The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal
The Nepalese Sunsari Morang Irrigation district is the lifeblood of millions of people in the Koshi River basin. Despite its fundamental importance to food security, little is known about the impacts of climate change on future irrigation demand and grain yields in this region. Here, we examined the...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/125137 |
| _version_ | 1855516661648457728 |
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| author | Kaini, S. Harrison, M.T. Gardner, T. Nepal, Santosh Sharma, A. K. |
| author_browse | Gardner, T. Harrison, M.T. Kaini, S. Nepal, Santosh Sharma, A. K. |
| author_facet | Kaini, S. Harrison, M.T. Gardner, T. Nepal, Santosh Sharma, A. K. |
| author_sort | Kaini, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The Nepalese Sunsari Morang Irrigation district is the lifeblood of millions of people in the Koshi River basin. Despite its fundamental importance to food security, little is known about the impacts of climate change on future irrigation demand and grain yields in this region. Here, we examined the impacts of climate change on the irrigation demand and grain yield of wheat crop. Climate change was simulated using Representative Concentration Pathways (RCPs) of 4.5 and 8.5 for three time horizons (2016–2045, 2036–2065, and 2071–2100) in the Agricultural Production Systems Simulator (APSIM). For the field data’s measured period (2018–2020), we showed that farmers applied only 25% of the irrigation water required to achieve the maximum potential grain yield. Actual yields were less than 50% of the potential yields. Projected irrigation water demand is likely to increase for RCP4.5 (3%) but likely to decrease under RCP8.5 (8%) due to the truncated crop duration and lower maturity biomass by the end of the 21st century. However, simulated yields declined by 20%, suggesting that even irrigation will not be enough to mitigate the severe and detrimental effects of climate change on crop production. While our results herald positive implications for irrigation demand in the region, the implications for regional food security may be dire. |
| format | Journal Article |
| id | CGSpace125137 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1251372025-12-08T10:29:22Z The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal Kaini, S. Harrison, M.T. Gardner, T. Nepal, Santosh Sharma, A. K. climate change irrigation water water demand crop yield biomass wheat cropping systems irrigation schemes irrigation management crop modelling forecasting water requirements extreme weather events farmers biochemistry The Nepalese Sunsari Morang Irrigation district is the lifeblood of millions of people in the Koshi River basin. Despite its fundamental importance to food security, little is known about the impacts of climate change on future irrigation demand and grain yields in this region. Here, we examined the impacts of climate change on the irrigation demand and grain yield of wheat crop. Climate change was simulated using Representative Concentration Pathways (RCPs) of 4.5 and 8.5 for three time horizons (2016–2045, 2036–2065, and 2071–2100) in the Agricultural Production Systems Simulator (APSIM). For the field data’s measured period (2018–2020), we showed that farmers applied only 25% of the irrigation water required to achieve the maximum potential grain yield. Actual yields were less than 50% of the potential yields. Projected irrigation water demand is likely to increase for RCP4.5 (3%) but likely to decrease under RCP8.5 (8%) due to the truncated crop duration and lower maturity biomass by the end of the 21st century. However, simulated yields declined by 20%, suggesting that even irrigation will not be enough to mitigate the severe and detrimental effects of climate change on crop production. While our results herald positive implications for irrigation demand in the region, the implications for regional food security may be dire. 2022-09-01 2022-10-20T11:42:27Z 2022-10-20T11:42:27Z Journal Article https://hdl.handle.net/10568/125137 en Open Access MDPI Kaini, S.; Harrison, M. T.; Gardner, T.; Nepal, Santosh; Sharma, A. K. 2022. The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal. Water, 14(17):2728. (Special issue: How Does Agricultural Water Resources Management Adapt to Climate Change?) [doi: https://doi.org/10.3390/w14172728] |
| spellingShingle | climate change irrigation water water demand crop yield biomass wheat cropping systems irrigation schemes irrigation management crop modelling forecasting water requirements extreme weather events farmers biochemistry Kaini, S. Harrison, M.T. Gardner, T. Nepal, Santosh Sharma, A. K. The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title | The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title_full | The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title_fullStr | The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title_full_unstemmed | The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title_short | The impacts of climate change on the irrigation water demand, grain yield, and biomass yield of wheat crop in Nepal |
| title_sort | impacts of climate change on the irrigation water demand grain yield and biomass yield of wheat crop in nepal |
| topic | climate change irrigation water water demand crop yield biomass wheat cropping systems irrigation schemes irrigation management crop modelling forecasting water requirements extreme weather events farmers biochemistry |
| url | https://hdl.handle.net/10568/125137 |
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