Diurnal variation of radiation components at three major phenological stages of Boro and Kharif rice under different management practices in West Bengal
DOI:
https://doi.org/10.54386/jam.v27i2.2774Keywords:
Diurnal variation, Photosynthetically active radiation (PAR), Albedo, APAR, IPAR, Boro and Kharif seasonsAbstract
Present study quantifies and compares the diurnal variation of four components of PAR (APAR, IPAR, crop and soil albedo) and net radiation across three key phenological stages for Boro and Kharif rice under different management practices. Two consecutive field experiments were conducted during 2018 and 2019 at the D Block farm of Bidhan Chandra Krishi Viswavidyalaya, considering 18 treatment combinations of three rice varieties, three spacing and two seedling ages. Weekly observations were taken six times in a day with two hours interval. Results indicated that the maximum values of IPAR (93.53% and 82.62%) were recorded in Triguna variety and minimum value (90.02% and 78.62%) in Heera variety during the reproductive and vegetative stage at 11:30 AM and 5:30 PM respectively in Boro season but it reduced by 7-8% in the Kharif season indicating the influence of cloudy weather. Boro rice consumes the maximum amount of net radiation (689.32 W/m2) in reproductive stage followed by 649.22 W m-2 in vegetative and 549.22 W m-2 in ripening stages for Triguna variety whereas Heera consumes lesser amount (489.23 to 600.22 W m-2), which is significantly lesser in Kharif season. The study concluded that components of PAR and net radiation vary significantly across phenological stages, spacing and varieties while the ages of seedling (only 7 days difference) remain relatively unaffected.
References
Aggarwal, Navneet, Avtar Singh, and Som Pal Singh. (2016). Heat utilization and radiation interception in transplanted rice (Oryza sativa L.) in relation to seedling age. J. Agrometeorol., 18(1): 93–96. https://doi.org/10.54386/jam.v18i1.908
Bhattacharya, M., Bera, N., Khan, D.K., Nanda, M.K., Das, L., Alipatra, A., Mondal, J., Banerjee, H., and Pal, S., (2012): Estimation of radiation and energy balance in rice field under new alluvial zone of West Bengal, J. Agrometeorol., 14(Special issue): 532-536.
Dhaliwal, L. K., Hundal, S. S., Kular, J. S., Chahal, S. K., and Aneja, A. (2007). Radiation interception, growth dynamics and agroclimatic indices in Raya (Brassica juncea). J. Agrometeorol., 9(2): 242-246. https://doi.org/10.54386/jam.v9i2.1137
Gallo, K. P., and Daughtry, C. S. T. (1986). Techniques for measuring intercepted and absorbed Photosynthetically Active Radiation in Corn Canopies 1. Agron. J., 78(4): 752-756.
Goswami, B., Bhattacharya, B. K., and Chakraborty, D. (2021). Modelling radiation interception and its effect on rice yield under varied climatic conditions. Agric. For. Meteorol., 301: 108354.
Kar, Gouranga and Ashwani Kumar. (2022). Forecasting rainfed rice yield with biomass of early phenophases, peak intercepted PAR and ground based remotely sensed vegetation indices. J. Agrometeorol., 16(1): 94–103. https://doi.org/10.54386/jam.v16i1.1492
Kumar, S., Gupta, N., and Sinha, P. (2022). Albedo variation in rice fields and its influence on microclimatic conditions. Int. J. Biometeorol., 66: 1235-1247.
Monteith, J. L., and Unsworth, M. H. (2013). Transport of heat, mass, and momentum. Princ. Environ. Phys., 25-35.
Rao, V. P., Meena, R. S., and Das, A. (2017). Effect of intercepted radiation on growth and development of different rice varieties under monsoonal variations. Indian J. Agric. Sci., 87(8): 1002-1009.
Sharma, P., Kumar, A., and Pandey, R. (2019). Photosynthetically active radiation and its role in rice yield enhancement. Field Crops Res., 238: 85-92.
Sivakumar, Mannava (2023). Importance of solar radiation and the need for improved respect to Sun by Agrometeorologists. J. Agrometeorol., 25(1): 51–60. https://doi.org/10.54386/jam.v25i1.1971
Xing, Z. P., Pei, W. U., Ming, Z. H. U., Qian, H. J., Hu, Y. J., Guo, B. W., ... and Zhang, H. C. (2017). Temperature and solar radiation utilization of rice for yield formation with different mechanized planting methods in the lower reaches of the Yangtze River, China. J. Integr. Agric., 16(9): 1923-1935.
Downloads
Published
How to Cite
Issue
Section
Categories
License
Copyright (c) 2025 SHIRSANTA THAKUR, LALU DAS, SACHIN MUNDHE

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This is a human-readable summary of (and not a substitute for) the license. Disclaimer.
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
NonCommercial — You may not use the material for commercial purposes.
ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.