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Effect of several levels of Nitrogen fertilizer on the growth and yield of four sorghum genotypes | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 11, Issue 1, 2011, Pages 73-85 | ||
| Abstract | ||
| A field experiment was carried out in a clay loam textured soil in Al-Jazeera region – Habbaniya district / Al Anbar province in the spring of 2009 to investigate the effect of five nitrogen fertilizer levels (0,60,120,180,240 kg N.ha-1) in the form of Urea (46% N) on the growth and yield of four sorghum genotypes (Argins, Kafeer, Rabeh and Inkath). The system of split-split blocks have been used according to randomized complete block design (R.C.B.D. ) in three replicates. Results showed that there was significant difference among genotypes in all of the studied traits. The Kafeer genotype gave the highest average for leaves number per plant, yield of dry weight, grains number per head, weight of 500 grains and grains yield per unit area (5-26 tons/ha). While the Argins genotype gave the highest value for harvest index (36.35 %). The increase in nitrogen levels caused significant increase in all of growth and yield properties. The high level of nitrogen (240 kg N. ha-1) gave the highest level for them and grains yield (5.79 tons/ha) while it had no significant effect on harvest index value. The interaction between genotype and nitrogen fertilizer affected significantly in all studied parameters . The kafeer genotype with the high level of nitrogen (240 KgN.ha-1) indicated the highest average for plant height (149.1 cm). The genotype Inkath with the same level of nitrogen associated the highest average of growth parameters yield components and grains yield (6.93 tons/ha). The Argins genotype fertilized with the same nitrogen level showed the highest value for harvest index . We concluded that there was an increase in values of most of the studied parameters and for all of the genotypes with nitrogen levels increase. | ||
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