A field experiment was conducted in Sowairah Research Station-General commission for Agriculture Researches during the winter season of 2012-2013, in order to study the effect of four seeding rates 100, 120, 140 and 160 kg.ha-1, on grain yield and its quality for four cultivars of barely (shua'a, Amal, Sameer and Al-khair), using a split-plot arrangement in Randomized Complete Block Design (RCBD) in three replicates.
The results showed the following:
The seeding rate 160 kg.ha-1 was significantly superior in plant height 99.06 cm, number of spikes.m-2 270.20 spike grain yield 3.67 ton.ha-1, protein concentration in grain 8.82% and protein yield 322.72 kg.ha-1, while there was no significant effect of seeding rate on number of grain per spike.
Significant differences were found between all cultivars in all characters, Sameer cultivar was superior in plant height and protein concentration in grain (9.39%), Shua'a cultivar was superior in number of spikes.m-2 260.5 spike, and Al-Khair cultivar was superior in number of grain per spike 50.74 grain, grain yield 4.10 tonne.ha-1 protein yield 380.36 kg.ha-1. The interaction between seeding rate and cultivars effect in number of spikes. m-2, protein concentration in grain and protein yield. The combinations between Al-Khair cultivar and seeding rate of 140 and 160 kg.ha-1 gave highest average of protein yield of 416.11 and 417.31 kg.ha-1 respectively.