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

IF 6.4 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-07-21 DOI:10.1016/j.fcr.2025.110077

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

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引用次数: 0

Abstract

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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节水管理使华中地区普通水稻和抗旱水稻品种在节水条件下均能保持产量

水稻是资源节约型和环境友好型水稻，但在气候引起的水资源短缺下面临挑战。虽然节水灌溉和节水抗旱品种有希望，但它们对再生稻系统产量和水分生产力的影响尚不清楚。目的评价节水灌溉抗旱水稻品种对主粮作物和副粮作物产量、产量构成、水分利用和水分生产力的影响。方法2023年在中国湖北齐春和西水采用连续淹水（CF）和节水（WS）两种水分制度为主区，6个水稻品种（3个节水抗旱水稻（WDR）和3个普通水稻（OPR）品种）为次区进行田间试验。结果不同地点的土壤水分产量相近，但土壤水分利用率降低76.1 ~ 84.6 %，水分生产力提高16.3 ~ 140.0 %。主要作物产量在WDR和OPR之间相当，但WDR在再生作物中产量低16.1-30.1 %，导致水分生产力较低。结果表明，干粮作物的水分生产力显著低于主粮作物的水分生产力，而主粮作物的水分生产力则不显著低于主粮作物。冬小麦单产较低的主要原因是总干重和单位面积穗数的减少，这与低节的穗数减少有关。节水灌溉在减少水分投入的同时保持了产量。为了提高生根系统的WDR性能，未来的工作应侧重于提高生根生物量和促进低节点分蘖。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.