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Related Experiment Videos

Alternative procedures for molt induction: practical aspects.

A Bar1, V Razaphkovsky, D Shinder

  • 1Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan 50250, Israel. ariebar@agri.gov.il

Poultry Science
|April 25, 2003
PubMed
Summary
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Feed withdrawal and short daylight improve postmolt hen production, but long rest periods can mask these benefits. Consider rearing nonmolting hens for longer periods for economic viability.

Area of Science:

  • Animal Science
  • Poultry Production
  • Reproductive Physiology

Background:

  • Molting is a natural process for poultry, impacting egg production and subsequent performance.
  • Environmental factors like daylight and dietary interventions can influence the molting process and recovery.
  • Understanding these factors is crucial for optimizing poultry farm economics and productivity.

Purpose of the Study:

  • To investigate the effects of feed withdrawal (FW), short daylight, and specific dietary strategies on molting and postmolt performance in hens.
  • To evaluate the economic implications of induced molting versus continuous production cycles.
  • To assess the impact of nicarbazin (NICR) and zinc (Zn) supplementation on egg production and shell quality.

Main Methods:

  • Hens were subjected to different regimes including feed withdrawal, short daylight (10.5-11 h/d), and dietary treatments (low-protein, NICR, high-Zn, Zn-CaP).

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  • Rest period length, egg production, feed intake, and eggshell quality were monitored.
  • Postmolt performance was compared between treatment groups and with nonmolted controls.

    • Main Results:

    • Feed withdrawal combined with short daylight and a long recovery period yielded the best postmolt production.
    • A long rest period can obscure the positive effects of short daylight and recovery diets.
    • High-zinc diets and feed withdrawal improved postmolt performance; nicarbazin had a lesser effect.

    Conclusions:

    • Induced molting strategies, particularly feed withdrawal with short daylight, can enhance postmolt production.
    • The extended time required for molted hens to compensate for lost egg production (140-170 days) necessitates economic evaluation.
    • Rearing nonmolting hens for extended periods (640-700 days) may be more economically viable under certain conditions.