bison ranchers in North and South Dakota participated in a North Central Region
Sustainable Agriculture funded project to evaluate animal performance, carcass
quality, and economic returns when the forage feeding period was lengthened and
the grain feeding period was shortened in bison bulls fed for meat.
Each rancher compared two treatments with 20 animals included in each
Treatments were initiated at weaning and included 1) grain feeding from
weaning to slaughter, 2) hay fed during the winter followed by grain fed to
slaughter, 3) hay fed during the winter, grazing during the summer and grain fed
to slaughter, and 4) hay fed during the winter, grazing during the summer, hay
fed the second winter, and grain fed until slaughter. Extending the forage
feeding period and reducing the grain feeding period appeared to have little
effect on overall average daily gain and cost per pound of gain for treatments
1, 2, and 3.
However, some missing data cells, and other circumstances create concern
for the validity of the trial results.
Carcass quality was reduced in treatments 3 and 4 and gross return above
feed costs were lowest in treatment 4 by over $100 per head.
Producer trials across a wide geographic area with variable genetics and
management styles do not produce a uniform data set and can be a challenge when
However, data was generated in commercial ranch settings in every case by
producers using feeds common to their operations. Another trial under more
controlled protocol needs to be conducted to validate
the results of this study. h
Maximizing Forage and Minimizing Grain Intake in Bison Bulls Fed for Meat
V.L. Anderson and E.J.