Effect of different planting geometry and nitrogen levels on growth and yield of rice crop (Oryza sativa L.)

A field experiment was conducted during kharif 2020 at research farm of College of Agriculture, Kaul (Kaithal) of CCS Haryana Agricultural University, Hisar to investigate the response of transplanted rice (Oryza sativa L.) to nitrogen levels and planting geometry in rice variety HKR-128. The experiment was laid out in RBD factorial design consisting of three planting geometry i.e. 20cm x 15 cm,20 cm x 20 cm, and random transplanting as main plot treatments and five different levels of nitrogen (0, 50,100,150, and 200 kg/ha) in sub-plots with three replications. Plants attained significantly higher plant height, tillers and dry matter under 20 cm x 15 cm than other two planting geometry at all the growth stages. Number of panicles/m² and grains/panicle were significantly higher in 20 cm x 15 cm planting geometry as compared to other two planting geometry but panicle length and 1000-grain weight was not affected by planting geometry. Grain yield was recorded significantly higher in 20 cm x 15 cm planting geometry as compared to other plant spacing. Plant height, no. of tillers/m² and dry matter accumulation/m² enhanced significantly with successive increase in nitrogen dose up to 200 kg/ha, which was at par with 150 kg N/ha. Various yield attributing characters such as number of panicles/m², number of grains per panicle were significantly improved up to 200 kg N/ha being atpar with 150 kg /ha.