Vol. 12, Issue 3 (2023)

Author(s):
Shovana Nayak, Susanta Kumar Swain, Manoranjan Satapathy and Subhrasini Lenka

Abstract:
A field experiment was conducted at the Groundnut Research Station, Odisha University of Agriculture and Technology, Bhubaneswar to study the effect of phosphorus level, FYM and phosphorus solubilising bacteria on growth, yield attributes, yield and economics of summer groundnut (Arachis hypogaea L.) during 2018-19. The soil of the experimental site was sandy loam in texture, acidic in reaction, low in organic carbon and available nitrogen, medium in available phosphorus and potassium. The experiment was laid out in a randomized block design (RBD) with three replications and ten different nutrient management practices to groundnut, viz. T₁: Control (no application of phosphorus), T₂: Phosphorus @ 20 kg ha^-1, T₃: Phosphorus @ 40 kg ha^-1, T₄: Phosphorus @ 60 kg ha^-1, T₅: FYM @ 2.5 t ha^-1, T₆: Phosphorus @ 20 kg ha^-1 + PSB seed inoculation 20 g ha^-1, T₇: Phosphorus @ 40 kg ha^-1 + PSB seed inoculation 20 g kg^-1, T₈: Phosphorus @ 60 kg ha^-1+ PSB seed inoculation 20 g kg^-1, T₉: FYM @ 2.5 t ha^-1+ PSB seed inoculation 20 g kg^-1, T₁₀: Enriched FYM @ 100 kg ha^-1+ PSB seed inoculation 20 g kg^-1 with uniform application of recommended dose of 20 kg N and 40 kg K2O per hectare. Groundnut variety ‘Dharani’ was used as the test material. Application of Phosphorus @ 60 kg ha^-1 + PSB seed treatment @ 20 g kg^-1 recorded significantly maximum plant height, dry matter accumulation at harvest and maximum LAI at 90 DAS. The same treatment also recored higher growth parameters like pods/plant, shelling percentage and 100- kernel weight. Maximum pod yield of 2190 kg/ha and haulm yield of 3878 kg/ha were recorded with combined application of Phosphorus @ 60 kg ha^-1 + PSB seed treatment @ 20 g kg^-1 which were about 38 and 30% higher, respectively from the production received without application of phosphorus and PSB seed treatment. Highest net return of Rs. 96,109 ha^-1 and return per rupees invested of 2.16 were obtained from the groundnut crop fertilized with 60 kg phosphorus ha^-1 along with PSB seed treatment.