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http://krishi.icar.gov.in/jspui/handle/123456789/82249
Title: | Genotypic Variation in Photosynthetic Traits, Grain Yield and Nitrogen Use Efficiency in Rice (Oryza sativa L.) Under Differential Nitrogen Levels |
Authors: | Not Available V Jaldhani, B Srikanth, K Suman, S Malathi, T Vishnukiran, CN Neeraja, D Subrahmanyam, Sanjeeva Rao, U Chaitanya, K Ramulu, P Senguttuvel, MS Anantha, SV Sai Prasad, RM Sundaram, PR Rao |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Institute of Rice Research |
Published/ Complete Date: | 2023-05-23 |
Keywords: | Rice, nitrogen, photosynthetic rate, grain yield, NUE. |
Publisher: | SAAR |
Citation: | Jaldhani V, Srikanth B, Suman K, Malathi S, Vishnukiran T, Neeraja CN, Subrahmanyam D, Sanjeeva Rao D, Chaitanya U, Ramulu K, Senguttuvel P, Anantha MS, Sai Prasad SV, Sundaram RM, Rao PR. 2023. Genotypic Variation in Photosynthetic Traits, Grain Yield and Nitrogen Use Efficiency in Rice (Oryza sativa L.) Under Differential Nitrogen Levels. Journal of Rice Research 2023, Vol 16, No. 1 . 78-91. |
Series/Report no.: | Not Available; |
Abstract/Description: | Nitrogen (N) is one of the yield limiting nutrients for rice. Unwarranted usage of N fertilizer to achieve higher crop returns is affecting environment and increasing the cost of cultivation. A field experiment was conducted under two differential N experimental plots (N-Low and N-Rec) to evaluate the effect of N on photosynthesis, grain yield and nitrogen use efficiency (NUE) of six rice genotypes belonging to three diverse groups. At N-Rec, Kolajoha3 exhibited highest mean SCMR value (43.2), flag leaf length (39.0 cm), flag leaf width (1.77 cm), flag leaf area (53.8 cm2), photosynthetic rate (19.50 µmol CO2 m-2 s-1), stomatal conductance (0.38 mol [H2 O] m-2 s-1), transpiration rate (10.72 mmol [H2 O] m-2 s-1). IC463254 recorded highest mean grain yield (621.5 g m-2), total dry matter (1302.5 g m-2), harvest index (47.7%), grain N uptake (84.4 kg ha-1) and nitrogen use efficiency (18.2). Significant reduction in growth, photosynthetic rate and yield of rice occurred under N-Low compared with N-Rec. In comparison N-Rec, Kolajoha3 exhibited least mean reduction in plant height (10.68%), photosynthetic rate (14.96%), productive tiller number (35.40%), grain yield (50.63%), straw yield (24.83%), total dry matter (36.03%), agronomic efficiency (14.6%) and NUE (26.21%) under N-Low, while IC463254 exhibited least mean reduction in SCMR value (14.11%) and flag leaf width (23.66%). |
ISSN: | Not Available |
Type(s) of content: | Article |
Language: | English |
Name of Journal: | Journal of Rice Research |
NAAS Rating: | 4 |
Volume No.: | 16 |
Page Number: | 78-91 |
Source, DOI or any other URL: | https://doi.org/10.58297/USZC7294 |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/82249 |
Appears in Collections: | CS-IIRR-Publication |
Files in This Item:
File | Description | Size | Format | |
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2023 Jaldhani V et al 2023_JRR.pdf | 660.23 kB | Adobe PDF | View/Open |
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