Study of effects of end-season drought stress on biological yield and harvest index of irrigated barely lines in moderate regions of Kermanshah province

Abstract

A research was done in order to study the effects of late-season drought stress on yield and yield components of irrigated barely lines with 2 factors of genotype and drought stress in the form of split plot test in the format of complete random blocks with 3 repetition in Islamabad-e Gharb Station (Kermanshah province).For 9 levels of lines MBD-85-3, MBD-85-6, MBD-85-8, MBD-85-14, MB-85-3, MB-85-5,MB-85-18 and 2 control cultivars Yosuf (D5) and Nosrat, drought stress and genotypes were considered as major and minor factors, respectively. Each plot was set at a 12-m2 area (each ridge 60 cm). Plant density was set at 400 seeds/m2 with 4-5 cm planting depth. Seeding was performed by winter Schneider test seeder with sprinkler irrigation. Soil test determined the amount and type of fertilizer to be used. Results of variance analysis indicated that the difference among cultivars in terms of biological yield became significant at 5% probability level, that no significant difference was observed among irrigation levels, but cultivar × irrigation interaction was significant at 5% probability level. Also, the results showed that the difference among cultivar in terms of harvest index became significant at 5% probability level while it became significant at 1% probability level for irrigation levels, and cultivar × irrigation interaction was significant at 5% probability level.