| 日粮不同营养水平对牦牛生产性能、屠宰指标和血清生化指标的影响 |
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| 引用本文： | 张振宇,梁春年,姚喜喜,马晓明,丁考仁青,褚敏,吴晓云,包鹏甲,阎萍. 日粮不同营养水平对牦牛生产性能、屠宰指标和血清生化指标的影响[J]. 畜牧兽医学报, 2021, 52(1): 135-143. DOI: 10.11843/j.issn.0366-6964.2021.014 |
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| 作者姓名： | 张振宇 梁春年 姚喜喜 马晓明 丁考仁青 褚敏 吴晓云 包鹏甲 阎萍 |
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| 作者单位： | 1. 中国农业科学院兰州畜牧与兽药研究所, 兰州 730050;2. 甘南藏族自治州畜牧工作站, 合作 747000 |
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| 基金项目： | 农牧交错带牧繁农育关键技术集成示范项目(16190050);中国农业科学院牦牛资源与育种创新团队(CAAS-ASTIP-2014-LIHPS);甘肃省基础研究创新群体项目(20 JR5RA580)。 |
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| 摘 要： | 本试验旨在研究日粮营养水平对牦牛生产性能、屠宰指标和血清生化指标的影响.选择年龄、体重接近的健康公牦牛60头,平均体重(269.75士35.46)kg,随机分成3组,每组20个重复,每个重复1头牛.根据饲粮营养水平分为高营养水平组(HN)、中营养水平组(MN)、低营养水平组(LN).试验周期105 d,预试期15 d,...
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| 关 键 词： | 营养水平 牦牛 生产性能 屠宰性能 血清生化指标 |
| 收稿时间： | 2020-08-28 |
Effects of Different Nutrition Levels of Diets on Production Performance,Slaughter Indexes and Serum Biochemical Indexes of Yak |
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| ZHANG Zhenyu,LIANG Chunnian,YAO Xixi,MA Xiaoming,DING Kaorenqing,CHU Min,WU Xiaoyun,BAO Pengjia,YAN Ping. Effects of Different Nutrition Levels of Diets on Production Performance,Slaughter Indexes and Serum Biochemical Indexes of Yak[J]. Chinese Journal of Animal and Veterinary Sciences, 2021, 52(1): 135-143. DOI: 10.11843/j.issn.0366-6964.2021.014 |
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| Authors: | ZHANG Zhenyu LIANG Chunnian YAO Xixi MA Xiaoming DING Kaorenqing CHU Min WU Xiaoyun BAO Pengjia YAN Ping |
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| Affiliation: | 1. Lanzhou Institute of Animal Husbandry and Veterinary Medicine, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China;2. Gannan Tibetan Autonomous Prefecture Animal Husbandry Workstation, Hezuo 747000, China |
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| Abstract: | The study aimed to explore the effects of different dietary nutrition levels on production performance, slaughter indexes and serum biochemical indexes of yaks. Sixty healthy male yaks with the similar age and weight, the average weight was (269.75±35.46) kg, and the yaks were randomly divided into 3 groups, each 20 replicates, and each repeating 1 yak. According to the energy level of the diet, they were divided into high nutrition level (HN) group, medium nutrition level (MN) group, and low nutrition level (LN) group. The test period was 105 days, the pre-test period was 15 days, and the normal test period was 90 days. During the trial period (90 days), the total net energy (NEmf) of the diet was 5.51, 6.22, 6.94 MJ·kg-1, respectively. The crude protein level of the diet during the whole trial period was 16.98% for each group. Production performance was detected at the end of the fattening trial. 8 yaks from each gorup was randomly selected for the jugular vein to collect blood, the serum separated quickly, determined the blood biochemical indicators, and the slaughter performance and meat quality of each yak was determined after slaughter. The experiment redults showed that the dietary nutrition level had no significant effect on the average daily gain (ADG) of the yak (P>0.05). However, with the increase of the feed nutrition level, the serum glucose content of the HN group was the highest, which was compared with the LN group and the MN group, increased by 38.86% and 29.69%, respectively (P<0.05). The MN group had the lowest serum urea content, which was 34.31% lower than the LN group (P<0.05), but the difference was not significant compared with the HN group. The content of total protein in serum decreased with the increase of energy level (P<0.05). The LN group had the lowest total cholesterol content, which was 10.98% lower than the MN group. With the increase of energy level, the pre-slaughter live weight, carcass weight and eye muscle area of the yak in the HN group were extremely significantly higher than those in the MN and LN groups (P<0.01); the slaughter rate in the HN group was significantly higher than that in the MN and LN groups (P<0.05). The meat color L* value was the lowest in the LN group (P<0.05), which was 17.84% and 25.65% lower than the MN and HN groups, respectively. There was no significant difference in water lossing rate and cooking loss among different groups (P>0.05). Under the conditions of this experiment, adding energy is feasible to improve growth performance and meat quality of yak in house. The comprehensive growth performance, slaughter performance, meat quality and serum biochemical indexes are obtained. When the comprehensive net energy level of the diet is 6.94 MJ·kg-1, the nutritional level of the diet is more suitable for cold-season house feeding and fattening, which can provide the energy level required for high-quality yak meat. |
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| Keywords: | nutrition levels yak production performance slaughter performance serum biochemical index |
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