Record Details

Genotypic Variation in Photosynthetic Traits, Grain Yield and Nitrogen Use Efficiency in Rice (Oryza sativa L.) Under Differential Nitrogen Levels

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Genotypic Variation in Photosynthetic Traits, Grain Yield and Nitrogen Use Efficiency in Rice (Oryza sativa L.) Under Differential Nitrogen Levels
 
Creator 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
 
Subject Rice, nitrogen, photosynthetic rate, grain yield, NUE.
 
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%).
 
Date 2024-04-20T12:30:18Z
2024-04-20T12:30:18Z
2023-05-23
 
Type Article
 
Identifier 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.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/82249
 
Language English
 
Relation Not Available;
 
Publisher SAAR