Author/Authors :
A.H and Baublits، نويسنده , , R.T and Brown Jr.، نويسنده , , A.H and Pohlman، نويسنده , , F.W. and Johnson، نويسنده , , Z.B and Onks، نويسنده , , D.O and Loveday، نويسنده , , H.D and Morrow، نويسنده , , R.E and Sandelin، نويسنده , , B.A and Coblentz، نويسنده , , W.K and Richards، نويسنده , , C.J and Pugh، نويسنده , , R.B، نويسنده ,
Abstract :
Soyhull supplementation to divergent biological types of cattle on forage-based systems was studied to determine the impact on carcass and color characteristics. Weaned calves (n=107) biologically classified as large-, medium-, or small-framed and intermediate rate of maturing were allocated to three cool-season grazing systems consisting of either orchardgrass pasture or fescue pasture, each with soyhull supplementation, or fescue pasture with no supplementation as a control. Supplementing cattle with soyhulls allowed for heavier (P<0.05) live and carcass weights, larger (P<0.05) longissimus muscle area, increased (P<0.05) backfat, kidney, pelvic and heart fat (KPH), and yield grades, and improved (P<0.05) marbling scores and quality grades. Utilizing cattle biologically classified as large- or medium-framed allowed for heavier (P<0.05) carcass weights without reducing (P<0.05) marbling scores or quality grades when compared to small-framed cattle. Instrumental color analysis of lean and adipose tissue revealed improved (P<0.05) lightness (L∗) in lean color for supplemented carcasses as compared to the control. There were no differences (P<0.05) between dietary treatments for L∗, a∗ or b∗ values of adipose tissue. These results indicate that supplementing forage-grazing cattle with soyhulls can improve carcass merit, and utilizing large- or medium-framed cattle can allow for increased carcass weights without decreasing carcass quality.
