Study on hierarchical regulation of crop irrigation threshold under severe drought conditions
The increased frequency of severe drought events has increased the global water supply security risks, posing a substantial threat to food crop yields such as rice. Therefore, it is crucial to accurately regulate rice irrigation thresholds and optimize the coordination between rice irrigation and th...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Agricultural Water Management |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378377424005754 |
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| _version_ | 1841557061511413760 |
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| author | Ruidan Gu Huaxiang He He Chen Jiake Tian |
| author_facet | Ruidan Gu Huaxiang He He Chen Jiake Tian |
| author_sort | Ruidan Gu |
| collection | DOAJ |
| description | The increased frequency of severe drought events has increased the global water supply security risks, posing a substantial threat to food crop yields such as rice. Therefore, it is crucial to accurately regulate rice irrigation thresholds and optimize the coordination between rice irrigation and the water demand of other industries under severe drought conditions. This study employed the WOFOST model to simulate rice yield in Chuxiong Yi Autonomous Prefecture, Yunnan Province, under various irrigation scenarios, focusing on severe drought conditions. Optimal irrigation schemes and corresponding irrigation thresholds were determined for different yield reduction rates during 90 % and 95 % extremely dry years, utilizing predefined rates of irrigation contribution, yield reduction, and water productivity. The results are as follows. (1) During extremely dry years, irrigation during the jointing-booting, heading-flowering stages can boost the yield by up to 218 % and 270 % compared to the yield without irrigation, respectively. Based on irrigation water productivity, it can be advisable to avoid reducing irrigation during the jointing-booting stage and heading-flowering stage. (2) The irrigation threshold varied according to the severity of drought. (3) During three consecutive years of severe drought, rice yield exhibited an annual decreasing trend, aiming to minimize comprehensive economic losses and optimize water utilization efficiently. This study can provide decision support for the hierarchical regulation of crop irrigation thresholds under severe drought conditions. |
| format | Article |
| id | doaj-art-f69841a8d9c846c1b59e0bf16d2ce4da |
| institution | Kabale University |
| issn | 1873-2283 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Agricultural Water Management |
| spelling | doaj-art-f69841a8d9c846c1b59e0bf16d2ce4da2025-01-07T04:16:51ZengElsevierAgricultural Water Management1873-22832025-02-01307109239Study on hierarchical regulation of crop irrigation threshold under severe drought conditionsRuidan Gu0Huaxiang He1He Chen2Jiake Tian3School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China; Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Corresponding author at: School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China.Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaThe increased frequency of severe drought events has increased the global water supply security risks, posing a substantial threat to food crop yields such as rice. Therefore, it is crucial to accurately regulate rice irrigation thresholds and optimize the coordination between rice irrigation and the water demand of other industries under severe drought conditions. This study employed the WOFOST model to simulate rice yield in Chuxiong Yi Autonomous Prefecture, Yunnan Province, under various irrigation scenarios, focusing on severe drought conditions. Optimal irrigation schemes and corresponding irrigation thresholds were determined for different yield reduction rates during 90 % and 95 % extremely dry years, utilizing predefined rates of irrigation contribution, yield reduction, and water productivity. The results are as follows. (1) During extremely dry years, irrigation during the jointing-booting, heading-flowering stages can boost the yield by up to 218 % and 270 % compared to the yield without irrigation, respectively. Based on irrigation water productivity, it can be advisable to avoid reducing irrigation during the jointing-booting stage and heading-flowering stage. (2) The irrigation threshold varied according to the severity of drought. (3) During three consecutive years of severe drought, rice yield exhibited an annual decreasing trend, aiming to minimize comprehensive economic losses and optimize water utilization efficiently. This study can provide decision support for the hierarchical regulation of crop irrigation thresholds under severe drought conditions.http://www.sciencedirect.com/science/article/pii/S0378377424005754WOFOST modelOptimal irrigation schemeConsecutive droughtYield |
| spellingShingle | Ruidan Gu Huaxiang He He Chen Jiake Tian Study on hierarchical regulation of crop irrigation threshold under severe drought conditions Agricultural Water Management WOFOST model Optimal irrigation scheme Consecutive drought Yield |
| title | Study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| title_full | Study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| title_fullStr | Study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| title_full_unstemmed | Study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| title_short | Study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| title_sort | study on hierarchical regulation of crop irrigation threshold under severe drought conditions |
| topic | WOFOST model Optimal irrigation scheme Consecutive drought Yield |
| url | http://www.sciencedirect.com/science/article/pii/S0378377424005754 |
| work_keys_str_mv | AT ruidangu studyonhierarchicalregulationofcropirrigationthresholdunderseveredroughtconditions AT huaxianghe studyonhierarchicalregulationofcropirrigationthresholdunderseveredroughtconditions AT hechen studyonhierarchicalregulationofcropirrigationthresholdunderseveredroughtconditions AT jiaketian studyonhierarchicalregulationofcropirrigationthresholdunderseveredroughtconditions |