O O Olubode


Field experiment was conducted on Hybrid Tea Roses (Rosa x Hybrida L.) from 2012 to 2014 in Abeokuta to determine the relative effects of seasonal variations and soil amendment on crop growth under rain-fed conditions. The study was a 2 x 2 x 4 factorial experiment fitted into a Randomized Complete Block design with three replications. Two seasons, two Hybrid Tea Rose cultivars (Immaculate’ and ‘P.H. Baby’), and four levels of chicken manure (0, 5, 10 and 20 t/ha) were the factors. Results showed that Year II juvenile and matured ‘Immaculate’ had >100% taller plants (104.3 and 171.6 cm, respectively) compared to Year I juvenile ‘Immaculate’ and ‘P.H. Baby’ at both seasons (26.2, 28.2 and 55.7 cm respectively) and at mature stage (36.1, 38.0 and 100.5 cm, respectively). In Year II juvenile ‘Immaculate’ had >100% more leaves (177.5) compared to the corresponding Year I juvenile ‘Immaculate’ (66.8) and ‘P.H. Baby’ (79.3 and 73.9, respectively). Matured ‘Immaculate’ (244.0) had 58, 50, and 40% more leaves in Year II compared to Year I matured ‘Immaculate’ (103.7) and matured ‘P.H. Baby’ at both seasons (122.9 and 144.7, respectively). Flower induction occurred with moisture stress at juvenile but with lower minimum temperature at mature growth stage. Manure applied to Year II juvenile rose had 66-400% taller plants and 200-300% more leaves compared to Year I. Although, 10 t/ha manure had best influence on juvenile plants, however, Year II matured plants with 5 t/ha were tallest, while Year I matured plants were taller with 5 or 20 t/ha, and thicker with 5 t/ha compared to other treatments. Correlations between season, growth and flower production showed effect of seasonal variation contributing significantly to productivity of rose cultivars. 


Crop productivity, flowering pattern, hybrid tea rose, interaction effects, manure rates

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