清洁型复合饲料添加剂对发酵床育肥前期猪生长、营养代谢及激素分泌的影响

Effects of No-antibiotics Feeds on Growth_Performance,Nutrient Metabolism and Endocrine Hormone in Pre-fattening Pigs of Microbial Fermentation Bed System

选取健康无病、体重30kg左右的苏钟猪120头,随机分为2组,研究发酵床育肥前期猪日粮中应用清洁型复合饲料添加剂对猪生长性能、营养物质代谢及激素分泌的影响。结果表明:(1)清洁饲粮组体重、平均日增重和料重比较对照组无显著差异(P>0.05)。(2)清洁型复合饲料添加剂组血清总蛋白及白蛋白较对照组均有提高,但差异不显著(P>0.05);甘油三酯含量较对照组降低了58.82%(P<0.01),而葡萄糖、胆固醇、高密度胆固醇及低密度胆固醇差异不显著(P>0.05);清洁型复合饲料添加剂对血清中酶活性的变化无显著性影响,但谷丙转氨酶及谷草转氨酶都有提高的趋势(P>0.05)。(3)清洁饲粮组血清中T3和T4含量均显著提高,其中T3和T4含量分别较对照组提高了18.12%和18.84%(P<0.05),IGF-Ⅰ、INS和GH含量较对照组也有提高的趋势,但差异不显著(P>0.05)。以上结果表明,在发酵床育肥前期猪日粮中应用清洁型复合饲料添加剂,可提高猪的生长性能,改善营养物质代谢水平,降低血清中甘油三酯的含量,并提高猪血清中T3、T4的含量,改善猪体内内分泌激素的水平。

To investigate the growth performance, nutrient metabolism and hormone in pre-fattening pig of microbial fermentation bed system without antibiotics feed, 120 Suzhong pigs （30kg） were randomly allotted to 2 treatments with 4 replicates per treatment. The results showed that （1） there was no significant change in body weight among pigs, the average daily gain increased by 4.76% （P〉0.05）, and the gain/feed ratio decreased by 1.72% （P〉0.05）. （2） Compared with the control group, there was a slight increase in the content of serum total protein （TP） and albumin （ALB） （P〉0.05） ; the serum triglyceride （TG） content of pigs without antibiotics fed diet reduced dramatically by 58.82% （P〈0.01）; the activity of serum alanine aminotransferase and aspartate aminotransferase were increased but there was no significant difference （P〉0.05）. （3） The concentrations of triiodothyronine （T3） and thyroxine （T4） were improved significantly in those without antibiotics feeds, which increased by 18.12G and 18.84% respectively （P〈0.05）, there was also an increase in the concentration of insulin-like growth factors （IGF-1）, insulin （INS） and growth hormone （GH）, but the changes were not significant （P〉0.05）. The above results suggested that feeds without antibiotics applied in pre-fattening pigs of microbial fermentation bed system improved the growth performance, the level of nutrient metabolism, the concentrations of T3 and T4, and the level of endocrine hormones in serum, while it reduced the concentration of serum TG.