Effects of Phosphate solubilizing bacteria and Phosphorus on growth and yield of Greengram (Vigna radiata L.)

A field experiment was conducted during Zaid Season 2024 to study the “Effects of Phosphate solubilizing bacteria and Phosphorus on growth and yield of Greengram (Vigna radiata L.)” at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P) India. The experiment was laid out in a randomized block design with ten treatments replicated thrice. The treatments consist of Phosphate solubilizing bacteria and Phosphorus along with recommended doses of fertilizers. The experimental field soil was sandy loam in texture, moderately basic in reaction (p H 7.6), available medium organic Carbon (1.149% ) medium in available nitrogen (245.5 kg/ha), and very high accessible phosphorus (38.6 kg/ha) and available potassium (253.4 kg/ha). The treatment details are as follows T1: Control (20:40:20) NPK kg/ha, T2: P2O5 25% + PSB 10 g/kg, T3: P2O5 25% + PSB 20 g/kg, T4: P2O5 25% + PSB 30 g/kg, T5: P2O5 50% + PSB 10 g/kg, T6: P2O5 50% + PSB 20 g/kg, T7: P2O5 50% + PSB 30 g/kg, T8: P2O5 100% + PSB 10 g/kg, T9: P2O5 100%+ PSB 20 g/kg, and T10: P2O5 100%+ PSB 30 g/kg. The result showed that significantly higher growth parameters viz., plant height (57.75 cm), number of nodules/plant (7.63), number of branches/plant (10.77), plant dry weight (7.10 g), pods/plant (11.92), Seed/pod (11.00) and seed yield (1433.86 kg/ha), Test weight (37.19) were recorded with the application of Treatment 6 (P2O5 50% + PSB 20 g/kg). However highest stover yield was recorded in Treatment 8 (P2O5 100% + PSB 10 g/kg). Higher gross return (INR 117395.04/ha), net return (INR 80495.04/ha) and B:C ratio (2.18) were also recorded in Treatment 6 (P2O5 50% + PSB 20 g/kg).