Dias Kelly M M, Oliveira Carlos H, Calderano Arele A, Rostagno Horacio S, O'Connor Kevin E, Davis Reeta, Walsh Meg, Britton James, Altieri Enrico A, Albino Luiz F T
Department of Animal Science, Federal University of Viçosa, Viçosa 36570-900, Minas Gerais, Brazil.
Nova Mentis Limited, Nova UCD, Belfield Innovation Park, University College Dublin, Belfield, D04 F438 Dublin, Ireland.
Animals (Basel). 2023 Dec 28;14(1):119. doi: 10.3390/ani14010119.
The study aimed to evaluate the effects of dietary supplementation of hydroxytyrosol (HT) on performance, fat, and blood parameters of broilers. In total, 960 male chicks were distributed into four treatments groups with 12 replicates with 20 birds per pen, with varying HT levels (0, 5, 10, and 50 mg/kg of feed) added to the basal diet from 1 to 42 days old. Feed intake, body weight gain, and feed conversion ratio were evaluated. Enzymes related to liver injury were evaluated in blood. Fatty acid profile and malondialdehyde (MDA) concentration were determined in the breast meat. Dietary supplementation of HT did not improve broilers' performance ( > 0.05). Birds fed 50 mg HT/kg had lower AST, ALT, and GGT concentrations ( ≤ 0.05), whereas broilers fed 5, 10, and 50 mg HT/kg, had lower TBIL concentrations ( ≤ 0.05). Breast meat of broilers fed 50 mg HT/kg had lower lipid content, saturated fatty acid, unsaturated fatty acids, MDA concentrations ( ≤ 0.05), and polyunsaturated fatty acids ( < 0.0001). In summary, supplementation of 5, 10, and 50 mg HT/kg does not improve the performance of broilers, but the dose of 50 mg HT/kg helps the liver against inflammation and improves fat parameters.
本研究旨在评估日粮中添加羟基酪醇（HT）对肉鸡生产性能、脂肪及血液参数的影响。总共960只雄性雏鸡被分为四个处理组，每组12个重复，每栏20只鸡，从1日龄至42日龄在基础日粮中添加不同水平的HT（0、5、10和50毫克/千克饲料）。评估了采食量、体重增加和饲料转化率。检测了血液中与肝损伤相关的酶。测定了胸肉中的脂肪酸谱和丙二醛（MDA）浓度。日粮添加HT并未改善肉鸡的生产性能（P＞0.05）。饲喂50毫克HT/千克的鸡AST、ALT和GGT浓度较低（P≤0.05），而饲喂5、10和50毫克HT/千克的肉鸡TBIL浓度较低（P≤0.05）。饲喂50毫克HT/千克的肉鸡胸肉脂质含量、饱和脂肪酸、不饱和脂肪酸、MDA浓度较低（P≤0.05），多不饱和脂肪酸含量也较低（P＜0.0001）。总之，添加5、10和50毫克HT/千克并不能提高肉鸡的生产性能，但50毫克HT/千克的剂量有助于肝脏抵抗炎症并改善脂肪参数。
