On-farm evaluation of Rhizoibia inoculants on Faba Bean (Vicia faba L.) at bulie and Chencha weredas in Southern Ethiopia.
2008
Wassie Haile;Teshome Kebede;Shiferaw Boke and Asfaw Hailemariam(Researchers)
Inoculation of legumes such as faba bean with effective rhizobia strains (symbiotic nitrogen-fixing bacteria) improve their nitrogen-fixing ability and increase yield. Cognizance of this fact this fact led to an experiment conducted on sites in Bulie and Chencha weredas located in southern Ethiopia. The aim was to evaluate the effect of rhizobia inoculants in improving the yield of faba bean (vicia faba L.) for two seasons. The treatments were rhizobia strains EAL-110, ELL-120, a chemical fertilizer (urea) and untreated control. Faba bean variety CS20DK was inoculated with peat-based rhizobia just before planting. The experiment was laid out in RCB design replicated across four farmers' fields per location. Data on plant height, nodule number, nodule dry weight and yield were collected and subjected to statistical analysis. The result revealed that both inoculants strains and chemical fertilizer significantly (P0.01) improved the grain yield and other parameters compared to the control in both locations across two seasons. Rhizobia strains EAL-110, EAL-120 and chemical fertilizer increased grain yield by 61, 68 and 80%, respectively, over the control at Bulie. The corresponding increase at Chencha was 52, 52 and 35%, respectively. Season had no effect on grain and straw yields and on other parameters of faba bean at Bulie. However, at Chencha, significantly higher grain and straw yields. Higher yield was obtained at Bulie which indicates better soil quality there. Location and season by treatment interactions were not significant. It is concluded that inoculant strains produced superior yield and yield components of faba bean compared to the control. Inoculant strains also produced comparable result to that of chemical fertilizer. Rhizobia strains or inoculants performed better at Bulie. Than at Chencha location.
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