Deficits irrigation effects on seed yield and yield components of barley cultivars

ABSTRACT: In order to determine seed yield, biological yield and harvest index of barley ,s cultivars in different treatments of drought stress, an experiment was conducted as a split plot arrangement based on randomized complete block design with 4 replications at experimental agriculture farm of Islamic Azad University, Khorasgan (Esfahan) branch, in Esfahan. Irrigation treatments as a main plot were arranged on the basis of evaporation from pan evaporation (including irrigation after 80, 100 and 120 mm evaporation from pan), and sub plots were included 4 cultivars (Fasih, Nosrat, Reihan 03 and Yosef). The irrigation was done normally from plantation until the beginning of reproductive stage. Irrigation had significant influence on total number of tiller per plant, plant height, the number of spike per m2, the number of seed per spike, a thousand seed weight, seed yield, biological yield and harvest index. Cultivar also had significant influence on all these experimental characteristics expect of total number of tiller per plant. Interaction between irrigation and cultivar had significant influence on plant height, the number of seed per spike and harvest index. The highest number of spike per m2, the number of seed per spike, a thousand seed weight, biological yield and harvest index was obtained in irrigation on the basis of 80 mm evaporation from evaporation pan. Reihan 03 also had obtained the maximum number of spike per m2, seed yield and harvest index. It seems that cultivation of Reihan 03 and irrigation on the basis of 80 mm evaporation from evaporation pan is suitable for this region.