Zhang Dongqiang, Chu Min, Ge Qianyun, Yan Ping, Bao Pengjia, Ma Xiaoming, Guo Xian, Liang Chunnian, Wu Xiaoyun
Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China.
Institute of Western Agriculture, Chinese Academy of Agricultural Sciences, Changji 831100, China.
Foods. 2024 Aug 14;13(16):2527. doi: 10.3390/foods13162527.
Energy feed can provide animals with balanced nutrition, thereby enhancing their growth performance. This study aimed to evaluate the effects of dietary energy levels on the growth performance, serum metabolites, and meat quality of Jersey cattle-yaks. A total of 24 male Jersey cattle-yaks were randomly divided into three groups. Each group was fed diets with metabolizable energy levels of 8.21 MJ/kg (LE), 9.50 MJ/kg (ME), and 10.65 MJ/kg (HE), respectively. The HE and ME groups showed significantly higher final body weight, average daily gain (ADG), and feed efficiency compared to the LE group ( < 0.05). The glucose (GLU) and total cholesterol (TC) concentrations were significantly increased in the serum of the ME and HE groups ( < 0.05). The low-density lipoprotein cholesterol (LDL-C) and alanine aminotransferase (ALT) levels were significantly higher in the serum of the HE group than in the ME group ( < 0.05). Blood urea nitrogen (BUN) levels exhibited a significant decrease with increasing metabolizable energy levels in the diet ( < 0.05). Increasing dietary energy levels enhances the eye muscle area and intramuscular fat content of Jersey cattle-yaks ( < 0.05), with no effect on pH45 min, pH24 h, and shear force. In the HE group, the levels of heneicosanoic acid (C21:0), palmitoleic acid (C16:1), elaidic acid (C18:1n9t), and eicosadienoic acid (C20:2n6) were notably elevated ( < 0.05) when compared to the LE group. We concluded that a higher dietary energy level enhanced the growth performance and meat quality traits of male Jersey cattle-yaks.
能量饲料可以为动物提供均衡的营养，从而提高它们的生长性能。本研究旨在评估日粮能量水平对泽西牛 - 牦牛生长性能、血清代谢物和肉质的影响。总共24头雄性泽西牛 - 牦牛被随机分为三组。每组分别饲喂代谢能水平为8.21 MJ/kg（低能量组，LE）, 9.50 MJ/kg（中等能量组，ME）和10.65 MJ/kg（高能量组，HE）的日粮。与低能量组相比，高能量组和中等能量组的末体重、平均日增重（ADG）和饲料效率显著更高（P < 0.05）。中等能量组和高能量组血清中的葡萄糖（GLU）和总胆固醇（TC）浓度显著升高（P < 0.05）。高能量组血清中的低密度脂蛋白胆固醇（LDL-C）和丙氨酸氨基转移酶（ALT）水平显著高于中等能量组（P < 0.05）。随着日粮中代谢能水平的增加，血尿素氮（BUN）水平显著降低（P < 0.05）。提高日粮能量水平可增加泽西牛 - 牦牛的眼肌面积和肌内脂肪含量（P < 0.05），对pH45分钟、pH24小时和剪切力没有影响。与低能量组相比，高能量组中的二十一烷酸（C21:0）、棕榈油酸（C16:1）、反油酸（C18:1n9t）和二十碳二烯酸（C20:2n6）水平显著升高（P < 0.05）。我们得出结论，较高的日粮能量水平可提高雄性泽西牛 - 牦牛的生长性能和肉质性状。
