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This research aims to elucidate how different levels and durations of water deficit influence winter wheat yield through physiological mechanisms.

April 24, 2026AgronomyOpen Access

The Physiological Mechanism of Coupled Regulation Between Water Deficit Severity and Deficit Period on Winter Wheat Yield

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Examines the impact of water deficit severity and timing on winter wheat yield, suggesting crucial insights for irrigation practices.

This research aims to elucidate how different levels and durations of water deficit influence winter wheat yield through physiological mechanisms.
Established three water deficit treatments at 65%, 55%, and 45% field capacity.
Measured physiological indicators including plant water status, chlorophyll content, and net photosynthesis.
Analyzed the relationships between physiological indicators during different growth stages under varying irrigation conditions.
Lowering the irrigation threshold to 55% results in minimal effects on chlorophyll content but affects net photosynthesis.
When irrigation is reduced below 55%, chlorophyll content significantly decreases, adversely impacting net photosynthesis and yield.
Physiological responses differ across growth stages, with significant yield reduction observed during the jointing and heading-anthesis stages.

Yu et al. (2026) studied this question.

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