The effect of plant density on the growth and yield of three cultivars of barley

A field experiment was carried out in Bir Arjam area east of Suluq during the agricultural season 2018/2019 in order to know the effect of plant densities on the growth and yield of three cultivars of barley crop. The study was carried out with the design of split plot with four replicates in which cultivars (Rihan, Safet-65, Mebsher-4), were assigned to main plots and Seeding rates (70, 100, 130) kg seeds/ha to sub plots. The experimental unit area was 8 m2. All agricultural operations were carried out according to the regulations used in the region to produce the barley crop. Planting took place in mid-November. As for nitrogen fertilizer, it was added at a rate of 135 kg N/ha in two batches, half the amount when planting and the remaining half at the branching stage. The increase in plant density led to an increase in plant height, the higher density gave the highest height 75.78 cm, and the highest cereal yield was 3.156 t/ha. The highest protein content was 7.911%. While the cultivar (Safet-65) was given the highest number of spikes 308.8 spike/m2 and the highest weight of cereal yield was 3.289 tons/hectare, whereas the highest protein content in cereals for the variety Mebsher-4 was 8.156%.