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Pakistan Journal of Biological Sciences

Year: 1998  |  Volume: 1  |  Issue: 4  |  Page No.: 348 - 350

Response of Two Sunflower (Helianthus annuus L.) Cultivars To Different Levels of Nitrogen

M. Ayub, A. Tanveer, Z. Iqbal, M.S. Sharar and M. Azam


Response of two sunflower cultivars namely Aritar-93 and suncom-110 to N levels of 0, 50, 100 and 150 kg ha–1 was studied under field conditions. Sunflower cultivar suncom-110 produced significantly higher plant height, leaf area per plant, 1000-achene weight and achene yield. Plant height, leaf per plant, stem diameter, no. of achenes per disc and achene protein contents were maximum at N level of 150 kg ha–1. Whereas, oil contents were significantly higher in control. Nitrogen application at 100 and 150 kg ha–1 gave statistically similar achene yields of 15.95 and 16.18 q ha–1 respectively. Application of nitrogen more than 100 kg ha–1 seems to be uneconomical.

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