Učinki vitamina E in polifenolov oljk v prehrani pitovnih piščancev in rastočih prašičev

Leskovec, Jakob (author), Levart, Alenka (mentor), Salobir, Janez (comentor)

V delu smo preučevali vpliv vitamina E in s polifenoli bogatih ekstraktov oljk in ognjiča v prehrani pitovnih piščancev ter rastočih prašičev na oksidativni stres, povzročen z visokim vnosom n-3 VNMK. Nalogo smo razdelili na tri sklope ter preučevali: sinergistično delovanje vitamina E z vitaminom C ter selenom pri pitovnih piščancih, učinek ekstrakta oljčnih listov, bogatega s polifenoli oljk, v primerjavi z vitaminom E pri rastočih prašičih, ter vpliv dodatkov ekstrakta oljčnih listov in ognjiča na navidezno prebavljivost hranil in mineralizacijo kosti pri pitovnih piščancih. V omenjenih raziskavah smo ugotovili, da je vitamin E najučinkovitejši antioksidant za preprečevanje oksidativnega stresa, povzročenega s prehranskim vnosom n-3 VNMK, in da vitamin C in selen nimata sinergističnega delovanja z vitaminom E. Enako smo pokazali pri rastočih prašičih, kjer je vitamin E izkazal učinkovitejšo obrambo v primerjavi z ekstraktom oljčnih listov, učinek dodatka ekstrakta pa ni bil koncentracijsko odvisen. V tretjem delu naloge smo ugotovili, da ekstrakt oljčnih listov in ognjiča ne vpliva na izkoriščanje hranil pri pitovnih piščancih, prav tako pa ni imel vpliva na mineralizacijo kosti. Iz izsledkov opravljenih raziskav lahko zaključimo, da je najučinkovitejši antioksidant za zaščito proučevanih živali pred oksidativnim stresom vitamin E ter da njegova zamenjava npr. z ekstraktom oljčnih listov ni mogoča, čeprav na živali nima neugodnih učinkov.

• Language: Slovenian
• Keywords: prehrana živali, oksidativni stres, antioksidanti, vitamin E, polifenoli, oljke, ognjič, perutnina, pitovni piščanci, rastoči prašiči
• Work type: Doctoral dissertation
• Organization: BF - Biotechnical Faculty
• Year: 2019
• PID: 20.500.12556/RUL-112621
• COBISS.SI-ID: 4320136
• Publication date in RUL: 27.10.2019

LESKOVEC, Jakob, 2019, Učinki vitamina E in polifenolov oljk v prehrani pitovnih piščancev in rastočih prašičev [online]. Doctoral dissertation. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=112621

Secondary language

• Language: English
• Title: Effects of dietary vitamin E and olive polyphenols in broilers and growing pigs

Abstract

The objective of the study was to evaluate the influence of dietary vitamin E and olive polyphenols on the oxidative stress caused by a high intake of n-3 PUFA in broiler chickens and growing pigs. Research was divided into three sections: the synergistic effect of vitamin E with vitamin C and Se on broilers, the effect of olive leaf extract rich in olive polyphenols versus vitamin E in growing pigs, and the influence of olive leaf and marigold extract on the apparent digestibility of nutrients in broilers. In these studies, vitamin E was the most effective antioxidant for the prevention of oxidative stress caused by the dietary intake of n-3 PUFA, and vitamin C and Se did not have a synergistic effect with vitamin E in chickens. Similar results were obtained in growing pigs, in which vitamin E was a more effective defence than the olive leaf extract, and the effect of the extract was not concentration-dependent. In the third part of the thesis, we observed that the olive leaf extract did not affect the utilization of nutrients in broiler chickens, nor did it affect the mineralization of bones. From the results of the research we concluded that the most effective antioxidant to protect animals against oxidative stress is vitamin E, and that it is still premature to replace it with the olive leaf extract, although extract does not negatively affect the animals.

• Keywords: animal nutrition, oxidative stress, antioxidants, vitamin E, polyphenols, olives, marigold, poultry, broilers, growing pigs