Abstract

The present work was carried out at the agriculture research center, Islamic Azad university of Ardabil branch, Iran, 2010 to 2011 cropping year using Seimareh durum wheat cultivars, arranged as factorial based on randomized complete block design (RCBD). Different nitrogen fertilizer levels (check, 60, 80 and 120 kg/ha) and three planting times (23^th October, 11^th November and 2^th December) with three replications were studied. Results showed that the yield was affected by fertilizer levels, planting dates and interaction between fertilizer levels and planting dates. Results of analysis of variance showed that the grain yield in this study in replication, planting dates, fertilizer levels and interaction between fertilizer levels and planting dates was significant at 0.01 percentage levels. For all traits control and 120 kg/ha^–1 was the best level of fertilizer. Final results showed that the 120 kg/ha^–1 and 11^th November were the best level for Seimareh genotype in this study.

Key words: Ardabil, dry matter, durum wheat, nitrogen fertilizer, planting dates.