数字农科院2.0

Water-saving management sustains yield of both ordinary paddy rice and drought-resistance rice varieties with reduced irrigation water in ratoon rice production of Central China

文献类型： 外文期刊

作者： Chen Yang;Huiping Wang;Yucheng Wang;Guodong Yang;Meng Zhang;Xiangning Wu;Bin Wang;Le Xu;Junming Tu;Jie Chen;Zheng Qi;Kehui Cui;Jianliang Huang;Shaobing Peng;Shen Yuan

作者机构：

关键词： Ratoon rice;Variety;Water management;Water-saving and drought-resistance rice;Yield

期刊名称： Field Crops Research

ISSN： 0378-4290

年卷期： 2025 年 333 卷

页码：

收录情况： SCIE（2025版）

摘要： Context: Ratoon rice is resource-efficient and environmentally friendly but faces challenges under climate-induced water scarcity. While water-saving irrigation and water-saving and drought-resistant varieties offer promise, their effects on yield and water productivity in ratoon rice system remain unclear. Objective: To evaluate the effects of water-saving irrigation and drought-resistant rice varieties on yield, yield components, water use, and water productivity in both main and ratoon crops. Methods: Field experiments were conducted using a split-plot design with two water regimes (continuous flooding [CF] and water-saving [WS]) as main plots and six rice varieties (three water-saving and drought-resistance rice [WDR] and three ordinary paddy rice [OPR] varieties) as subplots in Qichun and Xishui (Hubei, China) in 2023. Results: Yields were similar between CF and WS across sites, but WS reduced irrigation water use by 76.1–84.6 %, increasing water productivity by 16.3–140.0 %. Main crop yield was comparable between WDR and OPR, but WDR yielded 16.1–30.1 % less in the ratoon crop, resulting in lower water productivity. As a result, water productivity of WDR was significantly lower than that of OPR in ratoon crop but not in main crop. The lower ratoon crop yield of WDR was attributed to reduced total dry weight and a decreased number of panicles per unit area, which was associated with fewer panicles at the lower nodes. Significance: Water-saving irrigation maintained yield while reducing water input. To improve WDR performance in ratoon systems, future efforts should target enhancing ratoon biomass and promoting tillering from lower nodes.

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