction I protein was determined. The fraction I leaf protein content for cultivars B21, KP2a and KS6 was 8.0, 5.3 and 5.1 mg/g fresh weight, respectively. High plant population density increased significantly the yield of fresh leaves (37 vs. 51 tn/ha) but no differences between cultivars were found. The yield of fraction I protein was affected both by cultivar and plant density. Cultivar B21 gave the highest yield i.e. 301 and 407 kg /ha for the low and high density respectively, followed by KP2a (220, 283 kg/ha) and KS6 (204, 279 kg/ha).