TY - JOUR
T1 - Comparison of Agronomic and Physiological Characteristics for Rice Varieties Differing in Water Use Efficiency under Alternate Wetting and Drying Irrigation
AU - Wang, Chen
AU - Fa, Xiaotong
AU - Meng, Qinghao
AU - Zhang, Ying
AU - Wang, Weilu
AU - Zhu, Kuanyu
AU - Zhang, Weiyang
AU - Gu, Junfei
AU - Liu, Lijun
AU - Zhang, Jianhua
AU - Zhang, Hao
N1 - This research was funded by the National Key Research and Development Program of China (2022YFD2300304), the National Natural Science Foundation of China (32272197, 32071944), the Hong Kong Research Grants Council (GRF 14177617, 12103219, 12103220, AoE/M-403/16), the State Key Laboratory of Agrobiotechnology (Strategic Collaborative Projects) in the Chinese University of Hong Kong, and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Publisher Copyright:
© 2024 by the authors.
PY - 2024/9/2
Y1 - 2024/9/2
N2 - Rice (Oryza sativa L.) stands as one of the most critical staple crops globally, with its yield and water use efficiency (WUE) being pivotal for food security. This study aimed to evaluate the agronomic and physiological traits and WUE of six rice varieties under two irrigation regimes: alternate wetting and drying (AWD) and conventional irrigation (CI). The results showed the significant improvements in grain yield and WUE with variety improvement under both irrigation treatments. Under AWD, high water use efficiency varieties (HWVs) demonstrated pronounced enhancements, including tillers and spikelet production, filled grain rate, 1000-grain weight, harvest index, leaf area index, non-structural carbohydrate remobilization, photosynthesis and catalase and peroxidase activities of leaf, root and shoot biomass, and root activity. AWD was observed to synchronize and amplify grain yield (2–14%) and WUE, including both leaf-level (13.94–20.72%) and yield-level (23.20–30.87%) water use efficiencies (WUEL and WUEY). The water use potential for HWVs was substantially enhanced under AWD. The integration of variety improvement with AWD irrigation strategies effectively achieves the dual objectives of high yield and WUE, offering a promising approach for sustainable rice production.
AB - Rice (Oryza sativa L.) stands as one of the most critical staple crops globally, with its yield and water use efficiency (WUE) being pivotal for food security. This study aimed to evaluate the agronomic and physiological traits and WUE of six rice varieties under two irrigation regimes: alternate wetting and drying (AWD) and conventional irrigation (CI). The results showed the significant improvements in grain yield and WUE with variety improvement under both irrigation treatments. Under AWD, high water use efficiency varieties (HWVs) demonstrated pronounced enhancements, including tillers and spikelet production, filled grain rate, 1000-grain weight, harvest index, leaf area index, non-structural carbohydrate remobilization, photosynthesis and catalase and peroxidase activities of leaf, root and shoot biomass, and root activity. AWD was observed to synchronize and amplify grain yield (2–14%) and WUE, including both leaf-level (13.94–20.72%) and yield-level (23.20–30.87%) water use efficiencies (WUEL and WUEY). The water use potential for HWVs was substantially enhanced under AWD. The integration of variety improvement with AWD irrigation strategies effectively achieves the dual objectives of high yield and WUE, offering a promising approach for sustainable rice production.
KW - rice
KW - variety improvement
KW - yield
KW - water use efficiency
KW - alternate wetting and drying irrigation
UR - http://www.scopus.com/inward/record.url?scp=85205041398&partnerID=8YFLogxK
U2 - 10.3390/agronomy14091986
DO - 10.3390/agronomy14091986
M3 - Journal article
AN - SCOPUS:85205041398
SN - 2073-4395
VL - 14
JO - Agronomy
JF - Agronomy
IS - 9
M1 - 1986
ER -
