日粮中外源纤维素酶添加水平对舍饲牦牛屠宰性能和肉品质的影响

发布时间：2019-01-12 07:39

【摘要】：【目的】本试验旨在探究不同外源纤维素酶(Exogenous Fibrolytic Enzymes,EFE)添加水平对舍饲牦牛体尺指标、屠宰性能、器官指数和肉品质的影响。【方法】采用单因素试验设计,试验因素为EFE的添加水平(0、0.2、0.4 g/kg日粮干物质),选取24头年龄为4周岁左右的麦洼公牦牛,根据体重按照随机区组试验设计分为3个处理组(分别记为Con+0,Con+0.2和Con+0.4组),每个处理8个重复,每个重复1头牛。【结果】结果表明:(1)Con+0.2和Con+0.4组牦牛的胸围显著高于对照组(P=0.01),Con+0.4组的体高有高于其余两组的趋势(P=0.09);(2)Con+0.4组牦牛的肉骨比(P=0.066)和净肉率(P=0.072)有高于对照组的趋势;(3)随着EFE添加量的提高,牦牛的瘤胃的器官指数随之提高(P=0.006);(4)各处理牦牛肌肉p H值熟肉率、滴水损失率和常规营养指标差异均不显著(P0.05);(5)Con+0.4组牦牛的肌肉胱氨酸含量显著低于其余2组(P=0.025),但脯氨酸含量则显著高于其余两组(P=0.015)。【结论】因此,本试验条件下,日粮中EFE提高了牦牛胸围和净肉率,对肉质无显著影响,以0.4g/kg的添加量较优。
[Abstract]:[objective] to investigate the effects of different levels of exogenous cellulase (Exogenous Fibrolytic Enzymes,EFE) on body size, slaughter performance, organ index and meat quality of yak. [methods] A single factor experiment was used to study the effects of different levels of exogenous cellulase (Exogenous Fibrolytic Enzymes,EFE) on body size, slaughter performance, organ index and meat quality of yak. The experimental factor was EFE supplementation level (0 0. 2 + 0. 4 g/kg diet dry matter). 24 male yaks aged about 4 years were selected and divided into three groups according to their body weight according to the randomized block design (Con 0, respectively). Con 0.2 and Con 0.4 groups, 8 replicates per treatment and 1 cow per replica. [results] the results showed that: (1) the chest circumference of Yak in Con 0.2 and Con 0.4 groups was significantly higher than that in control group (P0. 01). The body height of Con 0.4 group was higher than that of the other two groups (P0. 09). (2) the ratio of meat to bone (P0. 066) and net meat rate (P0. 072) in Con 0. 4 group were higher than those in control group, (3) with the increase of EFE, the rumen organ index of yak increased (P0. 006). (4) there was no significant difference in the percentage of cooked meat, the loss rate of drip water and the nutritional index of yak muscle (P0.05). (5) the content of cystine in the muscle of Con 0.4 group was significantly lower than that of the other two groups (P0. 025), but the content of proline was significantly higher than that of the other two groups (P0. 015). Dietary EFE increased the chest circumference and net meat rate of yak, but had no significant effect on meat quality. The addition of 0.4g/kg was the best.
【作者单位】：西南民族大学生命科学与技术学院;四川省阿坝州畜牧工作站;
【基金】：阿坝州应用技术研究与开发-牦牛优质高效、规模化健康养殖模式的研究与推广应用;西南民族大学2015年研究生“创新型科研项目”(CX2015SZ085)
【分类号】：S823.85

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