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Rice phenology and water requirements in Northwestern Bangladesh in the face of climate change

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Abstract

Global climate change affects agriculture by influencing crop phenology and water requirements. This study aims to understand the effects of climate change on rice phenology and assess the case of the drought-prone Rajshahi district of Bangladesh by exemplary estimation of a climate model-based future crop water requirement. Studies indicate a high possibility of future temperature and humidity increases by the 2050s and 2080s. Increased temperature potentially reduces the length of individual growth stages and total growth stage and, ultimately, the crop water requirement. However, the increased humidity percentage and high temperature may severely affect grain development by causing spikelet sterility. There is a possibility of a considerable reduction in the rain-fed yield of winter rice in the case study area.

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Notes

  1. Aus is a rainfed rice variety and can be both upland (broadcasted) and lowland rice (transplanted) (March/April- July/August).

  2. Aman is also a lowland rice variety grown during monsoon (July to December).

  3. Boro is cold tolerant and irrigation dependent variety and grown where sufficient water retains throughout the growing season (November/January to April/May) (Parsons et al. 1999; Sattar 2000).

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Acknowledgements

The author thanks his supervisor, Dr. ir. Gerardo van Halsema, Water Resources Management (WRM), Department of Environmental Sciences, Wageningen University and Research (WUR), The Netherlands, for his generous support.

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Correspondence to Md. Shariot-Ullah.

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Shariot-Ullah, M., Acharjee, T.K. Rice phenology and water requirements in Northwestern Bangladesh in the face of climate change. Paddy Water Environ 22, 173–188 (2024). https://doi.org/10.1007/s10333-023-00960-8

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  • DOI: https://doi.org/10.1007/s10333-023-00960-8

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