Vpliv različnih antioksidantov na zdravje in histološko zgradbo prebavil pitovnih piščancev v pogojih vročinskega stresa

Stegnar, Manca (author), Rezar, Vida (mentor), Pirman, Tatjana (comentor)

Različni okoljski dejavniki vplivajo na zdravje in proizvodne rezultate pitovnih piščancev, vendar eden glavnih je vročinski stres, ki sproža oksidacijske procese v telesu živali. Antioksidanti so glavni zaviralci oksidacije v telesu. Glavni cilj magistrske naloge je bil preučiti dodatke vitaminov E, C in Se, ter njihove kombinacije na zdravje živali in histološko zgradbo prebavil. Zanimalo nas je tudi, ali v pogojih vročinskega stresa priporočila po vitaminih in mineralih NRC zadoščajo za pokrivanje potreb po antioksidantih v primerjavi s priporočili za piščance ross 308. V prehranski poskus je bilo vključenih 120 dan starih piščancev, ki so bili razdeljeni v 6 poskusnih skupin (NRC, Ross, VitE, VitC, Se in ECSe). Tekom poskusa smo spremljali pogin živali, zauživanje in izkoriščanje krme ter priraste. Na liniji klanja smo živalim odvzeli vzorce krvi, tankega, slepega in debelega črevesa in njihovo vsebino. Izmerili smo aktivnost jetrnih encimov, viskoznost in pH vsebine takega črevesa, koncentracijo hlapnih maščobnih kislin v tankem in slepem črevesu ter histološko zgradbo prebavil. Rezultati so pokazali, da dodatek vitaminov E, C in elementa Se ter njihove kombinacije ni vplival na histološke spremembe prebavil. Količine dodanih vitaminov in mineralov po priporočilih NRC in Ross so zadostovale za pokrivanje potreb pitovnih piščancev tudi v pogojih vročinskega stresa.

• Language: Slovenian
• Keywords: perutnina, pitovni piščanci, vročinski stres, antioksidanti, prebavila, histološka zgradba, zdravje
• Work type: Master's thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2020
• PID: 20.500.12556/RUL-121298
• COBISS.SI-ID: 31000323
• Publication date in RUL: 03.10.2020

Secondary language

• Language: English
• Title: The effect of different antioxidants on health and gut morphology of broilers under heat stress conditions

Abstract

Various environmental factors affect the health and production results of broilers, but one of the main factors is heat stress, which triggers oxidative processes in the animal`s body. Antioxidants are the main inhibitors of oxidation in the body. The main goal of the master`s thesis was to study the supplements of vitamins E, C Se and their combination in different concentrations on animal health and histological structure of the gastrointestinal tract. We were interested if under heat stress conditions, the NRC recommendations were sufficient to cover the antioxidant needs compared to the recommendations for Ross 308 chickens. The experiment included 120-day-old broilers, which were divided into 6 experimental groups (NRC, Ross, VitE, VitE, Se, and ECSe). During the experiment, we monitored mortality rate, feed consumption and conversion ratio, and weight gain. At the end of the experiment, we analysed the samples from blood serum, intestine, cecum and colon and their contents. Liver enzyme activity, intestinal viscosity, pH, SCFA concentration, and intestinal morphometric changes were measured. The results showed that feed supplementation with vitamin E, C, Se and their combination had no effect on histological changes of the gastrointestinal tract. There was a sufficient concentration of the studied vitamins and minerals in the recommended feed mixes of NRC and Ross, which covered the needs of broilers even under heat stress conditions.

• Keywords: poultry, broilers, heat stress, antioxidants, gut, morphology, health