Yield Assessment of Bread Wheat (Triticum Aestivum L.) Under Planned Nitrogen

Abstract

This research aimed to investigate the influence of various levels of urea as the source of nitrogen on yield and yield-related characteristics such as plant height (PH), spikelet per spike (SPP), spike length (SL), tillers, peduncle length (PL), biomass, spike weight per plant (SWPP), grains per plant (GPP) and spikes per plant (SPP) of wheat cultivars "Aas-2002", "GA-2002" and "Ufaq". This study performed in greenhouse and consisted of six treatments in pots such as (T₀) 0/5 kg, (T₁) 250 mg/5kg, (T₂) 375 mg/5 kg, (T₃) 500mg/5kg, (T₄) 562.5mg /5kg and (T₅) 687.5mg/5 kilograms per pot of nitrogen applied at three different stages of growth (tillering, anthesis, and grain filling) to evaluate their effect on wheat yield. The total amount of N in the given quantity of Urea for T₀, T₁, T₂, T₃, T₄, and T₅ was 0, 115 mg, 172.5 mg, 230 mg, 258.75 mg, and 316.25 mg respectively. Results indicated that yield and yield-related traits responded substantially to the amount of nitrogen, but its excessive concentration shows adverse effects. Nitrogen rate at 262.125 mg/5 kg of urea was more appropriate for Aas-2002 and Ufaq, and maximum yield was obtained at this level. In contrast, the suitable N rate for GA-2002 was 320.125 mg/5 kg giving maximum output. It is concluded that three N-splits are ideal for enhancing bread wheat yield.