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Related Experiment Videos

Phasic temperature control appraised with the Ceres-Wheat model.

T Volk1, B Bugbee, F Tubiello

  • 1Department of Biology, New York University 10003, USA. volk@is.nyu.edu

Life Support & Biosphere Science : International Journal of Earth Space
|January 1, 1997
PubMed
Summary
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Optimizing crop production with phasic control, which adjusts environmental conditions, can significantly boost grain yield. This study shows temperature manipulation can increase wheat yield by 15-20% through improved harvest index.

Area of Science:

  • Agricultural Science
  • Plant Physiology
  • Computational Biology

Background:

  • Phasic control involves dynamic environmental adjustments during crop development to maximize productivity.
  • Optimizing crop growth, especially in controlled environments like hydroponic systems, is crucial for food security and life support.

Purpose of the Study:

  • To model the impact of temperature variations on wheat grain yield using the Ceres-Wheat model.
  • To investigate the potential benefits of phasic control strategies for enhancing wheat productivity.

Main Methods:

  • Utilized a modified Ceres-Wheat model for hydroponic growth chambers to simulate wheat growth under various temperature regimes.
  • Established baseline yields at constant temperatures (10-30°C) and then simulated phasic control with single and multiple temperature shifts across crop life cycle phases.
Keywords:
NASA Discipline Life Support SystemsNon-NASA Center

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Main Results:

  • Peak daily grain yield occurred at 15°C, 25% higher than at 23°C under constant temperature conditions.
  • Phasic control strategies demonstrated a potential to increase grain yield by 15-20% compared to optimal constant temperatures, mainly by improving the harvest index.

Conclusions:

  • Dynamic temperature adjustments (phasic control) offer a promising strategy to significantly enhance wheat grain yield and optimize biomass allocation.
  • Further experimental validation is recommended to confirm model predictions and guide practical implementation for advanced food production systems.