Qian et al. (2026) Spatiotemporal Evolution of Waterlogging Intensity During Winter Oilseed Rape Growth Stages and Its Relationship with Yield Losses in the Middle-Lower Yangtze River Region

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Identification

• Journal: Agriculture
• Year: 2026
• Date: 2026-09-05
• Authors: Long Qian, Huayue Meng, Yunying Luo, Kai Duan
• DOI: 10.3390/agriculture16171925

Research Groups

• Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences (CASS)
• Key Laboratory of Agrometeorology, CASS
• College of Agronomy, Hubei University of Technology

Short Summary

This study introduces a daily-scale agrometeorological index (SAPEI) to quantify waterlogging intensity in winter oilseed rape growth stages and examines its relationship with yield losses across the Middle-Lower Yangtze River Region.

Objective

• Investigate the spatiotemporal evolution of waterlogging intensity during different winter oilseed rape growth stages and its impact on crop yields

Study Configuration

• Spatial Scale: The study focuses on the Middle-Lower Yangtze River Region (MLYRR) in China.
• Temporal Scale: Daily-scale data from 1961 to 2020 were analyzed.

Methodology and Data

• Models used: SAPEI (daily-scale agrometeorological index)
• Data sources: Historical climate data, crop yield records

Main Results

• Waterlogging intensity increased significantly over the past six decades in most areas of MLYRR.
• The northeastern and southernmost regions were identified as highly waterlogging-prone areas.
• Severe waterlogging (SAPEI > 1.0) had a greater impact on crop yields than general waterlogging (SAPEI > 0.5).
• A marked spatial mismatch was found between waterlogging proneness and crop sensitivity.

Contributions

• This study provides the first quantitative relationship between waterlogging intensity and yield losses in winter oilseed rape across different growth stages.
• The findings highlight the importance of considering crop waterlogging sensitivity when planning targeted drainage strategies.

Funding

• National Key Research and Development Program of China (2016YFD0300403)
• National Natural Science Foundation of China (41671018)

Citation

@article{Qian2026Spatiotemporal,
  author = {Qian, Long and Meng, Huayue and Luo, Yunying and Duan, Kai},
  title = {Spatiotemporal Evolution of Waterlogging Intensity During Winter Oilseed Rape Growth Stages and Its Relationship with Yield Losses in the Middle-Lower Yangtze River Region},
  journal = {Agriculture},
  year = {2026},
  doi = {10.3390/agriculture16171925},
  url = {https://doi.org/10.3390/agriculture16171925}
}