Abstract
A potato cultivar (Desiree) pot inoculation trial was carried out to evaluate an indigenous formulation comprising Azospirillum, Azorhizobium and P-solubilizing Pseudomonas in single, dual and triplicate combination as supplement to chemical fertilizers. The effect on growth and yield indices were compared with full recommended dose of Nitrogen (N) and Phosphorus (P) at NARC, HRI green houses pot experiment during 2009-10. The were, un-inoculated control with starter N and P; Azospirillum with half N and P; Azorhizobium with half N and P; Pseudomonas with full N + half P; Azospirillum + Azorhizobium with half N and half P; Azorhizobium + Pseudomonas with half N and half P; Azospirillum + Pseudomonas half N and half P; Azorhizobium + Azospirillum + Pseudomonas with half N and half P; Full recommended dose N+P. All the inoculated treatments produced significantly higher tuber yield, tuber weight than control (un-inoculated). Triplicate inoculation in the presence of half of recommended dose of N and P, brought 66% increase in tuber yield over control, and it did not differ significantly from that where full dose of recommended N and P was given. The triplicate inoculation saved 50% N and P without compromising on tuber yield.
