Effect of growth promoting rhizobacteria and chemical fertilizer on yield and malting efficiency of different barley cultivars in rainfed conditions

An experiment was conducted to evaluate the effect of growth-promoting rhizobacteria and chemichal fertilizer; on yield and malting efficiency of different barley cultivars in rainfed conditions in 2018 and 2019. A faceorial experiment was conducted on a randomized complete blocks desibn (RCBD) with four replications in Ilam province.  Three cultivars: Behrokh, Grace, and Sararoud as first and eight levels of seed insemination with growth-promoting bacteria and Fertilizer (including control, i.e., seed without bacterial insemination and without fertilizer, complete fertilizer Pseudomonas bacteria, Bacillus bacteria, combination of Pseudomonas and Bacillus bacteria, Pseudomonas bacteria + half fertilizer Urea, Bacillus bacteria + half fertilizer and combination of Pseudomonas and Bacillus bacteria + half fertilizer) were second factor. The results of the combined analysis of variance showed that all the studied traits (except malting efficiency) significantly affected by main effects and interaction of year×cultivar×fertilizer treatment. But malting efficiency influenced by interaction of cultivar×fertilizer treatments. Number of seeds per spike, number of spikes per area unit and grain yield in combination of Pseudomonas and Bacillus bacteria + half fertilizer, had the highest mean in garis cultivar in the two years. Additionally, maximum malting efficiency (95.5 %) was observed in the combination of Pseudomonas and Bacillus bacteria + half fertilizer in Behrokh. The highest amount of grain protein in the first year was observed in bacterial combination + half fertilizer in Saravard cultivar (14.6%) and in the second year was observed in the Pseudomonas + half fertilizer in Saravard cultivar (14.3%).