Effect of nitrogen fertilizer levels on growth, yield, nitrogen use efficiency and its parameters for several bread wheat cultivars

	Effect of nitrogen fertilizer levels on growth, yield, nitrogen use efficiency and its parameters for several bread wheat cultivars
journal of kerbala university
Article 1, Volume 8, Issue 4, 2012, Pages 29-44 PDF (0 K)
Abstract
A field experiment was conducted at the experimental farm of Abn Al- Betar secondary school in Al- Husseinia –Karbala province in winter season of 2011-2012. Asplit plot arrangement with Randomized Complete Block Design in three replicates was used. The objective to this experiment was investigate the response of eight wheat cultivars were assigned in the subplots (Al-Tahady, Al-Adnania ,Al-Iraq ,IPA95 ,Ashur ,Sali ,Al-fatehand ,Sham6)to three nitrogen levels (69,138,and207kgN/ha) were assigned in the main plots . The Results showed that Al-Iraq cultivar with 207 kg/ha gave the highest interaction of nitrogen in straw(2.60%), protein in straw (15.48%) , total uptake of nitrogen (324.64kg.kg-1), grain/spike(60.00 grain) harvest index (52.58%), grain yield (6334kg/h). The same cultivars also with(138,207kgN/h)gave the higher rate of 1000 grain weight(53.67,46.66 g) respectively, also Results showed that nitrogen fertilizer of 69 kg/h with Al-Adnania cultivar gave the best interaction in nitrogen use efficiency(48.06 kg.kg-1), nitrogen harvest efficiency(1.15 kg.kg-1), nitrogen harvest index(64.00%).and to surpass biomass yield (10611 kgh), grain yield (3317 kgh).

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