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Sudan Journal of Agricultural Research

Effect of different plant populations and nitrogen rates on irrigated Sunflower in the Sudan
1- crop growth

Ahmed. E. Daffalla1, A.A. Hussain1, and M. E. Lazim2


Abstract

The response of irrigated sunflower (Helianthus annuus) to three plant populations namely; 55555, 83335 and 166666 plants/ha and four nitrgen levels (0, 43, 86 and 129 kg/ha) and their interactions was investigated during two seasons (1995 and 1996). The number of leaves/ m2, leaf area index (LAI) and dry matter (DM) production /m2 increased significantly (P=0.05) with the increases in the populations. The populations, however had no significant effect on plant height. Nitrogen levels of 86 and 129 kg/ha were superior to the other levels with respect to all characters under study. However, N application had no significant effects on plant height and number of leaves/ m2. The combined effects of the two factors at the high levels significantly (P=0.05) increased LAI and DM production /m2 when they attained their maximum values .

 

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Sudan Journal of Agricultural Research Vol. 7 (2006) PP. 9-17