Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging
The development of an accurate root water-uptake model is pivotal for evaluating crop evapotranspiration; understanding the combined effect of drought and waterlogging stresses; and optimizing water use efficiency, namely, crop yield [kg/ha] per unit of ET [mm]. Existing models often lack quantitati...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/14/4/532 |
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| author | Jie Huang Wei Dong Luguang Liu Tiesong Hu Shaobin Pan Xiaowei Yang Jianan Qin |
| author_facet | Jie Huang Wei Dong Luguang Liu Tiesong Hu Shaobin Pan Xiaowei Yang Jianan Qin |
| author_sort | Jie Huang |
| collection | DOAJ |
| description | The development of an accurate root water-uptake model is pivotal for evaluating crop evapotranspiration; understanding the combined effect of drought and waterlogging stresses; and optimizing water use efficiency, namely, crop yield [kg/ha] per unit of ET [mm]. Existing models often lack quantitative approaches to depicting crop root water uptake in scenarios of concurrent drought and waterlogging moisture stresses. Addressing this as our objective; we modified the Feddes root water-uptake model by revising the soil water potential response threshold and by introducing a novel method to calculate root water-uptake rates under simultaneous drought and waterlogging stresses. Then, we incorporated a water stress lag effect coefficient, <inline-formula><math display="inline"><semantics><mrow><mi>φ</mi><mfenced separators="|"><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>s</mi></mrow></msub></mrow></mfenced></mrow></semantics></math></inline-formula>, that investigated the combined effect of historical drought and waterlogging stress events based on the assumption that the normalized influence weight of each past stress event decreases with an increase in the time interval before simulation as an exponential function of the decay rate. Further, we tested the model parameters and validated the results obtained with the modified model using data from three years (2016–2018) of rice (<i>Oryza sativa</i>, <i>L</i>) trails with pots in Bengbu, China. The modified Feddes model significantly improved precision by 9.6% on average when calculating relative transpiration rates, particularly post-stress recovery, and by 5.8% on average when simulating soil moisture fluctuations during drought periods. The root mean square error of relative transpiration was reduced by 60.8%, and soil water was reduced by 55.1%. By accounting for both the accumulated impact of past moisture stress and current moisture conditions in rice fields, the modified model will be useful in quantifying rice transpiration and rice water use efficiency in drought–waterlogging-prone areas in southern China. |
| format | Article |
| id | doaj-art-6557c1e79cb24490bb730aa4773265bf |
| institution | Kabale University |
| issn | 2077-0472 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj-art-6557c1e79cb24490bb730aa4773265bf2025-02-10T10:42:43ZengMDPI AGAgriculture2077-04722024-03-0114453210.3390/agriculture14040532Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and WaterloggingJie Huang0Wei Dong1Luguang Liu2Tiesong Hu3Shaobin Pan4Xiaowei Yang5Jianan Qin6Hubei Water Resources Research Institute, Wuhan 430070, ChinaHubei Water Resources Research Institute, Wuhan 430070, ChinaHubei Water Resources Research Institute, Wuhan 430070, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaHubei Water Resources Research Institute, Wuhan 430070, ChinaHubei Water Resources Research Institute, Wuhan 430070, ChinaHubei Water Resources Research Institute, Wuhan 430070, ChinaThe development of an accurate root water-uptake model is pivotal for evaluating crop evapotranspiration; understanding the combined effect of drought and waterlogging stresses; and optimizing water use efficiency, namely, crop yield [kg/ha] per unit of ET [mm]. Existing models often lack quantitative approaches to depicting crop root water uptake in scenarios of concurrent drought and waterlogging moisture stresses. Addressing this as our objective; we modified the Feddes root water-uptake model by revising the soil water potential response threshold and by introducing a novel method to calculate root water-uptake rates under simultaneous drought and waterlogging stresses. Then, we incorporated a water stress lag effect coefficient, <inline-formula><math display="inline"><semantics><mrow><mi>φ</mi><mfenced separators="|"><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>s</mi></mrow></msub></mrow></mfenced></mrow></semantics></math></inline-formula>, that investigated the combined effect of historical drought and waterlogging stress events based on the assumption that the normalized influence weight of each past stress event decreases with an increase in the time interval before simulation as an exponential function of the decay rate. Further, we tested the model parameters and validated the results obtained with the modified model using data from three years (2016–2018) of rice (<i>Oryza sativa</i>, <i>L</i>) trails with pots in Bengbu, China. The modified Feddes model significantly improved precision by 9.6% on average when calculating relative transpiration rates, particularly post-stress recovery, and by 5.8% on average when simulating soil moisture fluctuations during drought periods. The root mean square error of relative transpiration was reduced by 60.8%, and soil water was reduced by 55.1%. By accounting for both the accumulated impact of past moisture stress and current moisture conditions in rice fields, the modified model will be useful in quantifying rice transpiration and rice water use efficiency in drought–waterlogging-prone areas in southern China.https://www.mdpi.com/2077-0472/14/4/532root water uptakesoil water potentialcombined effectdrought and waterloggingrelative transpiration |
| spellingShingle | Jie Huang Wei Dong Luguang Liu Tiesong Hu Shaobin Pan Xiaowei Yang Jianan Qin Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging Agriculture root water uptake soil water potential combined effect drought and waterlogging relative transpiration |
| title | Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging |
| title_full | Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging |
| title_fullStr | Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging |
| title_full_unstemmed | Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging |
| title_short | Modeling and Analysis of Rice Root Water Uptake under the Dual Stresses of Drought and Waterlogging |
| title_sort | modeling and analysis of rice root water uptake under the dual stresses of drought and waterlogging |
| topic | root water uptake soil water potential combined effect drought and waterlogging relative transpiration |
| url | https://www.mdpi.com/2077-0472/14/4/532 |
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