摘要
试验旨在研究日粮中添加不同剂量的叶酸对断奶仔猪生长性能及血清和组织中蛋白质代谢相关指标的影响。试验选择25日龄断奶仔猪160头(80头纯种大白和80头纯种长白,公、母各半),随机分为5个处理组,每个处理4个重复,每个重复8头猪,进行28 d的饲养试验。5种日粮分别在基础日粮上添加0、0.5、2.5、5 mg/kg和10 mg/kg叶酸。结果表明:添加2.5 mg/kg叶酸仔猪的全期日增重较基础日粮组有显著提高(P<0.05),提高了血清蛋白质浓度(P<0.05),降低了血清尿素氮浓度(P<0.01),并提高了肝脏DNA、RNA和蛋白质的含量(P<0.05)以及肌肉RNA/DNA和RNA/蛋白质值(P<0.05),而添加更高水平叶酸时却使仔猪生长性能下降。本试验结果显示,仔猪日粮中叶酸适宜添加量为2.5 mg/kg,叶酸不足或者过高都将影响动物的生长。
The experiment was conducted to determine the effects of dietary supplementation of folic acid on growth performance and indicators related with protein metabolism of serum and tissues in piglets. A total of 160 piglets at the age of 25 days were randomly divided into 5 treatments, each treatment consisted of 4 replicates with 8 piglets. The five treatments were fed with the basal diet supplemented with 0, 0.5, 2.5, 5 and 10mg/kg folie acid. The experiment lasted for 28 days. The results showed that pigs fed basal diet supplemented with 2.5 mg/kg folie acid grew faster than those of control group （P 〈 0.05）. The supplementation of 2.5 mg/kg folic acid to the diet increased serum protein concentrations （P 〈 0.05） and reduced serum urea nitrogen concentration （P 〈 0.01）. Moreover, the addition of 2.5 mg/kg folio acid to diet improved the liver DNA, RNA and protein content （P 〈 0.05）, and muscle RNA/DNA and RNAJprotein value （P 〈 0.05）. However, excessive folio acid supplementation would decline growth performance. So, the optimum folic acid supplementation for piglets was 2.5 mg/kg, insufficient or too much folic acid will affect the growth of animals.
出处
《中国畜牧杂志》
CAS
北大核心
2011年第5期24-28,共5页
Chinese Journal of Animal Science
基金
中国高校创新研究团队项目(IRT0555)
关键词
叶酸
生长性能
蛋白质代谢
断奶仔猪
folic acid
growth performance
protein metabolism
piglets
