Dietary influence on fatty acid characteristics of lamb carcass in relation to protein source

• Main Author: Yossifov M.R.
• Format: Article
• Language: English
• Published: Institute for Animal Husbandry, Belgrade 2014-01-01
• Series: Biotechnology in Animal Husbandry
• Subjects: Lamb; Protein Source; Carcass; DDGSc; Fatty Acids Profile and Indices
• Online Access: https://scindeks-clanci.ceon.rs/data/pdf/1450-9156/2014/1450-91561402203Y.pdf
• ISSN: 1450-9156; 2217-7140

The aims of our study were to evaluate the effect of different protein supplements on fatty acid (FA) composition (%), profile (ratios and indices), etc. of carcass in lambs fed iso-caloric, iso-nitrogenous and equal in PDI and Ca: P ratio high- concentrate rations. Regional breed (Bulgarian Synthetic Dairy Population) lambs were fed cereal-based diets with different protein supplement - control diet with sunflower meal (SFM) or a DDGSc diet containing dried distillers' corn grains with solubles (DDGSc). Animals were slaughtered after 87-d feedlot period. Fat tissue extracted from carcass was analyzed for FA profile. There were significantly higher (p< 0.01) performance (FBW= 38.90 vs. 35.1 kg and HCW= 5.24 vs. 4.67 kg) of DDGSc diet on lamb performance. Feeding 37.6 % (DM basis) DDGSc significantly increased the content of C18:2 (p< 0.05) but decreased n3 PUFA and total long chain n3 FA (p< 0.05) compared with control group. DDGSc increased n6 (p= 0.06), PUFA (p= 0.07) and PUFA / SFA ratio (p= 0.10), but decreased MUFA (p= 0.10). Examined relationships between ingested FA and carcass FA in slaughtered lambs shows good parity and are characterized with significant Pearson's correlation coefficients (R> 0.56). In regards to obtained results, dietary DDGS inclusion altered the fatty acid profile and indices of lipids of lamb carcass.