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Background <p>Research on the agronomic and seed production responses of maize to deficit drip-irrigation is limited in the arid region of northwest China. A two-year field experiment including multi-growth stage deficit drip irrigation treatments was conducted in a randomized block design to evaluate their effects on photosynthesis, resource use efficiency, grain yield, and seed quality of maize.</p> Results <p>Results indicated that a mild water deficit from emergence to the tasseling stage (EJ15) had no detrimental impact on plant growth, photosynthetic attributes, and yield components. Instead, it significantly increased chlorophyll contents (9.1–22.2%), leaf area index (5.1–19.3%), dry matter (6.7–24.5%), irrigation water productivity (13.5–14.6%), and grain protein (13.2–13.8%) compared to full irrigation at all growth stages (WCK) in 2023–2024. The EJ15 increased the grain yield (2.6–6.3%) compared to WCK, but the difference was statistically not significant. On the other hand, deficit irrigation during late vegetative or/and reproductive stage markedly decreased the photosynthetic parameters, resource use efficiency, and resulted in the lowest maize yield in both years.</p> Conclusion <p>Mild deficit irrigation during the early vegetative stages of maize can be used as a water-saving strategy for enhancing growth, water use efficiency, and seed quality without compromising the final yield in the arid region of northwest China.</p>

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Regulated multi-growth stage deficit drip irrigation improves growth attributes, water productivity, and yield performance of maize for hybrid seed production in an arid region

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月18日

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  • Yongling Zhang,
  • Rang Xiao,
  • Yunchen Zhao,
  • Haoliang Deng,
  • Hongjuan Zhang

摘要

Background

Research on the agronomic and seed production responses of maize to deficit drip-irrigation is limited in the arid region of northwest China. A two-year field experiment including multi-growth stage deficit drip irrigation treatments was conducted in a randomized block design to evaluate their effects on photosynthesis, resource use efficiency, grain yield, and seed quality of maize.

Results

Results indicated that a mild water deficit from emergence to the tasseling stage (EJ15) had no detrimental impact on plant growth, photosynthetic attributes, and yield components. Instead, it significantly increased chlorophyll contents (9.1–22.2%), leaf area index (5.1–19.3%), dry matter (6.7–24.5%), irrigation water productivity (13.5–14.6%), and grain protein (13.2–13.8%) compared to full irrigation at all growth stages (WCK) in 2023–2024. The EJ15 increased the grain yield (2.6–6.3%) compared to WCK, but the difference was statistically not significant. On the other hand, deficit irrigation during late vegetative or/and reproductive stage markedly decreased the photosynthetic parameters, resource use efficiency, and resulted in the lowest maize yield in both years.

Conclusion

Mild deficit irrigation during the early vegetative stages of maize can be used as a water-saving strategy for enhancing growth, water use efficiency, and seed quality without compromising the final yield in the arid region of northwest China.