Survey of wheat response to utilization N fertilizer and population in some ecological traits

In order to investigate survey of wheat response to utilization N fertilizer and population in some ecological traits, a split plot experiment based on randomized complete block design whit three replications was conducted at agricultural research station, Islamic Azad University, Ardabil branch, Iran in 2011. Main plot included three densities (300, 350 and 400 seed m-2) and sub plots contained four nitrogen levels (0, 70, 140 and 210 kg ha-1 N). Results showed that whit increasing nitrogen levels, length of vegetative growth period increased and dry matter remobilization in to grain and its impact of grain yield was decreased. Also, the length generative growth and ripening period and grain yield were obtained using 140 kg ha-1 N and excess rates, decreased grain yield. Whit increasing plant density, all measured traits were increased. As results to increase remobilization and grain yield, prevent of environmental pollution and decrease in fertilizer application as excess cost, application of 140 kg ha-1 N in 400 plant m-2 density (whit conditions of this research), is recommended.