Hsieh Chih-Yu, Chen Hungyen, Wu Yi-Chien, Teng Chih-Yung, Li Cheng-Hong
Department of Agronomy, National Taiwan University, Taipei, Taiwan.
Taichung District Agricultural Research and Extension Station, Council of Agriculture, Changhua, Taiwan.
PLoS One. 2025 Aug 1;20(8):e0329509. doi: 10.1371/journal.pone.0329509. eCollection 2025.
The current instability of water resources poses a major challenge and may lead to a food shortage crisis. To address this issue and to cope with the challenges of future extreme weather events and insufficient water resources, it is imperative to develop water-saving cultivation measures. This study used the long-term historical yield data of three rice varieties, TK9, TNG67 and TCS10, from an agricultural research station in Taiwan, simulated two water-saving cultivation experiments using the DSSAT crop model, and established a yield model based on the water-saving ratio, aiming to recommend appropriate irrigation water for Taiwan rice varieties. The goal was to save water while ensuring that the yield is not affected. Through water-saving cultivation simulation experiments, we estimated that under the condition of maintaining more than 90% of rice yield, water-saving irrigation treatment of rice in two different cropping seasons can save about 48% to 100% and 42% to 61% of irrigation water respectively. For irrigation treatment during sensitive growth stages, significant water-saving effects can be achieved, which are about 40% to 75% and 55% to 91% respectively. This study suggests that in the case of water shortage, it is possible to consider moderately increasing the water-saving ratio and implementing irrigation during sensitive growth periods, so as to effectively cope with future water shortage scenarios and achieve sustainable rice production while saving water resources.
当前水资源的不稳定构成了一项重大挑战，并可能导致粮食短缺危机。为解决这一问题并应对未来极端天气事件和水资源不足的挑战，开发节水栽培措施势在必行。本研究利用台湾某农业研究站三个水稻品种TK9、TNG67和TCS10的长期历史产量数据，使用DSSAT作物模型模拟了两个节水栽培试验，并基于节水率建立了产量模型，旨在为台湾水稻品种推荐合适的灌溉用水。目标是在确保产量不受影响的同时节约用水。通过节水栽培模拟试验，我们估计在保持水稻产量90%以上的条件下，两个不同种植季节的水稻节水灌溉处理分别可节约约48%至100%和42%至61%的灌溉用水。对于敏感生育期的灌溉处理，可实现显著的节水效果，分别约为40%至75%和55%至91%。本研究表明，在缺水情况下，可以考虑适度提高节水率并在敏感生育期进行灌溉，从而有效应对未来缺水情景，在节约水资源的同时实现水稻可持续生产。
