The effect of different levels of nitrogen on yield and yield components of hulless barley (Hordeum vulgare L. var. nudum) varieties in south marmara conditions

This research was carried out to determine the effects of different nitrogen levels (0, 50, 100, 150, 200 and 250 kg / ha) on yield and yield components of winter Yalın barley cultivars in 2017-18 and 2018-19 production years under Güney Marmara (Bursa and Balıkesir/Manyas) conditions. Experiment was carried out in a randomized complete block design with three replications. In the study plant length, spike length, fertile spikelets per spike, the number of grains per spike, grain weight per spike, 1000 grain weight, test weight and grain yield were investigated. According to the research results; while nitrogen doses applied in Bursa conditions have a significant effects on plant height, spike length, fertile spikelets in spike, grain number in spike and grain yield at a probability level of 0.01, its effect on hectoliter weight was 0.05 level. The highest grain yield was obtained from 150 kg /ha N, economic optimum N level was determined as 17,02 kg /ha N. In Balıkesir/Manyas conditions, nitrogen doses applications were important effect on plant height, grain number in spike, grain weight in spike and grain yield at 0.01 probability level, while it had a significant effects a probability level of 0,05 on fertile spikelets in spike and grain weight in spike. The highest grain yield was obtained from 150 kg /ha N, economic optimum N level was determined as 24,25 kg /ha N. While the grain yield increased up to a certain dose in parallel with the increase in the nitrogen dose under both Güney Marmara (Bursa and Balıkesir / Manyas) conditions, then a decrease occurred.