| Abstract: | A field experiment in silty clay soil was carried out to evaluate the effect of dual inoculation with Rhizobium japonicum and phosphate dissolving bacteria (PDB) on nitrogen and phosphorus uptakes as well as seed yield of soybean. Seed inoculation with PDB before planting did not induce marked enrichment of PDB counts in the rhizosphere. Inoculation with R. japonicum alone increased the dry weight, N-uptake and seed yield significantly. Further significant increases in P-uptake and seed yield were recorded by inoculation with rhizobia and fertilization with superphosphate. However, the inoculation with PDB in combination with R. japonicum in the presence of rock phosphate or superphosphate did not show significant increases in dry weight, N and P uptakes or seed yield as compared with the treatments inoculated with rhizobia alone. |
