Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions
Deep-water management (DWM) is a promising approach for effectively suppressing some paddy weeds with reduced use of herbicides. Because DWM for weed control is employed at the initial stage of rice growth, the growth inhibition in rice seedlings occurs by hypoxia. It is worth examining the optimum...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-01-01
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| Series: | Plant Production Science |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/1343943X.2024.2424523 |
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| author | Marina Iwasa Shunsuke Adachi Taiichiro Ookawa |
| author_facet | Marina Iwasa Shunsuke Adachi Taiichiro Ookawa |
| author_sort | Marina Iwasa |
| collection | DOAJ |
| description | Deep-water management (DWM) is a promising approach for effectively suppressing some paddy weeds with reduced use of herbicides. Because DWM for weed control is employed at the initial stage of rice growth, the growth inhibition in rice seedlings occurs by hypoxia. It is worth examining the optimum water control for minimizing rice growth inhibition with effective weed suppression. Here, we evaluated the seedling growth of rice and late watergrass under different water depths (WDs; 5 cm, 10 cm, 15 cm, and 20 cm) and growth temperature (18°C/15°C, 25°C/22°C, and 32°C/25°C of day/night temperature) in the controlled-environment chamber. As growth temperature increased, the WD required for complete suppression of late watergrass increased. A 15 cm or more of WDs completely suppressed the growth of late watergrass under moderate to higher temperature settings, but it significantly decreased the rice growth mainly due to the reduction of tiller number. The follow-up experiment revealed that a stepwise control of WD (10 cm for 3 days and 20 cm for 13 days) could completely suppress the growth of late watergrass without any decrease in rice growth under 32°C/25°C condition. Our findings will contribute to better weed control by DWM in paddy rice cultivation, although further study is needed for application. |
| format | Article |
| id | doaj-art-d727b0c00f784ca487e9eb766c089b78 |
| institution | Kabale University |
| issn | 1343-943X 1349-1008 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj-art-d727b0c00f784ca487e9eb766c089b782025-01-27T05:38:08ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082025-01-01281344310.1080/1343943X.2024.2424523Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditionsMarina Iwasa0Shunsuke Adachi1Taiichiro Ookawa2Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, JapanGraduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, JapanGraduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, JapanDeep-water management (DWM) is a promising approach for effectively suppressing some paddy weeds with reduced use of herbicides. Because DWM for weed control is employed at the initial stage of rice growth, the growth inhibition in rice seedlings occurs by hypoxia. It is worth examining the optimum water control for minimizing rice growth inhibition with effective weed suppression. Here, we evaluated the seedling growth of rice and late watergrass under different water depths (WDs; 5 cm, 10 cm, 15 cm, and 20 cm) and growth temperature (18°C/15°C, 25°C/22°C, and 32°C/25°C of day/night temperature) in the controlled-environment chamber. As growth temperature increased, the WD required for complete suppression of late watergrass increased. A 15 cm or more of WDs completely suppressed the growth of late watergrass under moderate to higher temperature settings, but it significantly decreased the rice growth mainly due to the reduction of tiller number. The follow-up experiment revealed that a stepwise control of WD (10 cm for 3 days and 20 cm for 13 days) could completely suppress the growth of late watergrass without any decrease in rice growth under 32°C/25°C condition. Our findings will contribute to better weed control by DWM in paddy rice cultivation, although further study is needed for application.https://www.tandfonline.com/doi/10.1080/1343943X.2024.2424523Deep water managementgrowth temperaturelate watergrasspaddy ricereduced herbicide usewater depth |
| spellingShingle | Marina Iwasa Shunsuke Adachi Taiichiro Ookawa Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions Plant Production Science Deep water management growth temperature late watergrass paddy rice reduced herbicide use water depth |
| title | Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| title_full | Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| title_fullStr | Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| title_full_unstemmed | Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| title_short | Optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| title_sort | optimum water depth for suppressing late watergrass growth with minimizing rice growth inhibition under different temperature conditions |
| topic | Deep water management growth temperature late watergrass paddy rice reduced herbicide use water depth |
| url | https://www.tandfonline.com/doi/10.1080/1343943X.2024.2424523 |
| work_keys_str_mv | AT marinaiwasa optimumwaterdepthforsuppressinglatewatergrassgrowthwithminimizingricegrowthinhibitionunderdifferenttemperatureconditions AT shunsukeadachi optimumwaterdepthforsuppressinglatewatergrassgrowthwithminimizingricegrowthinhibitionunderdifferenttemperatureconditions AT taiichiroookawa optimumwaterdepthforsuppressinglatewatergrassgrowthwithminimizingricegrowthinhibitionunderdifferenttemperatureconditions |