Effect of Rhizobium and Phosphate Solubilizing Bacteria at different levels of Phosphorus applied on Nodulation, Growth and Yield of Peas (Pisum Sativum)
By: Kulsoom Abid, Tariq Sultan, Muhammad Zahid Kiani, Shahbaz Ahmad, Tauseef Tabassam, Mahmood-ul-Hassan
Key Words: Rhizobium, Phosphate Solubilizing Bacteria, Peas
Int. J. Biosci. 8(5), 112-121, May 2016.
Bacterial inoculation of Rhizobium species tend to improve the root architecture of legume crop through their potential of colonization and nitrogen fixing ability. Co-inoculation of Rhizobium and phosphate solubilizing bacteria (PSB) strain will further improve the nutrient availability to plant. This study was conducted to evaluate the response of peas to Rhizobium and PSB inoculation individually and together at 20 and 40 mg kg-1 phosphorus (P) application in-vitro and pot culture experiment. Recommended fertilizer dose was an additional treatment. The co-inoculation of Rhizobium + PSB at 40 mg P kg-1 soil significantly increased shoot and root length, number of flowers, pod, and nodules per plant, root and shoot dry weight, 100 grain weight and number of grains per pod up to 37, 25, 60, 220, 25, 125, 34, 19 and 20%, respectively over 20 mg kg-1 P application. Similarly, N and P concentration of straw and grain as well as soil N and P contents after harvesting was also significantly increase by the co-inoculation of nitrogen fixing and PSB compared to single inoculation at 20 mg kg-1 P application. Results showed that co-inoculation at 20 and 40 mg kg P application can improve the nodulation, growth parameters, yield and nutrient concentrations and uptake.