Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru
The canopy temperature of rice is a critical concern due to rising air temperatures and the increasing risk of heat damage. In this study, we investigated the canopy temperature difference (CTd) and canopy temperature depression (CTD) in the Japonica rice cultivars ‘Himenorin’ (HR) and ‘Nikomaru’ (...
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Bogor Agricultural University
2025-06-01
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| Series: | Journal of Natural Resources and Environmental Management |
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| Online Access: | https://journal.ipb.ac.id/index.php/jpsl/article/view/59869 |
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| author | Nazif Ichwan Taufiq Yuliawan Augustine Ukpoju Hiroki Oue |
| author_facet | Nazif Ichwan Taufiq Yuliawan Augustine Ukpoju Hiroki Oue |
| author_sort | Nazif Ichwan |
| collection | DOAJ |
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The canopy temperature of rice is a critical concern due to rising air temperatures and the increasing risk of heat damage. In this study, we investigated the canopy temperature difference (CTd) and canopy temperature depression (CTD) in the Japonica rice cultivars ‘Himenorin’ (HR) and ‘Nikomaru’ (NM). Additionally, we examined the effect of irrigating cooler water (ICWr) on canopy temperature, particularly its impact on CTD reduction, compared to a control plot. The results showed that CTd in HR was lower than in NM. Furthermore, CTD reached 2.23 °C in HR and 2.35 °C in NM under shallower ponding conditions. ICWr effectively reduced the canopy temperature in both cultivars and decreased CTD to a negative value. These findings highlight that ICWr can mitigate canopy temperature increases under more intense solar radiation and high air temperatures. Therefore, implementing ICWr in rice fields may serve as a potential countermeasure to reduce heat damage in rice by lowering canopy temperature. Further research is necessary to elucidate the underlying mechanisms and enhance strategies for mitigating heat exposure, ensuring rice resilience and sustainability in a changing climate.
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| format | Article |
| id | doaj-art-1bc5894bfc9d40978f16acb99c1ef69c |
| institution | OA Journals |
| issn | 2086-4639 2460-5824 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Bogor Agricultural University |
| record_format | Article |
| series | Journal of Natural Resources and Environmental Management |
| spelling | doaj-art-1bc5894bfc9d40978f16acb99c1ef69c2025-08-20T02:00:37ZengBogor Agricultural UniversityJournal of Natural Resources and Environmental Management2086-46392460-58242025-06-0115310.29244/jpsl.15.3.531Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and NikomaruNazif Ichwan0Taufiq Yuliawan1Augustine Ukpoju2Hiroki Oue3 The United Graduate School of Agricultural Science, Ehime University, Ehime, 790-8566, Japan Graduate School of Agriculture, Ehime University, Ehime, 790-8566, JapanThe United Graduate School of Agricultural Science, Ehime University, Ehime, 790-8566, JapanGraduate School of Agriculture, Ehime University, Ehime, 790-8566, Japan The canopy temperature of rice is a critical concern due to rising air temperatures and the increasing risk of heat damage. In this study, we investigated the canopy temperature difference (CTd) and canopy temperature depression (CTD) in the Japonica rice cultivars ‘Himenorin’ (HR) and ‘Nikomaru’ (NM). Additionally, we examined the effect of irrigating cooler water (ICWr) on canopy temperature, particularly its impact on CTD reduction, compared to a control plot. The results showed that CTd in HR was lower than in NM. Furthermore, CTD reached 2.23 °C in HR and 2.35 °C in NM under shallower ponding conditions. ICWr effectively reduced the canopy temperature in both cultivars and decreased CTD to a negative value. These findings highlight that ICWr can mitigate canopy temperature increases under more intense solar radiation and high air temperatures. Therefore, implementing ICWr in rice fields may serve as a potential countermeasure to reduce heat damage in rice by lowering canopy temperature. Further research is necessary to elucidate the underlying mechanisms and enhance strategies for mitigating heat exposure, ensuring rice resilience and sustainability in a changing climate. https://journal.ipb.ac.id/index.php/jpsl/article/view/59869Canopy temperature, Canopy temperature depression, Himenorin, Irrigating cooler water, Nikomaru |
| spellingShingle | Nazif Ichwan Taufiq Yuliawan Augustine Ukpoju Hiroki Oue Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru Journal of Natural Resources and Environmental Management Canopy temperature, Canopy temperature depression, Himenorin, Irrigating cooler water, Nikomaru |
| title | Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru |
| title_full | Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru |
| title_fullStr | Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru |
| title_full_unstemmed | Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru |
| title_short | Effect of Irrigating Cooler Water (ICWr) on The Canopy Temperature of Japonica Rice Cultivars Himenorin and Nikomaru |
| title_sort | effect of irrigating cooler water icwr on the canopy temperature of japonica rice cultivars himenorin and nikomaru |
| topic | Canopy temperature, Canopy temperature depression, Himenorin, Irrigating cooler water, Nikomaru |
| url | https://journal.ipb.ac.id/index.php/jpsl/article/view/59869 |
| work_keys_str_mv | AT nazifichwan effectofirrigatingcoolerwatericwronthecanopytemperatureofjaponicaricecultivarshimenorinandnikomaru AT taufiqyuliawan effectofirrigatingcoolerwatericwronthecanopytemperatureofjaponicaricecultivarshimenorinandnikomaru AT augustineukpoju effectofirrigatingcoolerwatericwronthecanopytemperatureofjaponicaricecultivarshimenorinandnikomaru AT hirokioue effectofirrigatingcoolerwatericwronthecanopytemperatureofjaponicaricecultivarshimenorinandnikomaru |