Document Type : Research Paper


1 Associate professor, Soil Science department, Agriculture of Faculty, Vali-e-Asr University of Rafsanjan.

2 M.Sc. Graduate of Soil Science Department, Vali-e-Asr University of Rafsanjan.


To study the effect of vermicompost and plant growth promoting rhizobacteria (PGPR) on yield indices, oil and protein percent and elements concentration of seed in sesame (Sesamum indicum L.), a greenhouse experiment was conducted in factorial based on completely randomized design with four replications at Vali-e-Asr university of Rafsanjan in 2014. Experiment factors included four levels of vermicompost (zero (V0), 1 (V1), 2 (V2) and 4 (V3) percent) and five bacterial levels (without bacteria (B0), inoculation with an isolate from fluorescent pseudomonads group, having ability to dissolve inorganic phosphate (B1), Azospirillum sp. (B2), Azotobacter sp. (B3) with ability to fix nitrogen and a mixture of three bacteria (B4). The results showed that the application of vermicompost and PGPR each one alone, significantly increased oil percent (up to %80.7 and %15.4 respectively), potassium, iron and manganese concentration in seed sesame. Also, simultaneous application of vermicompost and PGPR were significantly enhanced number and weight of seeds, number and weight of Capsule, protein of seed and concentration of nitrogen, phosphorous and copper in seed sesame. In general, the combined application of vermicompost and growth-promoting bacteria, through a synergistic relationship, increased the yield and the content of mineral elements of sesame seeds.