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Journal of Biological Sciences
Year: 2007  |  Volume: 7  |  Issue: 5  |  Page No.: 771 - 775

Eco-Physiological Responses of Tithonia diversifolia (Hemsl) A. Gray in Nursery and Field Conditions

K.S. Chukwuka, S. Ogunyemi, J.S.A. Osho, G.I. Atiri and J.I. Moughalu    

Abstract: The effects of water, light and chemical fertilizer (NPK) on the growth and development of Tithonia diversifolia (Hemsl) A. Gray were investigated under nursery and field conditions. The number of leaves produced and biomass accumulation by T. diversifolia increased with the age of the plant from 55.0±6.4 at 6 weeks after planting (WAP) to 1352.0±39.8 leaves (14 WAP) and 4.5±0.2 g/plants (6 WAP) to 1259.4±19.1 g/plants (14 WAP), respectively. This trend was maintained under both optimum and stressed conditions of water, light and chemical fertilizer. Light was the next most important factor after water with respect to biomass accumulation of T. diversifolia. With minimum light intensity (500 lux), the biomass accumulation was 85.87plusmn;3.7 g/plants whereas without fertilizer application the biomass accumulation was 301.4±4.4 g/plant.

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