Shukla, AnilSarvadamana, Arya Kumar2022-09-222022-09-222022-06https://krishikosh.egranth.ac.in/handle/1/5810188010Field experiments were conducted during the rabi season at N. E. Borlaug Crop Research Centre of GBPUAT, Pantnagar (290 N, 79029E and at an altitude of 243.83 m) to study the effect of nitrogen schedules, coupled with zinc and boron fertilizations on growth parameters, yield attributes, yield, quality, energy balance and economics of Indian mustard. The experiment consisting of 12 treatments (T1: N @ 30, 30, 30, 30 Kg/ha at 15, 30, 45, 60 DAS respectively, T2: N @ 30, 30, 30Kg/ha at 15, 30, 45 DAS respectively, T3: N @ 30, 60, 30Kg/ha at 15, 30, 45 DAS respectively, T4: N @ 30, 30, 30, 30 Kg/ha at 0, 15, 30, 45 DAS respectively, T5: N @ 30, 30, 30 Kg/ha at 0, 15, 30 DAS respectively, T6 : T1+Zn+B, T7: T2+Zn+B, T8: T3+Zn+B, T9: T4+Zn+B, T10: T5+Zn+B, T11: RDF (NPK), T12: RDF(NPK)+ Zn+ B was laid out in Randomized Complete Block Design (RCBD) taking three replications. The plant height, dry matter per plant at various growth stages, the number of branches per plant, and the number of siliquae per plant remained significantly higher in T8 (N @ 30, 60, 30 Kg/ha at 15, 30, 45DAS respectively+ Zn+ B). The Fv/Fm value did not differ significantly among the various treatments during both the year of study. The activity of urease and dehydrogenase enzymes increased according to the nitrogen dose applied just before recording the observation. Yield attributes like the number of siliquae per plant and number of seeds per siliqua increased significantly with application of Zn @ 5 Kg and B @ 1 Kg per ha. The seed, biological and oil yields were significantly more in T8 during both the years of study. The fatty acid profile and glucosinolate contents in seed did not differ significantly among the various treatments during both the years of study. T7 (N @ 30, 30, 30Kg/ha at 15, 30, 45 DAS respectively + Zn + B) was found to be the most energy efficient treatment. The results of the field trials revealed that the application of nitrogen in three splits i.e., 30, 60 and 30 kg/ha at 15, 30 and 45 DAS coupled with Zn and B improved growth parameters, yield attributes, yield, nutrient uptake and economic return of Indian mustard, and shall be recommended against the traditional nutrient management practiced by the farming community.EnglishThesis