Effect of Dietary Supplementation of Ferrous Sulfate on Performance and Carcass Characteristics of Finishing Lambs

  • Gamal M. Abdelrahim Department of Food and Animal Sciences, Alabama A & M University, Normal, AL 35762, USA
  • J. Khatiwada Department of Family and Consumer Sciences, North Carolina A&T State University, Greensboro, NC 27411, USA
  • A. Gueye School of Animal Science, Mt. Ida College, Newton, MA 02459, USA
Keywords: Iron, lamb, growth.


The objective of this study was to evaluate the effects of including elevated levels of FeSO4 in lambs diet on DMI, growth, and carcass characteristics. Twenty-four Gulf Coast wether lambs (26.3 ± 3.63 kg initial BW, and 8 to 9 months of age) were assigned to one of 2 blocks based on their BW were randomly allocated to 1 of the 3 dietary treatments, giving 8 lambs per treatment. Animals were grouped in 2 pens per treatment (4 lambs/pen) with pen serving as the experimental unit. Treatment diets containing supplemental FeSO4 at 0, 75, or 150 mg/kg of DM were fed lambs. Treatment diets consisted of dry-rolled corn, SBM, and fescue/bermudagrass hay and were formulated to be isonitrogenous and isocaloric and to meet or exceed the NRC requirements of a finishing lamb. Lambs were slaughtered, and data were collected after a 48-h chill. Both growth and carcass quality data were analyzed using the GLM procedures. Dry matter intake, final BW, and ADG were not different among treatments (P = 0.5, 0.9, and 0.7, respectively). Also, no differences were observed in HCW (P = 0.9), CCW (P = 0.8), body wall fat (P = 0.6), 12th rib fat (P = 0.9), K&P fat (P = 0.9) and REA (P = 0.7) among treatments. These results support our hypothesis that the addition of 75 or 150 mg FeSO4 /kg in finishing lamb diets do not impact DMI, growth rate, and carcass characteristics of meat sheep.


Download data is not yet available.