在使用DSSAT作物模型的节水场景下研究水产量的变化
Chih-Yu Hsieh1, Hungyen Chen1, Yi-Chien Wu2
1Department of Agronomy, National Taiwan University, Taipei, Taiwan.
PloS one
|August 1, 2025
概括
开发节水灌米可以显著减少用水量,同时保持产量. 这项研究显示,灌用水的潜在节约率为42-100%,这对粮食安全至关重要.
科学领域:
- 农业科学 农业科学
- 水资源管理 水资源管理
- 植物生理学作物生理学
背景情况:
- 全球水资源不稳定性威胁到粮食安全,需要节水耕种.
- 极端天气事件加剧了农业面临的水资源短缺挑战.
- 可持续的水生产需要创新的灌策略.
研究的目的:
- 为台湾大米品种推最佳的灌水策略.
- 量化通过节水耕作实现的节水,同时保持产量.
- 评估节水率和灌时间对大米生产的影响.
主要方法:
- 使用了三种大米品种 (TK9,TNG67,TCS10) 的历史产量数据.
- 使用DSSAT作物模型进行模拟节水种植实验.
- 开发了一种基于节水比率和灌时间的产量模型.
主要成果:
- 节水灌维持了90%以上的水产量.
- 估计灌用水节约在一个季节为48%至100%,在另一个季节为42%至61%.
- 在敏感的生长阶段进行有针对性的灌,可以节省大量的水 (40-75%和55-91%).
结论:
- 在不影响产量的情况下,节水比率的适度增加是可行的.
- 在敏感生长时期灌提供了大量的节水效益.
- 这些战略对于应对水资源短缺和确保可持续米生产至关重要.
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