Synergistic Effects of Algal Biofertilizers and Rhizobium on Growth and Nodulation in Soybean(Glycine max L.) Merr

Abstract

Blue-green algae (cyanobacteria), play a vital role in enhancing soil fertility and plant growth through nitrogen fixation and the release of bioactive substances. The present research work was carried out to evaluate the effect of algal biofertilizer (Nostoc commune) alone and in combination with Rhizobium japonicum on the growth, and nodulation of soybean (Glycine max L.) under pot conditions. Results shows that algal inoculation significantly improved various growth parameters such as root length, shoot length, total seedling length, and dry weight compared to the control. The combined application showed a more pronounced effect than individual treatments, indicating a synergistic interaction between cyanobacteria and rhizobia. Increase in nodulation was also observed in combined treatments. The findings suggest that the use of algal biofertilizers, either alone or in combination with rhizobial inoculants, can serve as an effective and eco-friendly alternative to chemical fertilizers.