Soil water dynamics in mid-season rice fields under deficit irrigation

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 3; pp. 12 - 21
• Main Authors: LIU Fangping, HAO Enyi, XU Tao
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.03.2025
• Subjects: inadequate irrigation; water stress; soil moisture; migration rule; water consumption rule; middle- season rice
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2024281

【Objective】Soil water movement plays a crucial role in root water uptake and redistribution across the soil profile. Understanding its response to biotic and abiotic factors is essential for improving soil water use efficiency. This study investigates soil water dynamics in mid-season rice fields under deficit irrigation.【Method】The experiment was conducted in a rice field in the Poyang Lake Basin, where deficit irrigation was applied during four critical growth stages: early and middle jointing-booting, heading-flowering, and milking stages. A fully irrigated field served as the control. Soil moisture content was measured at depths from 15 cm to 210 cm. Water consumption, water consumption intensity, soil water movement, and moisture variations were analyzed under different irrigation treatments. 【Result】① Deficit irrigation significantly affected soil moisture in the 15-60 cm layer but had minimal impact below 110 cm. Across all growth stages, soil moisture initially declined and then stabilized. The larges