Vol. 11, Issue 10 (2022)

Author(s):
D Venkatesh Babu, Dr. P Sudhakar, Dr. B Srikanth, Dr. M Srinivasa Reddy and Dr. CH Barghava Rami Reddy

Abstract:
An investigation was carried out during Kharif-2019 and Kharif-2020 to study the response of rice varieties on growth and yield parameters under four nitrogen levels (0, 120, 240 and 360 kg N ha^-1) as main treatments and three varieties viz. BPT5204, NDLR-7 and NLR 34449 as sub treatments. In the present investigation among the varieties V2 recoded significantly higher values for growth parameters such as plant height at tillering stage, panicle initiation stage, flowering stage and harvest stage) (35, 70.65, 103.89, 105.65 cm) and higher dry matter per plant at panicle initiation stage, flowering stage (3.17, 5.28, 11.0 g plant^-1) and recorded higher no. of productive tillers (9.50) maximum grain yield 5681.03 kg ha^-1. The interaction effect is significant and higher yield was recorded in the combination of 120 kg N ha^-1 in NDLR-7 (7496.77 kg ha^-1) and lowest grain yield was recorded in the combination of 360 kg N ha^-1 in BPT 5204 (3141.66 kg ha^-1). We concluded that with the increasing the N application dose the varieties response is varied significantly but with the higher dose of N all the varieties recoded lower yields. Hence application of the intermediate level of nitrogen was economical and environment-friendly.