2024, Vol. 7, Issue 4, Part D

author(s)
Manoj Kumar, Partap Singh and Jitendra Kumar Malik

abstract
The present investigation was carried out at Research Farm of Department of Agronomy, Monad University during Rabi seasons 2022-2023 and 2023-2024. In order to standardize the suitable treatment of Black mustard (Brassica nigra (L.)) cv. Rohani, the sources of nitrogen, phosphorus, potassium and sulphur were Urea, DAP, MOP and elemental sulphur. The rest half nitrogen was top dressed through urea at one month stage. Bio fertilizers such as RDF (Refuse-derived-fuel), Azotabactor and PSB (Phosphate solubilizing bacteria)applied in the soil as per the treatment just before sowing were replicated thrice with sixteen treatment combinations in a Split plot design (SPD). The present investigation that the present study of black mustard variety Rohani treating with bio and chemical enhanced the Vegetative growth (Plant height(cm), Numbers of primary and secondary branches per plant, Number of leaves, leaf area index (LAI), Dry matter accumulation at 30, 60, 80, 120 DAS) and Floral and Fruiting characters (Days taken to first flower, No of flowers per plants, Days taken to first fruit, Fruit length (mm), Fruit width (mm), Crop growth rate (g/plant/day) and Relative growth rate (g/plant/day)). Observed maximum plant heights (167.50, 167.23 and 167.37 cm), number of leaves per plant (29.91, 29.44 and 29.68),leaf area (516.91, 513.44 and 515.18 cm²),leaf area index (0.57, 0.57 and 0.57), number of branches (6.89, 6.84 and 6.87), earliest flowering (60.94, 60.80 and 60.87 days),highest number of flowers per plants (647.94, 647.80 and 647.87) and maximum Crop Growth Rate (17.67, 14.97 and 16.32) in T₁₅ (100% RDF+ Azotobacter + PSB), at 120 DAS for the years 2022-23, 2023-24 and pooled respectively. So, the amelioration of soil condition and yield potentiality can achieve by applying combination of bio and chemical fertilizers rather than only chemical fertilizers. This research elucidates the efficacy of different fertilizers’ (Bio and Chemical) application on growth attributes, yield potentialand oil quality of mustard which encourages farmers to adopt the combined application of Bio and Chemical fertilizers to increase the yield and quality of crops.