Yang Tianyu, Feng Feifei, Zhan Kang, Ma Xiaoyu, Jiang Maocheng, Datsomor Osmond, Zhu Xinyu, Huo Yongjiu, Zhao Guoqi
Institute of Animal Culture Collection and Application, College of Animal Science and Technology, Yangzhou University, Yangzhou, China.
Wuxi Chenfang Biotechnology Co., Ltd., Wuxi, China.
Front Vet Sci. 2022 Jun 24;9:916625. doi: 10.3389/fvets.2022.916625. eCollection 2022.
The increased use of antibiotics continues to pose a threat to public health because of the increasing concern of antibiotic residue. Tea tree oil (TTO) is an extract of the Australian plant with anti-inflammatory and antioxidant properties. However, there is little information on TTO supplementation in the diet of finishing pigs. Hence, the present study aimed to investigate the effect of TTO supplemented diets on the growth performance, meat quality, serum biochemical indices, and antioxidant capacity of the finishing pigs. Our results showed that TTO supplementation increased ( < 0.05) the mRNA expression of insulin-like growth factors -I (IGFs-I), growth acceleration hormone (GH), and heart fatty acid-binding protein (H-FABP), while the mRNA expression of myostatin gene (MSTN), and calpain-1 (CAST) decreased by the TTO supplementation, compared with the control group. In addition, TTO supplementation increased ( < 0.05) serum alkaline phosphatase (ALP), immunoglobulin G (IgG), and IgM levels but decreased ( < 0.05) serum aspartate transaminase (AST) concentration, relative to the control group. In addition, we found that the live weight and intramuscular fat enhanced ( < 0.05) significantly, and muscle pH 24 min value, cooking loss, and shear force decreased ( < 0.05) dramatically in the TTO group. The TTO supplementation increased ( < 0.05) C18:2n6t concentration and decreased ( < 0.05) C12:0 and C16:0 concentration, relative to the control group. Dietary supplementation with TTO decreased ( < 0.05) malondialdehyde (MDA) and increased ( < 0.05) glutathione peroxidase (GSH-Px) activity in serum. These results indicated that TTO supplementation could improve immunity and antioxidant, carcass traits, the nutritional value of pork, and the antioxidant capacity of finishing pigs. Therefore, TTO has potential positive effects as a feed additive in the pig industry.
由于对抗生素残留的日益关注，抗生素使用的增加继续对公共卫生构成威胁。茶树油（TTO）是一种澳大利亚植物的提取物，具有抗炎和抗氧化特性。然而，关于育肥猪日粮中添加TTO的信息很少。因此，本研究旨在探讨添加TTO的日粮对育肥猪生长性能、肉质、血清生化指标和抗氧化能力的影响。我们的结果表明，与对照组相比，添加TTO可提高（P<0.05）胰岛素样生长因子-I（IGFs-I）、生长加速激素（GH）和心脏脂肪酸结合蛋白（H-FABP）的mRNA表达，而添加TTO可降低肌肉生长抑制素基因（MSTN）和钙蛋白酶-1（CAST）的mRNA表达。此外，与对照组相比，添加TTO可提高（P<0.05）血清碱性磷酸酶（ALP）、免疫球蛋白G（IgG）和IgM水平，但降低（P<0.05）血清天冬氨酸转氨酶（AST）浓度。此外，我们发现TTO组的活重和肌内脂肪显著提高（P<0.05），肌肉pH 24分钟值、蒸煮损失和剪切力显著降低（P<0.05）。与对照组相比，添加TTO可提高（P<0.05）C18:2n6t浓度，降低（P<0.05）C12:0和C16:0浓度。日粮中添加TTO可降低（P<0.05）血清丙二醛（MDA）含量，提高（P<0.05）血清谷胱甘肽过氧化物酶（GSH-Px）活性。这些结果表明，添加TTO可以提高育肥猪的免疫力、抗氧化能力、胴体性状、猪肉营养价值和抗氧化能力。因此，TTO作为猪产业中的饲料添加剂具有潜在的积极作用。
