RESEARCH REGARDING CHEMICAL COMPOSITION OF BIRD’S LIVER GATHERED FROM ROSS 308 HYBRID

Paula Viorela Druc (Gafencu), Carmen Irimia (Gavrilescu), C. Spridon, M.G. Usturoi

Abstract
    Due to the fact that determination of chemical components from edible organs gathered from birds slaughtered at different ages didn’t represent a priority of research regarding quality and human consumers’ safety, in the current paper we aimed to realise a study about influence of slaughtering age on quality of liver gathered from a hen hybrid specialised in meat production.
    Studied material was bird’s liver gathered from Ross 308 hybrid. In this way were established 3 experimental batches, differentiating by the age at which slaughtering was realised (F₁= at 35 days; F₂= at 40 days; F₃= at 42 days). Quality determinations were realised on fresh product and aimed the content in water, dry matter, proteins, fats, ash, non-nitrogenous extractive substances and energetic value.
    Regarding protein content in analysed liver, batch F₁ recorded a mean value higher with 0.03% face to batch F₂ and with 0.15% face to batch F₃. Regarding fat content, the highest mean value was obtained by batch F₃, followed by batch F₂ and batch F₁; from statistical analysis of fat content was highlighted significant differences between batch F₁ vs. batch F₃ (P<0.05) and batch F₂ vs. batch F₃ (P<0.05). Calculus of energetic value presented the highest value at batch F₃, higher with 1.95 kcal/100g face to batch F₂ and with 1.31 kcal/100g face to batch F₁; differences between those 3 batches being without statistical significance (P˃0.05).
    The obtained results showed that slaughtering age for Ross 308 hybrid didn’t have a significance influence on chemical composition of liver, with exception of fat content which became higher with bird’s aging.

Key words: birds, slaughtering, liver, chemical composition