【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。更多还原

【Abstract】 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 group Ⅱ were 8.69% and 1.17% than higher group Ⅲ and group Ⅰ;beef flavour AA of group Ⅱ were 14.29%and 19.01% higher than group Ⅲ and group Ⅰ,higher than group Ⅰ and group Ⅲ. 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.更多还原