Intake, growth, feed efficiency, carcass characteristics and selected meat quality traits of beef cattle offered a barley-based concentrate with increasing levels of palm kernel expeller meal

IF 1.9 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Livestock Science Pub Date : 2025-08-17 DOI:10.1016/j.livsci.2025.105804

M. McGee , D. Magee , E.G. O’Riordan , A.K. Kelly , A.P. Moloney

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Abstract

Two experiments were carried out to determine the effects of partial replacement of rolled barley (+soya bean meal) with palm kernel expeller meal (PK) - 0, 100, 200, 300 and 400 g/kg fresh weight - in the concentrate, offered for 70 days as a 3.0 kg DM supplement to grass silage (Experiment 1) or ad libitum (Experiment 2), on intake, growth, feed efficiency (Experiments 1 and 2), carcass traits and meat quality characteristics (Experiment 2) of steers. In Experiment 1, there was a tendency for a linear decrease in total DM intake as inclusion of PK increased, but live weight gain was unaffected. In Experiment 2, inclusion of PK had no effect on total DM intake but there was a linear decrease in live weight gain and slaughter weight, and a linear increase in feed conversion ratio, as PK inclusion increased. There was a tendency for a linear decrease in carcass weight as inclusion of PK increased. Concentrate treatment did not affect subcutaneous fat or M. Longissimus dorsi muscle colour, but had a minor negative effect on muscle fatty acid composition in terms of human nutrition. In conclusion, inclusion of PK had no impact on animal growth when the concentrate was offered as a supplement to grass silage, but negatively impacted growth-related performance when it was offered ad libitum. Inclusion of PK had no commercial impact on muscle and fat colour, and did not affect the total saturated fatty acid concentration in muscle when the concentrate was offered ad libitum.

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对采食量、生长、饲料效率、胴体特性和所选肉品质的肉牛，在添加棕榈仁粕水平的基础上饲喂大麦精料

本试验旨在研究在精料中以0、100、200、300和400 g/kg鲜重的棕榈仁粕（PK）部分替代大麦（+豆粕），作为3.0 kg干物质补充（试验1）或随意补充（试验2），饲喂70 d对阉牛采食量、生长、饲料效率（试验1和2）、胴体性状和肉质特性（试验2）的影响。在试验1中，随着PK添加量的增加，总干物质摄入量呈线性下降趋势，但活重增加不受影响。试验2中，PK添加量对DM采食量无影响，但随着PK添加量的增加，活增重和屠宰重呈线性降低，饲料系数呈线性升高。随着PK添加量的增加，胴体重呈线性下降趋势。浓缩物处理不影响皮下脂肪或背最长肌肌肉颜色，但对人体营养方面的肌肉脂肪酸组成有轻微的负面影响。综上所述，当精料作为青贮饲料的补充时，添加PK对动物的生长没有影响，而当随意添加PK时，则对动物的生长相关性能产生负面影响。在商业上，PK对肌肉和脂肪颜色没有影响，当浓缩物随意供应时，也不影响肌肉中总饱和脂肪酸浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Livestock Science 农林科学-奶制品与动物科学

CiteScore

4.30

自引率

5.60%

发文量

237

审稿时长

3 months

期刊介绍： Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.