Vpliv načina reje na maščobnokislinsko sestavo mišic bikov

Mojca VOLJČ, Alenka LEVART, Marko ČEPON, Silvester ŽGUR

Povzetek


Namen raziskave je bilo oceniti vpliv različnih načinov reje bikov na maščobnokislinsko sestavo (MK) treh mišic (longissimus thoracis, semitendinosus in diaphragmae). Prvo skupino (MGSC) je sestavljalo 8 bikov rjave pasme, ki so bili krmljeni s koruzno in travno silažo ter močno krmo. V drugi skupini (MCS) je bilo 8 bikov lisaste pasme, ki so bili krmljeni s koruzno silažo, s siliranim mletim koruznim zrnjem ter močno krmo. Tretja skupina (GS) je vključevala 6 bikov križancev med limuzin in lisasto pasmo, ki so bili ves čas do zakola na paši ob svojih materah dojiljah. V četrti skupini (G) je bilo 8 bikov lisaste pasme, ki so bili na paši zadnjo fazo pitanja to je od spomladi in pa do zakola, ki je potekal jeseni. Biki iz skupine MGSC in MCS so imeli podobno maso klavnih trupov, to je 316 in 308 kg. Biki iz skupine GS so imeli najmanjšo maso zaklanih trupov (215 kg), medtem ko so bili biki iz G skupine najtežji (371 kg). Zamaščenost klavnih polovic je bila podobna pri MSC, MGSC in G bikih in malo manjša pri GS bikih. Vsebnost nasičenih MK se je med skupinami razlikovala samo v semitendinosus. Biki s paše so imeli v vseh treh mišicah večjo vsebnost enkrat (ENMK) in večkrat nenasičenih MK (VNMK). Biki spitani na paši so imeli tudi večjo vsebnost n-3 VNMK v vseh treh mišicah, medtem ko je bila značilna večja vsebnost n-6 VNMK samo v mišici semitendinosus in diaphragmae. Biki s paše so imeli tudi ožje razmerje n-3/n-6 VNMK v vseh treh mišicah. v Biki iz GS skupine so imeli tudi večjo vsebnost konjugirane linolne kisline v primerjavi z biki iz MGSC in MCS skupine v vseh mišicah razen v semitendinosus, kjer je bila vsebnost višja le v primerjavi z MGSC skupino.

Ključne besede


govedo; biki; načini reje; mišice; maščobne kisline

Celotno besedilo:

PDF (English)

Literatura


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DOI: http://dx.doi.org/10.14720/aas.2018.112.1.5

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Avtorske pravice (c) 2018 Mojca VOLJČ, Alenka LEVART, Marko ČEPON, Silvester ŽGUR

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