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Related Experiment Videos

Experiments with the Cornell intermittent lighting system for laying hens.

T R Morris1, M Midgley, E A Butler

  • 1Department of Agriculture, University of Reading, England.

British Poultry Science
|June 1, 1988
PubMed
Summary

The Cornell lighting system, using 10 hours of light daily, achieved similar egg output to conventional programs. Early application advanced sexual maturity, increasing lay rate but reducing egg size, while later application showed comparable results.

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Area of Science:

  • Animal Science
  • Poultry Husbandry
  • Avian Physiology

Background:

  • Lighting programs significantly influence poultry production, affecting egg laying and feed intake.
  • The Cornell lighting system offers a potential alternative to conventional step-up programs.

Purpose of the Study:

  • To evaluate the efficacy of the Cornell lighting system on egg production and egg quality.
  • To compare the Cornell lighting system with conventional programs under varying light intensities and application timings.

Main Methods:

  • Two experiments involving 1728 brown-egg stock hens each, utilizing light-proof rooms.
  • Comparison of Cornell lighting (2L:4D:8L:10D) with conventional step-up programs at different light intensities (2 and 10 lux) and ages of introduction (18, 21, 24 weeks).

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Main Results:

  • Cornell lighting (10h light/day) yielded similar total egg output to conventional programs (16h light/day).
  • Early introduction (18 weeks) of Cornell lighting advanced sexual maturity, increasing lay rate but decreasing egg size.
  • Later introduction (21 or 24 weeks) resulted in comparable egg numbers and size to conventional programs.
  • Food intake was approximately 2% lower with Cornell lighting.
  • Lower light intensity (2 lux) resulted in slightly fewer but heavier eggs compared to higher intensity (10 lux).

Conclusions:

  • The Cornell lighting system can achieve comparable egg production to conventional programs with reduced light duration.
  • Timing of Cornell lighting introduction is critical; early application impacts sexual maturity and egg characteristics.
  • Reduced light hours under the Cornell system may lead to decreased feed intake, offering potential cost savings.