摘要
本试验旨在探讨日粮中全棉籽替代棉籽饼和棉油对肥育阉牛肉用性能的影响。试验选取40头体况良好、平均初始体质量为(454.37±42.42)kg的利木赞杂交阉牛,随机分为4组,每组10头牛,分别饲喂4种不同全棉籽含量的精饲料(对照组0%,低全棉籽组7.1%,中全棉籽组13.5%,高全棉籽组22.0%),育肥期90d。结果表明,日粮中全棉籽含量对肉牛干物质采食量、肉骨比、优质肉块百分比、pH、肌肉、肾脏、肺脏中棉酚残留量及血清生化指标无显著影响(P>0.05);对肉牛日增体质量、胴体质量、屠宰率、净肉率、眼肌面积、背膘厚、饲料报酬、饲料成本、肝脏和心脏中棉酚残留量、剪切力、肉色等常规成分有显著影响(P<0.05);日粮全棉籽含量为22.0%时,胴体质量、屠宰率、净肉率、肉骨比、眼肌面积、优质肉块质量、肌间脂肪在4个试验组中最低。结果表明,育肥阉牛日粮中用全棉籽替代棉籽饼和棉籽油会提高肉牛的生长速度,但会降低屠宰性能和胴体品质。
The study was conducted to investigate the effects of different levels of the whole cot- tonseed taking the place of the cottonseed cake in the diets on meat performance in fattening Lim- monsin crossbred steers. Forty healthy steers with similar weight (454.37±42.42)kg were ran- domly atlocated to four treatments with ten replicates each and one steer in each replicate, precise feeding concentrates with different levels of the whole cottonseed during the 90 days finishing periods. The results showed that the different levels of the whole cottonseed in diet had no signi- fication influence on feed intake, the ratio of bone and meat, the percentage of the fine quality beef, pH, gossypol residue in muscle, kidney and lung, serum biochemical indexes(P〉0.05). With the levels of the whole cottonseed in concentrates changed, the average daily again(ADG), carcass weight, dressing percentage, net meat percentage, LM area, backfat thickness, feed con- version efficiency, shear stress, gossypol residue in liver and heart, meat color had changed significantly(P〈O. 05). When the content of the whole cottonseed reached 22. 0%, the carcass weight, dressing percentage, net meat percentage, ratio of meat and bone, LM area, high per- centage of the beef, the intermuscular fat was the lowest. In conclusion, the whole cottonseed replacing cottonseed cakes and oil in fattening crossbred steers' diets had no effect on rapidly fat- tening, but it depressed carcass quality.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2012年第10期1582-1588,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家现代农业产业技术体系(肉牛)
省应用创新项目"优质高档肉牛生产技术研究"
关键词
全棉籽
生产性能
胴体性状
阉牛
the whole cottonseed
production performance
carcass quality
steer