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Growth performance, carcass and meat quality of lambs supplemented different vegetable oils

  • Miltko, Renata (The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences) ;
  • Majewska, Malgorzata Paulina (The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences) ;
  • Belzecki, Grzegorz (The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences) ;
  • Kula, Katarzyna (The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences) ;
  • Kowalik, Barbara (The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences)
  • 투고 : 2018.06.28
  • 심사 : 2018.11.05
  • 발행 : 2019.06.01

초록

Objective: The purpose of this study was to evaluate the effect of rapeseed and linseed oil supplementations on performance and meat quality of lambs. Methods: The experiment was conducted on 18 growing (100-day-old) lambs of $19.7{\pm}1.9kg$ live weight, assigned to 3 groups of 6 animals each. Control lambs were fed meadow hay and concentrate alone. Experimental animals additionally received rapeseed or linseed oils at a dose of 50 g/d. The lambs were slaughtered at an average body weight of $35.7{\pm}0.5kg$. Results: The dressing percentage was higher in lambs fed rapeseed oil. Total saturated fatty acids (SFA) and C15:0, C16:0, C17:0, C21:0, C24:0 were lower in longissimus dorsi muscle (MLD) in lambs fed linseed oil. Supplementation of diet with linseed oil decreased concentrations of total monounsaturated fatty acids and C16:1, C17:1, C18:1 cis-9 in MLD. The concentrations of n-3 polyunsaturated fatty acids (PUFA) and C18:3 n-3, C20:5 n-3 in MLD were higher in lambs fed linseed oil than in other groups. Oils supplementation to diets resulted in increased concentration of C22:6 n-3 in MLD. The inclusion of linseed oil into the diet increased the contents of total PUFA, n-3 PUFA and C18:3 n-3, C20:5 n-3, C22:6 n-3 in semitendinosus muscle in comparison to control. A tendency towards a lower n:6/n:3 ratio in MLD was observed when lambs were supplemented linseed oil. Conclusion: The supplementation of linseed oil to diets seems to reduce the concentration of SFA and increase the concentration of n-3 PUFA. The n-6/n-3 ratio is an important nutritional factor, and its value has been favorably decreased below 2, thereby achieving an important target related to human health. Due to these changes carcass fatty acid profile was improved, and so enhanced lamb meat healthy properties.

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