摘要
本文旨在研究低蛋白质平衡氨基酸饲粮对生长猪生长性能、胴体品质、肌肉品质和肠道健康的影响。试验采用单因素完全随机设计,选择初始体重为(17.02±1.40)kg的健康"杜×长×大"三元杂交去势公猪16头,随机分为正常蛋白质组(饲粮粗蛋白质水平为18%,标准回肠可消化赖氨酸含量为0.93%)和低蛋白质组(饲粮粗蛋白质水平为14%,标准回肠可消化赖氨酸含量为1.03%)2个组,每组8个重复,每个重复1头猪。试验期共39 d。在试验结束当天对生长猪进行称重、结料和采血,并屠宰所有生长猪用于测定胴体品质、肌肉品质、肠道形态及消化酶活性。结果表明:与正常蛋白质饲粮相比,低蛋白质平衡氨基酸饲粮显著提高了生长猪背最长肌的亮度值(P<0.01)和黄度值(P<0.05);对小肠各肠段的绒毛形态无显著影响(P>0.05),但有提高空肠绒毛高度和隐窝深度比值的趋势(P=0.09);对生长猪的生长性能、胴体品质和肌肉品质无显著影响(P>0.05)。本试验结果表明,与正常蛋白质饲粮相比,标准回肠可消化赖氨酸含量为1.03%的低蛋白质平衡氨基酸饲粮能够维持生长猪正常生长性能,并有改善肠道健康状况的趋势。
The aim of this study was to investigate the growth performance,carcass characteristic,meat quality and intestinal health of growing pigs fed low protein diets balanced with amino acids.Sixteen growing pigs were all randomly allocated to 2 groups of a normal protein diet(dietary crude protein content was 18%,and standardized ileal digestible lysine was 0.93%) and a low protein diet(dietary crude protein content was 14%,and standardized ileal digestible lysine was 1.03%),and each group has 8 replicates and 1 pig per replicate.The experiment lasted for 39 d.The results showed that compared with the normal protein diet,lightness and yellowness of longissimus muscle of growing pigs received the low protein diet balanced with amino acids were significantly increased(P<0.05 or P<0.01).Dietary protein content had no effect on the villus morphology among different intestinal positions,but there was a trend of increasing villus height/crypt ratio with protein content reducing(P=0.09).There was no significant difference in growth performance,carcass characteristic and meat quality between the 2 groups(P>0.05).In conclusion,compared with the normal protein diet,growing pigs fed the low protein diet(dietary standardized ileal digestible lysine is 1.03%) balanced with amino acids obtain similar growth performance.Moreover,reducing dietary protein content shows an improve trend for intestinal health status of growing pigs.
出处
《动物营养学报》
CAS
CSCD
北大核心
2012年第12期2326-2334,共9页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家“十一五”科技支撑计划(2006BAD12B02)
动物营养需要动态模型技术研究(2006BAD12B02)
关键词
生长猪
低蛋白质平衡氨基酸饲粮
胴体品质
肠道健康
growing pig
low protein diet balanced with amino acids
carcass characteristic
intestinal health
