Alemu Tewodros, Dagnachew Alemu, Tsegaye Alemu
Department of Animal Science, College of Agriculture, Wollo University, Dessie Campus, Dessie, Ethiopia.
Sekota Dry land Agriculture Research Center, Livestock Directorate Program, Sekota, Ethiopia.
Transl Anim Sci. 2020 Aug 8;4(3):txaa149. doi: 10.1093/tas/txaa149. eCollection 2020 Jul.
The experiment was conducted using 36 intact yearling males of Abergelle breed and Abergelle cross bred goats (50%) with initial live weight of 18.92 ± 0.72 kg (mean ± SE). The objective of the experiment was to evaluate the effect of concentrate supplementation on carcass parameters and meat sensory quality of genotypes. Goat genotypes were blocked based on initial body weight and were randomly assigned to dietary treatments. The experimental design was 2 by 3 factorial in randomized complete block design. The treatments included local grass hay as basal diet and supplementation with concentrate (184, 368, and 552 g/d on DM basis). Effects of genotype and diet were significant on the main carcass parameters ( < 0.05) but genotype did not show effect on edible offal components ( > 0.05). Diet had a significance effect on meat flavor ( < 0.05) but not on tenderness, juiciness, and soup flavor ( > 0.05). Genotype had no effect ( > 0.05) on all sensory attributes. Goats feeding on higher level of concentrate had heavier total edible offal components ( < 0.05) than feeding on lower level of concentrates but not difference between genotypes ( > 0.05). The cross breed goats feeding on higher level of concentrate showed higher percentage of nonedible offal ( < 0.01) particularly gut content, foreleg, and hind leg than pure breed and lower level of concentrate. The digestibility and chemical composition of meat of the genotypes were not addressed in the experiment and hence need to be studied further.
该实验使用了36头阿贝盖尔品种及50%阿贝盖尔杂交品种的一岁成年雄性山羊,初始体重为18.92±0.72千克(均值±标准误)。实验目的是评估补充精饲料对不同基因型山羊胴体参数及肉品感官品质的影响。山羊基因型根据初始体重进行分组,并随机分配到不同日粮处理组。实验设计为随机完全区组设计中的2×3析因设计。处理包括以当地禾本科干草为基础日粮,并补充精饲料(干物质基础下分别为184、368和552克/天)。基因型和日粮对主要胴体参数有显著影响(P<0.05),但基因型对可食内脏成分无影响(P>0.05)。日粮对肉的风味有显著影响(P<0.05),但对嫩度、多汁性和汤味无影响(P>0.05)。基因型对所有感官属性均无影响(P>0.05)。采食较高水平精饲料的山羊,其可食内脏总成分比采食较低水平精饲料的山羊更重(P<0.05),但不同基因型之间无差异(P>0.05)。采食较高水平精饲料的杂交山羊,其不可食内脏比例(P<0.01),尤其是肠道内容物、前腿和后腿,比纯种山羊和采食较低水平精饲料的山羊更高。实验未涉及基因型肉品的消化率和化学成分,因此需要进一步研究。