Abstract            Volume:11  Issue-3  Year-2023         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

The experiment was conducted to assess the effects of nitrogen rate and time of application on nitrogen use efficiency (NUE) of malt barley varieties and their associations with grain yield and protein content. Factorial arrangement of randomized complete block design with three replications Four N rates (50, 70, 90, and 110 kg ha-1), three times N application (T1 = full dose at sowing, T2 = 1/2 at sowing and 12 doses at mid-tillering, T3 = 1/4 dose at sowing, 12 doses at mid-tillering, and 1/4 dose at anthesis), and two malt barley varieties (IBONE 174/03 and EH 1847) were used in the treatment. The interaction effects of N rates with the time of application significantly increased grain yield from 2889.00 to 6611.10 kg ha-1 with an acceptable range of grain protein contents of 9 to 12%. Varieties also significantly influenced the level of protein content. Though unacceptable in quality, the EH 1847 variety gave the highest grain protein content (12.21%), while the IBONE 174/03 variety gave an acceptable level of protein content (10.57%). N uptake increased along with N rates and times of application, which had a significant effect on grain yield. The straw yield was significantly affected by N rates, time of N fertilizer application, and variety. When compared to a single and two-time application, the three-time application of the highest N rate (110kg N ha-1) improved grain N uptake, total N uptake, N use efficiency of grain, and N harvest index of malt barley.

Download this article as