摘要
为研究不同能量蛋白比对贵州杂交肉牛屠宰和肉质性状的影响,试验用43头1.5岁左右、体重(230.24±44.16)kg的杂交牛随机分为3组,分别饲喂能量蛋白质比为21.57、24.97和27.11的日粮,经过90 d肥育后进行屠宰测定和肉质性状分析。结果表明:3组牛的屠宰率等指标组间差异不显著(P> 0.05);但试验Ⅱ组的肉骨比较试验Ⅰ、Ⅲ组分别高19.00%、5.87%,差异显著(P <0.05);熟肉率以试验Ⅰ组(71.11%)最高,试验Ⅲ组(59.64%)最低,组间差异极显著(P <0.01);试验Ⅱ组牛肉的氨基酸总量比Ⅲ、Ⅰ组分别高8.69%和1.17%;牛肉的鲜味氨基酸总量以试验Ⅱ组最高,分别比试验Ⅰ、Ⅲ组高4.29%和19.01%。从而可见,贵州杂交肉牛在保证一定能量和蛋白质摄入量的条件下,能量蛋白比的变化对肉牛屠宰性能和肉质性状没有明显的影响。
To study the effection of different energy-protein ratio on slaughter traits and meat quality of Guizhou crossbred beef cattle,43 crossbred beef cattles that were about 1.5 years old,(230.24±44.16)kg weight were selected and divided into 3 groups according to completely randomized experimental design.The cattles were supplied different diets of energy-protein ratio,3 groups were 21.57,24.97 and 27.11.The experiment lasted 90 d.The results showed that there was no significant difference in slaughter rate among groups(P>0.05).But the ratio of muscle to bone of group II were 19.00%and 5.87%higher than those of group I and group III respectively(P<0.05).The rate of cooking were 71.11%,68.32%and 59.64%(P<0.01),beef total AA of groupⅡwere 8.69%and 1.17%than higher groupⅢand groupⅠ;beef flavour AA of groupⅡwere 14.29%and 19.01%higher than groupⅢand groupⅠ,higher than groupⅠand groupⅢ.Therefore,under the condition of ensuring a certain amount of energy and protein intake,the change of energy-protein ratio has no obvious influence on the slaughter performance and meat quality of Guizhou crossbred beef cattle.
作者
杨玉能
夏先林
韩勇
YANG Yuneng;XIA Xianlin;HAN yong(Zunyi Vactional and Technology College,Zunyi,Guizhou Province 563000,China;Guizhou University,Guiyang,Guizhou Province 550025,China;Guizhou Institute of Animal Husbandry and Veterinarian,Guiyang,Guizhou Province 550005,China)
出处
《中国饲料》
北大核心
2020年第9期87-90,共4页
China Feed
基金
贵州省重大科技专项“贵州草地生态畜牧业关键技术研究及集成示范”(黔科合重大专项字[2011]6009号)。
关键词
能量蛋白比
贵州杂交肉牛
屠宰性能
肉质性状
energy-protein ratio
Guizhou crossbred beef cattle
slaughter traits and meat quality
