SAIKAT SARKAR, DEVENDRA SINGH, GANGADHAR NANDA, SUNIL KUMAR, SANTOSH KUMAR SINGH AND HRISHIKESH NATH
Department of Agronomy, PG College of Agriculture, RPCAU, Pusa-848125 (Bihar), India
Department of Soil Science, PG College of Agriculture, RPCAU, Pusa-848125 (Bihar), India
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(Received : 10 October 2022; Accepted : 27 December 2022)
A field experiment was conducted at the Forage Research Block of Cattle Farm, Animal Production Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar to study the impact of various genotypes under varying nitrogen levels on growth and yield of fodder oat (Avena sativa L.). The experiment was conducted in split plot design with six genotypes in main plots (Kent, JO-07-28, OS-403, OS-6, HFO-904 and HFO-906) and three nitrogen levels (40, 80, and 120 kg ha-1) in sub-plots with three replications. Results revealed that growth attributes, i.e., plant height (163.3 cm) of HFO-906, number of tillers (122.3) of HFO-904, dry matter accumulation (219.2 g) of JO-07-28, SPAD reading (46.6) of Kent and number of green leaves (3.7) of Kent, JO-07-28 and HFO-904, were found to be higher over the rest of the genotypes. Genotype JO-07-28 outperformed the other genotypes in terms of green fodder yield (39.6 t/ha) and dry matter yield (8.8 t/ha). The leaf to stem ratio was recorded as significantly higher in HFO-904 (0.49) than in the remaining genotypes. Result indicated that plant height, number of tillers per meter row length, dry matter accumulation, and SPAD reading were recorded highest with the application of 120 kg N/ha, which were statistically at par with the application of 80 kg N/ha, except in SPAD reading. Maximum green fodder (37.1 t/ha) and dry matter yield (9.1 t/ha) and leaf to stem ratio (0.41) were registered at 120 kg N/ha, which were statistically on par with the application of 80 kg N/ha.
Key words: Genotypes, nitrogen levels, fodder oat, growth, yield