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Related Experiment Videos

Simulation of lean lamb production systems.

H D Blackburn1, G D Snowder, H Glimp

  • 1U.S. Sheep Experiment Station, Dubois, ID 83423.

Journal of Animal Science
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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Simulations show that feeding lambs alfalfa pasture for 30 or 60 days before a traditional diet (A30-C2L, A60-C2L) maximized profits. Heavier slaughter weights (SW) and mature body weights (WMA) also increased returns, especially when lambs were priced by weight.

Area of Science:

  • Animal Science
  • Agricultural Economics
  • Livestock Production

Background:

  • Optimizing feedlot lamb production involves balancing nutritional strategies with market demands.
  • Understanding the impact of mature body weight (WMA) and slaughter weight (SW) on profitability is crucial for producers.

Purpose of the Study:

  • To evaluate the effects of different nutritional regimens and finishing weights on feedlot lamb performance and economic returns.
  • To determine the most profitable combination of WMA, SW, and diet for lamb production under varying market pricing schemes.

Main Methods:

  • Simulations were conducted using four mature sizes (WMA), three slaughter weights (SW), and three dietary treatments: traditional (C2L), 30-day alfalfa (A30-C2L), and 60-day alfalfa (A60-C2L).
  • Financial analysis considered two pricing schemes: weight-based and weight-based with carcass fat adjustment.

Related Experiment Videos

  • Biological efficiency was assessed as weight gain per dry matter intake.

    • Main Results:

    • Alfalfa pasture inclusion (A30-C2L, A60-C2L) increased ownership duration but enhanced net returns compared to C2L.
    • Higher WMA and SW generally increased ownership days and net returns when priced by weight.
    • Nutritional treatments and WMA significantly affected carcass fat content, influencing profitability under fat-adjusted pricing.

    Conclusions:

    • The A60-C2L nutritional strategy combined with a 90 kg WMA and 65 kg SW was most profitable when lambs were priced solely on weight.
    • When accounting for carcass fat discounts, lighter WMA (60-70 kg) with a 65 kg SW and A60-C2L diet yielded the highest returns.
    • Biological efficiency did not always correlate with net return, highlighting the importance of market price structure in determining profitability.