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Research Article Open access CC BY 4.0

Impact of Site Specific Nitrogen Management on Growth Parameters, Productivity and Profitability of Kharif rice

S. Sahoo, B. K. Mohapatra, R. K. Paikaray, S. N. Jena, B. S. Rath, S. Biswal, R. K. Panda, K. N. Mishra, S. Dwibedi, A. K. Nayak, R. R. Mahanta, T. P. Das, Nishith Das

International Journal of Environment and Climate Change · pp. 1921–1930 · Published 31 Dec 2022

10.9734/ijecc/2022/v12i122117

Abstract

A field experiment was carried out during kharif 2021 (June-November) and 2022 (June-November) at the Agronomy Main Research Farm, Department of Agronomy, College of Agriculture, OUAT, Bhubaneswar. The experiment was laid out in randomized complete block design with twelve treatments i.e. T1-RDF (80:40:40 kg N:P2O5:K2O ha-1), T2 - 20 kg N ha-1 at LCC score <4 with no basal N, T3 - 20 kg N ha-1 at LCC score <4 with 20 kg N ha-1 at basal, T4 - 20 g N ha-1 at SPAD value <35 with no basal N, T5- 20 kg N ha-1 at SPAD value <35 with 20 kg N ha-1 at basal, T6- 20 kg N ha-1 at Green seeker (GS) >1.25 RI with no basal N, T7- 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal, T8- 150 kg N ha-1 (N rich strip plot), T9- N omission plot, T10- STBN, T11- INM (20 kg N ha-1 as FYM at basal + 40 kg N ha-1 at tillering + 20 kg N ha-1 at PI stage), T12- Organic nutrient (FYM 10t ha-1 at basal + 2t ha-1 VC top dressing). Pooled analysis revealed that application of 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal recorded maximum dry matter accumulation (1194.1 g m-2), larger leaf area index (3.30), highest number of tillers (381 m-2) at harvest and maximum CGR of 18.73 g m-2 day-1 during 60 to 80 DAT followed by the treatment receiving 20 Kg N ha-1 at SPAD value <35 with 20 Kg N ha-1 at basal. Combined analysis of both years showed that application of 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal recorded significantly higher grain yield (5.68 t ha-1), straw yield (6.57 t ha-1) and harvest index (47 %) with maximum net return 55982 Rs ha-1 and B:C ratio 1.82.

LCC SPAD green seeker CGR productivity profitability

References (7)

  1. 1 Comparative Physiological Studies on the Growth of Field Crops: I. Variation in Net Assimilation Rate and Leaf Area between Species and Varieties, and within and between Years [DOI]
  2. 2 World Food and Agriculture – Statistical Yearbook 2022 [DOI]
  3. 3 Recent Advances in Agronomic and Physio-Molecular Approaches for Improving Nitrogen Use Efficiency in Crop Plants [DOI]
  4. 4 International Journal of Current Microbiology and Applied Sciences [DOI]
  5. 5 Journal of the science of food and agriculture [DOI]
  6. 6 Communications in Soil Science and Plant Analysis.
  7. 7 International Journal of Agriculture Environment and Biotechnology [DOI]

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SHAHIN IMRAN, MD ASIF MAHAMUD, RAKIBUL HASAN MD RABBI · The Indian Journal of Agricultural Sciences · 2025

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