中国水稻科学2026，Vol.40Issue(3)：360-374,15.DOI:10.16819/j.1001-7216.2026.250304
旱作水稻在水分胁迫下的光合生理响应与优化灌溉策略
Photosynthetic Physiological Response and Optimized Irrigation Strategy of Dryland Rice Under Water Stress
摘要
Abstract
[Objective]Given the challenges of water scarcity and abundant light resources in the arid northwest region,this study aims to investigate the relationship between farmland soil moisture and crop photosynthesis to improve comprehensive resource utilization.The goal is to establish a complementary soil moisture-light mechanism,thereby promoting sustainable resource utilization.[Method]From 2019 to 2021,field experiments were conducted at three typical experimental sites in the Yellow River irrigation area of Ningxia Hui Autonomous Region.Using traditional full irrigation as the control,different drip irrigation treatments with varying water levels were established to analyze the effects of different degrees of water stress on photosynthesis,key growth indicators,and yield components during critical growth stages of rice.[Results]Water stress reduced the photosynthetic rate and the transpiration rate of rice and negatively affected yield components,but improved water use efficiency.The maximum net photosynthetic rate occurred at the booting stage,during which that under water stress treatments decreased significantly by 4.5%-26.6%compared to CK.The minimum value appeared at the milk-ripe stage,with a significant decrease of 4.2%-46.9%under water stress compared to CK.The maximum transpiration rate was observed at the booting stage,decreasing by 2.2%-16.8%under water stress relative to CK.The minimum transpiration rate occurred at the seedling stage,decreasing by 7.5%-40.7%under water stress compared to CK.Under water stress,rice plant height,straw height,straw dry weight,filled grain rate,1000-grain weight,and yield decreased by 2.2%-24.3%,0.3%-12.6%,0.8%-11.6%,0.5%-7.9%,0.3%-9.2%,and 2.3%-71.5%,respectively,compared to CK.However,water consumption decreased by 33%-46%.Under mild stress,water use efficiency at the yield level increased by 1.9%-21.5%compared to CK,while leaf-level water use efficiency decreased by 2.1%-6.8%.These results indicate that mild water stress can reduce water consumption while maintaining relatively high yield,thereby improving water resource utilization efficiency.Using the TOPSIS model combined with the information weight method and entropy weight method to evaluate different water stress treatments,it was found that maintaining the soil moisture lower limit at 90%-100%of field capacity can optimize yield,quality,and water use efficiency.[Conclusion]In arid and semi-arid regions,precisely regulated deficit irrigation strategies should be further promoted to maximize the drought resistance potential of rice.As an effective approach for water-saving agriculture,this can reduce water consumption while maintaining stable grain production.关键词
旱作水稻/水分胁迫/光合作用/生理特性/TOPSIS 模型Key words
dryland rice/water stress/photosynthesis/physiological characteristics/TOPSIS model引用本文复制引用
杨青青,何进宇,杨海林,李欣欣,温鑫雨,鲍宪远,张登毓,杨佳鹤,崔烜玮..旱作水稻在水分胁迫下的光合生理响应与优化灌溉策略[J].中国水稻科学,2026,40(3):360-374,15.基金项目
国家重点研发计划资助项目(2021YFD1900601-02-04) （2021YFD1900601-02-04）
宁夏重点研发项目(引才专项)(2018BEB04013) （引才专项）
宁夏自然科学基金资助项目(2022AAC03091) （2022AAC03091）
宁夏高等学校一流学科建设项目(NXYLXK2021A03) （NXYLXK2021A03）
宁夏大学博士科研启动基金资助项目 （）
宁夏留学回国人员创新创业项目. （）
