摘要
选用平均体重为41 kg左右的"长大"二元杂交猪54头,按公母各半、体重相近的原则,随机分为3组,每组18头试验猪只,每组3个重复,每个重复6头猪。按照美国NRC(1998)的标准配制,对照组蛋白为18.0%,试验组Ⅰ和试验组Ⅱ在对照组日粮基础上粗蛋白浓度分别减少至16.5%和15.5%,试验组相应补充赖氨酸、苏氨酸和蛋氨酸。结果表明,与对照组相比,虽然试验组Ⅰ和试验组Ⅱ的平均日增重分别下降了0.97%和1.73%,但差异不显著(P>0.05);试验组Ⅰ和试验组Ⅱ的饲料转化率提高,与对照组相比,料肉比分别降低了11.32%和11.72%,但差异不显著(P>0.05);试验猪只的血清尿素氮浓度分别降低6.14%和25.24%,差异显著(P<0.05)。由此结果说明,蛋白含量15.5%的低蛋白日粮组更能充分利用饲料中的氮源,保证猪只的正常生长性能的发挥。
Fifty four crossbred growing pigs （Landrace × Large White） with an average body weight of 41 kg were randomly assigned to 3 treatment groups （3 duplicates, 6 pigs per duplicate） by a randomized complete block design. The feed formulation included 18.0% crude protein in accordance with NRC （1998） standards. The protein content was reduced to 16.50% for Treatment Ⅰ and 15.50 % for Treatment Ⅱ. The dietary was added synthetic lysine, methionine and threonine according to the ideal model. As compared to the control group , the average daily weight gain reduced 0.97 % for Treatment Ⅰ, and 1. 70% for Treatment Ⅱ （P〉0. 05）; Feed conversion rate were improved by 11.32 %（P〉0.05） in Treatment Ⅰ and Ⅱ. 70% in Treatment Ⅱ （P〉0.05）; and, the serum urea nitrogen decreased by 6. 14% in Treatment Ⅰ （P〈0. 05） and 25.24% in Treatment Ⅱ（P〈0.05）. No significant difference among treatments was found on total protein and albumin in serum（P〉0.05）. This shows low protein diets can keep growth performance and take full advantage of nitrogen source to the body.
出处
《现代畜牧兽医》
2016年第3期18-21,共4页
Modern Journal of Animal Husbandry and Veterinary Medicine
关键词
低蛋白日粮
育肥猪
生长性能
血清尿素氮
Finishing pigs
Low protein diets
Growth performance
Serum parameters
