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Stage-Specific Effects of Climatic Variation on Rice Yield and Nitrogen Use Efficiency for Identifying Adaptive

Yingjun Ma1,2,3, Xianglong Liang4, Zhongqi Li1,2,3

  • 1Sanya Institute of Nanjing Agricultural University, Sanya 572024, China.

Plants (Basel, Switzerland)
|February 27, 2026
PubMed
Summary
This summary is machine-generated.

Extreme weather impacts rice yield and nitrogen use efficiency (NUE). This study identified key climatic factors and rice genotypes for improving crop resilience in diverse climates.

Keywords:
LASSO regressionclimatic variationecological adaptabilitynitrogen metabolic enzymesnitrogen use efficiencyriceyield

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Area of Science:

  • Agronomy
  • Climate Science
  • Plant Physiology

Background:

  • Extreme weather variability poses a significant threat to global rice production and nitrogen use efficiency (NUE).
  • Understanding rice's response to diverse climatic conditions is crucial for developing adaptive strategies.

Purpose of the Study:

  • To investigate the impact of climatic factors and nitrogen application on rice yield and NUE.
  • To identify key rice genotypes and physiological mechanisms for enhanced climate resilience.

Main Methods:

  • Field experiments were conducted in subtropical and tropical climates over multiple years.
  • The least absolute shrinkage and selection operator (LASSO) regression model was used to identify key drivers.
  • Nitrogen metabolic enzyme activities were analyzed to understand physiological responses.

Main Results:

  • High-temperature stress during flowering and low-temperature stress during filling significantly limited rice yield.
  • Rainfall during the seedling stage and solar radiation during tillering positively influenced yield and NUE.
  • Nitrogen metabolic enzyme activity during filling was a core physiological link between environmental stress and yield.

Conclusions:

  • Specific climatic factors differentially affect rice yield and NUE across growth stages and regions.
  • Genotypes YZ2, IR30, and YZ3 demonstrated positive associations with yield and NUE.
  • Findings provide theoretical support and genetic resources for developing climate-resilient rice varieties.