Effects of Fat Sources and Energy to Protein Ratio on Growth Performance and Carcass Composition of Chicks

  • Jin, Young-Hee (Dept. of Food Science and Technology, Kimcheon College, Kimcheon 740-200)
  • Published : 1996.10.01

Abstract

Three hundred and twenty-four 1 day old chicks were used to determine the effects of fat source and energy to protein ratio on growth performance , carcass composition and the efficiency on nutrient utilization. Chicks were assigned. in a completely randomized design, to 3*3 factorial arrangement of treatments. Chicks received one of three fat sources (n0 fat, tallow, corn oil) and one of three energy to protein ratios(16, 14 and 12kcal ME/g CP). All diets were formulated to be isocaloric(3.2Mcal ME/kg diets) using published ME values for the diet ingredients. Addition of tat to the diet increased ADG, average daily feed intake, and gain to feed, Chicks fed diets containing fat had increased percentage body DM and ether extract(EE), but percentage CP was not different, Chicks fed diets containing fat had increased efficiency of protein and energy deposition. Addition of fat ad either fallow or corn oil yielded similar results. Reducing the energy to protein ratio of the diet did not affect ADG or gain to feed, but tended to decrease average daily feed intake(p=0.80), as well as resulting in linear(p<0.05) reductions in body percentage DM., EE and also total EE. Increasing the energy to protein ratio did not affect percentage or total body Cp. Adding fat to poultry diets improved growth performance and the efficiency of growth chicks. Decreasing the energy to protein ratio did not affect growth performance, but reduced EE in the body of Chicks.

References

  1. Poult. Sci. v.56 The modifying effect of calorie : protein ratio on laying hen performance and on the "extra metabolic effect" of added fat Horani,F.;Sell,J.L.
  2. Poult. Sci. v.60 Nature of the extrametabolic effect of supplemental fat used in semipurified for laying hens Mateos,G.G.;Sell,J.L.
  3. Poult. Sci. v.60 Influence of fat and carbohydrate source on rate of food passage of semi-purified diets for laying hens Mateos,G.G.;Sell,J.L.
  4. Poult. Sci. v.57 The true metabolizable energy values of mixtures of tallow with either soybean oil or lard Sibbald,I.R.
  5. Poult. Sci. v.61 Rate of food passage(transit time) as influenced by level of supplemental fat Mateos,G.G.;Sell,J.L.;Eastwood,J.A.
  6. Poult. Sci. v.55 Factors influencing the quantity of abdominal fat in broilers. 2. Cage versus floor rearing Deaton,J.W.;Kubena,L.F.;Chen,T.C.;Reece,F.N.
  7. Poult. Sci. v.64 Energy and protein relationships in broiler. 1. Effect of protein levels and feeding regimens on growth, body composition, and in vitro lipogenesis of broiler chicks Resebrough,R.W.;Steele,N.C.
  8. Nutrient requirements of poultry (8th ed.) National Research Council
  9. SAS User's guide : Statiatics SAS
  10. Principles procedures of stastistics Stee,R.D.;Torrie,J.H.
  11. Poult. Sci. v.57 The effect of diet on liver and body composition in the chicks Seaton,K.W.;Thomas,O.P.;Gous,R.M.;Bossard,E.H.
  12. J. Nutr. v.110 Effect of dietary protein level upon essential fatty acid deficiency Hill,E.G.;Holman,R.T.
  13. Poult. Sci. v.44 Body composition and protein utilization of chicks fed graded levels of fat Velu,J.G.;Baker,D.H.
  14. Poult. Sci. v.56 Fat deposition in the broiler: effect of dietary energy to protein balance, and early life caloric restriction on productive performance and abdominal fat pad size Griffiths,L.;Leeson,S.;Summer,J.D.
  15. Poult. Sci. v.35 Studies on energy levels in poultry rations. 1. The effect of calorie to protein ratio on growth, nutrient utilization and body composition of chicks Donaldson,W.E.;Combs,G.F.;Romoser,G.L.
  16. Poult. Sci. v.44 The effect of dietary energy and protein on carcass composition with a note on a method for estimating carcass composition Summer,J.D.;Slinger,S.L.;Ashton,G.C.
  17. Poult. Sci. v.61 Effect of dietary protein and energy on broiler carcass composition and efficiency nutrient utilization Jackson,S.;Summers,J.D.;Leeson,S.