Effect of Graded Levels of Phosphorus & Phosphorus Solubilizing Microorganisms on Growth and Yield of Green Gram (Vigna radiata L.)

The present investigation entitled "Effect of Graded Levels of Phosphorus and Phosphorus Solubilizing Microorganisms on Growth and Yield of Green gram" during kharif season of the year, 2022-2023 at the research farm of the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Latur. The experiment was layout in FRBD with three replications and a recommended variety of green gram BM 2003-2 as a test crop along with twelve treatments. The results in nutshell indicated that the growth and yield were significantly influenced by the application of 125% RDP, combined with Aspergillus awamori. The growth parameters viz., plant height, number of leaves & no. of nodules plant-1, significantly increased with application of 125 % RDP, combined with Aspergillus awamori. The combined approach of incorporating phosphate-solubilizing microorganisms, particularly Aspergillus awamori, with the application of 125% RDP, resulted in a noteworthy increase in the availability of nitrogen (N), phosphorus (P), and potassium (K) in the soil. This improvement was attributed to the enhanced solubilization of inorganic phosphorus and the secretion of organic acids, which facilitated an increase in the content of other essential nutrients in the soil. The nutrient content in both grain and straw exhibited significant increases due to seed inoculation with Aspergillus awamori in conjunction with the application of 125%RDP. This approach outperformed treatments involving Tricoderma viridae and Bacillus megaterium in combination with 100% RDP, and the control. The incorporation of phosphate-solubilizing microorganisms, particularly Aspergillus awamori, alongside the application of 125% RDP, proved to be significantly more effective than treatments involving a Tricoderma viridae with 100% RDP, as well as the control.