Tip of The Day - October 19, 2016

Photo by Tom Semadeni

March 3

1988 Economic Optimization in Beef Production

Sue Armstrong et al.

Direct and maternal contributions to weaning weight and feed intake were estimated for four breeding systems using data collected from 773 cow-calf pairs at the Elora Beef Research Centre between 1979 and 1986. Breeding systems were defined as purebred Hereford (HE); a four way rotational dual purpose (SR) system using Tarentaise, Angus, Gelbvieh, and Pinzgauer breeds; a three way large breed rotation (LR) using Maine Anjou, Simmental, and Charolais; and a Angus sired large rotational (ALR) and the other breeds in LR.

LR had the highest weaning weights and direct and maternal contributions to weaning weight, followed by ALR, SR, and HE. LR dams had the highest feed intakes for both dry and lactation periods. Conversely, HE calves consumed the greatest amount of creep feed, followed by ALR, SR, and LR.

An economic returns equation was derived which included feed intake, and direct and maternal weaning weight. A linear programming model (LPM) was designed to incorporate the economic returns equation as the objective function. In general, LR produced the greatest economic returns followed by SR, then ALR and HE, depending on specific resource constraints and beef to feed price ratios. Only at very cheap feed prices relative to beef prices did ALR exceed SR in economic returns. HE exceeded LR for economic returns only when LR were in a reproductively stressful environment with limited feed supply.

Photo by Tom Semadeni

Barn in Snow