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Vol. 12, Issue 11 (2024)

Effect of different levels of Nitrogen on SPAD readings and yield in rice (Oryza sativa L.) varieties

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. The present investigation the SPAD reading increased with the increase in the N application rates. Higher SPAD readings were recorded at tillering stage, panicle initiation and flowering stage. Among the varieties NDLR-7 (V2) recorded significantly higher SPAD readings (30.40) compared to BPT 5204 (29.4) (V1). However, SPAD reading of BPT 5204 and NLR 34449 is on par. This variety also recorded higher number 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). With increasing 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.
Pages: 2432-2435  |  140 Views  78 Downloads


The Pharma Innovation Journal
How to cite this article:
D Venkatesh Babu, Dr. P Sudhakar, Dr. B Srikanth, Dr. M Srinivasa Reddy, Dr. Ch. Barghava Rami Reddy. Effect of different levels of Nitrogen on SPAD readings and yield in rice (Oryza sativa L.) varieties. Pharma Innovation 2024;12(11):2432-2435.

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