Effect of diet supplementation with selenium, zinc and alpha-tocopherol on fatty acid composition in the liver and loin muscle of lambs

• Autorzy: Korniluk K , Gabryszuk M. , Kowalczyk J. , Czauderna M.

Warianty tytułu

PL

Wplyw uzupelniania diety selenem, cynkiem i alfa-tokoferolem na profil kwasow tluszczowych w watrobie i miesniu najdluzszym grzbietu jagniat

• Języki publikacji: EN

Abstrakty

EN

The effect was investigated of dietary selenate, ZnSO4, and α-tocopherol on fatty acid (FA) profile in the liver and longissimus dorsi (LD) muscle of 40 Polish Merino ram-lambs divided into the control (C) and experimental (E) group of 22 and 18 animals, respectively. Until week 8 of age all the lambs were maintained with their dams, then weaned, placed in individual straw-bedded pens and fattened individually with a pelleted concentrate mix. The mix was offered ad libitum until the animals mean body weight reached 31.8 kg. During fattening period the lambs from group E were administered per os 1 ml 0.1% Na2SeO4, 3 ml 10% ZnSO4 and 60 mg α-tocopherol daily.The treatment in group E (basal diet plus three additives) led to the significantly increased concentration of cis9trans11CLA and the sum of CLA isomers in the liver as well as to increase of the liver concentration of long-chain polyunsaturated fatty acids (LPUFA) and long-chain PUFAn-3 (LPUFAn-3). Selenate, α-tocopherol and Zn reduced the oxidation of unsaturated fatty acids, especially LPUFA in the liver. The additives resulted in weaker stimulation of accumulation of these FAs in the loin compared with the liver. Dosed selenate, ZnSO4 and α-tocopherol reduced the ruminal biohydrogenation of t11C18:1 and other unsaturated FAs to FAs containing less double bonds.

PL

Badano wpływ uzupełniania diety jagniąt selenianem (Na2SeO4), ZnSO4 i alfa-tokoferolem,podawanymi doustnie, na profil kwasów tłuszczowych (FA) w wątrobie i mięśniu najdłuższym grzbietu –LD. Użyto 40 tryczków merynosa polskiego, podzielonych na dwie grupy: doświadczalną (E) i kontrolną (C), liczące odpowiednio 22 i 18 zwierząt. Po odsadzeniu w wieku 8 tygodni, jagnięta tuczono w klatkach indywidualnych do średniej masy ciała 31,8 kg. W obu grupach zadawano do woli pełnoporcjową granulowaną mieszankę treściwą, zawierającą 0,15 mg Se i 28,8 mg Zn w kg suchej masy. Podczas tuczu,który trwał średnio 42 dni, każdemu jagnięciu z grupy E podawano codziennie per os 1 ml 0,1% Na2SeO4, 3 ml 10% ZnSO4 i 60 mg alfa-tokoferolu. Po uboju, od wszystkich jagniąt pobrano próbki wątroby i LD.Stwierdzono, że wątroba jagniąt, którym podawano Se, Zn i witaminę E, zawierała więcej cis9trans11CLA i sumy izomerów CLA. Dodatek ten powodował także wzrost zawartości długołańcuchowych wielonienasyconych kwasów tłuszczowych (LPUFA) i długołańcuchowych PUFAn-3 (LPUFAn-3) w wątrobie. Selenian, alfa-tokoferol i cynk ograniczały niszczenie PUFA, a zwłaszcza LPUFA w wątrobie jagniąt. Stosowane dodatki redukowały biouwodorowanie t11C18:2 i innych nienasyconych kwasów tłuszczowych w żwaczu do kwasów tłuszczowych zawierających mniej podwójnych wiązań.

Słowa kluczowe

EN

liver; animal breeding; selenium; alpha-tocopherol; loin muscle; animal feeding; lamb; zinc; fatty acid composition; diet supplementation

• Wydawca: -
• Czasopismo: Animal Science Papers and Reports
• Rocznik: 2008
• Tom: 26
• Numer: 1
• Opis fizyczny: p.59-70,ref.

Twórcy

autor

Korniluk K

• Polish Academy of Sciences, Jablonna, 05-110 Jablonna, Poland

autor

Gabryszuk M.

autor

Kowalczyk J.

autor

Czauderna M.

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