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[Chilling damage comprehensive assessment methods for rice.]

Fei Yun Yang1, Yu Shu Zhang2, Wen Ke Li1

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|April 26, 2018
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Summary
This summary is machine-generated.

This study assessed rice chilling damage in Northeast China using grey correlation analysis. Results show low temperatures significantly impact rice yield by affecting key growth stages and grain development.

Keywords:
chilling damagecomprehensive assessmentgrey relational analysisnortheast Chinarice

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Area of Science:

  • Agricultural Science
  • Agronomy
  • Climate Science

Background:

  • Chilling damage significantly impacts rice production, particularly in regions like Northeast China.
  • Understanding the relationship between chilling events and rice yield is crucial for food security.
  • Previous assessments often lack a comprehensive, multi-stage analysis of chilling damage effects.

Purpose of the Study:

  • To develop a comprehensive model for assessing rice chilling damage.
  • To identify key chilling damage inducing factors and their impact on rice yield structure.
  • To analyze the relationship between chilling damage and rice yield across different growth stages.

Main Methods:

  • Employed grey correlation analysis to establish relationships between chilling factors, yield traits, and final yield.
  • Constructed a multi-level grey correlation analysis model for comprehensive chilling damage assessment.
  • Developed stage-specific indices for evaluating chilling damage impacts.

Main Results:

  • A strong correlation was found between chilling damage and reduced rice yield.
  • Low temperatures during critical growth stages (vegetative, reproductive, pollination, grain filling) negatively affected yield components.
  • Specific impacts included decreased panicle number, grain number, and thousand-kernel mass, alongside increased empty grain rates.

Conclusions:

  • The developed model effectively assesses rice chilling damage and its impact on yield.
  • Temperature fluctuations during specific rice growth phases are critical determinants of yield outcomes.
  • Findings provide valuable insights for mitigating chilling damage in rice cultivation.