本试验旨在研究饲粮中添加甜菜碱对断奶仔猪生长性能和血清生化指标的影响。选用体重(7.12±0.11) kg断奶后1周的"杜×长×大"仔猪160头,随机分为4组,每组4个重复,每个重复10头。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮上添加600、900、1 200 mg/kg甜菜碱的试验饲粮。试验期28 d。结果表明,饲粮中添加甜菜碱能够显著提高仔猪的平均日采食量和平均日增重(P<0.05),显著增加血清生长激素和胰岛素样生长因子Ⅰ的含量(P<0.05)。600 mg/kg甜菜碱显著降低了血清尿素氮和低密度脂蛋白含量(P<0.05)。但饲粮中添加甜菜碱对血清中总蛋白、白蛋白、甘油三酯、胆固醇、高密度脂蛋白含量和代谢酶的活性无显著影响(P>0.05)。由此可见,饲粮中添加甜菜碱可以提高断奶仔猪的生长性能,促进蛋白质的沉积和脂肪代谢,其中以添加量600 mg/kg效果最好。
This experiment was conducted to investigate the effects of dietary betaine on growth performance and serum biochemical parameters of weaner piglets. A total of 160 "Duroc×Yorkshire×Landrace" weaner piglets with an average body weight of (7.12±0.11) kg were randomly divided into 4 groups with 4 replicates per group and 10 piglets in each replicate. Piglets in control group were fed a basal diet, and the others in experimental groups were fed the basal diet supplemented with 600, 900 and 1 200 mg/kg betaine, respectively. The experiment lasted for 28 days. The results showed as follows: supplementation of betaine could significantly improve average daily feed intake and average daily gain (P<0.05), and significantly increase the contents of growth hormone and insulin-like growth factor Ⅰ in serum (P<0.05). The supplementation of 600 mg/kg betaine was significantly reduced the contents of serum urea nitrogen and low-density lipoprotein in serum (P<0.05). However, supplementation of betaine had no significant effects on the contents of total protein, albumin riglyeride, cholesterol, high-density lipoprotein in serum and metabolic enzyme activity (P>0.05). In conclusion, supplementation of betaine can improve growth performance of weaner piglets, promote protein deposition and fat metabolism, and the optimum supplemental level of betaine is 600 mg/kg.
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