Response of Sorghum bicolour (L) Moench) varieties to nitrogen fertilization under Sana'a conditions in the Republic of Yemen
2005
Al-Azaki, Aly
Two field experiments were conducted in 2002/2003 growing seasons in the Faculty of Agriculture Research Farm -Sana'a University. The objective is to study the response of sorghum varieties to N -Fertilizer application . The study included 3-Sorghum varieties: Tajanb (Al), Morsalah Haja (A2) and Bouni-Red (A3) 4 N- Fertilizer levels:zero (NO), 50(NI), 100(N2),150 (N3) Kg nitrogen/ha. The N- Fertilizer levels were applied oat month after planting and the Urea (46%) was used as a source of Nitrogen . the two experiments were planted at the first of May of 2002 and 2003 in RC.B.D. factorial experiment with 4 replications . The main results were as Follow: - Significant differences were found among Sorghum varieties in leaf area . The variety A2 gave higher voles. Than Al and A3. - Significant differences were found higher among sorghum varieties in flagvalues and plant height The variety A1 gave the highest value. -There is no significant differen ces among sorghum varieties in number of leaves - The variety A l gave significant higher values than A2 and A3 varieties in number of grains per head and 1000 -kernel weight . - The variety Al reported the higher yield compared with the other varieties A2and,A3 in yield per plant, but the differences between A2 and A3 was not significant. - Application of 150Kg N/ha(N3) has significantly increase on mean of leaf areas and flag -leaf areas . - Application of N- Fertilizer levels did not significantly affect the number of leaves. - Application of 150Kg N/ha(N3) gave the highest values in plant height. grains/head, 1000 - kernel weight, and yield/plant . - Application of 150Kg N/ha(N3) and 100Kg N/ha(N2) were not significantly different in plant height, seed/head, 1000-kernel weight, and grain yield/plant.
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