1Department of Agronomy, College of Agriculture, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
2Department of Agronomy, College of Agriculture, Sanandaj Branch , Islamic Azad University, Sanandaj, Iran
Objective: To evaluate the effects of bacteria and vermicompost on phenology and growth of soybean trial an experiment was conducted as split plot in a completely randomized block design with three replications. Methods: Main plots of experiment at two levels included the non-use and the use of bacteria and the subplots at three levels included the non-use of vermicompost (control), the use of 5 tons of vermicompost per acre and the use of 10 tons of vermicompost per acre. Results: The results showed that the treatment including 10 tons of vermicompost had the highest amount of the days to full maturity with the amount of 153 days and the treatment of non-use of vermicompost had the lowest amount of the days to full maturity. Also, the highest amount of SFP was obtained from the treatment including the use of vermicompost at the rate of 10 tons per acre that increasing the seed growing and filling period led to obtain the highest amount of seed yield with the amount of 1699 kg ha while the lowest amount of seed yield was obtained from the treatment including non-use of vermicompost with the amount of 1419 kg ha. The use of bacteria compared with non-use of it led to obtain the highest amount of seed yield with the amount of 1636 kg ha while non-use of bacteria had the lowest amount of seed yield with the amount of 1443 kg ha. Also, the results obtained from the analysis of variance showed that the effects of using vermicompost on the stem diameter, plant height, and days to pod at the level of 1% and on the days to flowering, days to full maturity and seed yield at the 5% level were significant.