日粮添加赖氨酸和盐酸吡格列酮对育肥猪生产性能、血清生化指标及肉品质的影响

【目的】研究日粮添加赖氨酸(Lysine,Lys)和盐酸吡格列酮(Thiazolidinedione,TZD)对肥育猪生产性能、血清生化指标及肉品质的影响。【方法】选用160头体质量均一体质量=(92.25±0.91)kg]、健康的杜×长×大三元杂肥育猪,随机分成4个处理,每个处理5个重复,每个重复8头猪(公母各半)。对照组饲喂基础日粮w(Lys)为0.85%],试验组Ⅰ为基础日粮+15 mg·kg~(–1) TZD,试验组Ⅱ为基础日粮+w为0.20%Lys+15 mg·kg~(–1) TZD,试验组Ⅲ为基础日粮+w为0.40%Lys+15 mg·kg~(–1) TZD。试验结束后从对照组和试验组Ⅲ每重复选取1头公猪进行屠宰,评定其屠宰性能及肉品质。【结果】与对照组相比,在第28天,试验组Ⅲ日增质量提高9.45%(P=0.055);在第14天,试验组Ⅲ血清高密度脂蛋白含量显著高于对照组,提高了22.81%(P0.05);在第28天,试验组Ⅲ瘦肉率及背最长肌肉色红度(a*值)均显著高于对照组,分别提高了7.04%和4.11%(P0.05)。【结论】日粮添加Lys质量分数为0.40%(总Lys质量分数为1.25%)和15 mg·kg~(–1)的TZD可增加肥育猪的日增质量和瘦肉率,并改善肌肉的红度。

Effects of dietary supplementation with lysine and thiazolidinedione on growth performance, serum biochemical parameters and meat quality in finishing pigs

Objective]To determine the effects of dietary supplementation with lysine (Lys) and thiazolidinedione(TZD) on growth performance, serum biochemical parameters and meat quality in finishing pigs.Method]A total of 160 healthy Duroc × Landrace × Large White pigs with similar weight (92.25±0.91) kg] were randomly divided into four groups with five replicates in each group and eight pigs per replicate (50%males and 50% females). Control group was fed with basic diet (containing 0.85% Lys), experimental group Ⅰwas fed with basic diet and 15 mg·kg–1 TZD, experimental group Ⅱ was fed with basic diet, extra 0.20% Lys and 15 mg·kg–1 TZD, experimental group Ⅲ was fed with basic diet, extra 0.40% Lys and 15 mg·kg–1 TZD. After feeding experiment, the slaughter performance and meat quality were evaluated by selecting one hog from each replicate of the control group and experimental group Ⅲ. Result]The average daily gain (ADG) enhanced 9.45% in experimental group Ⅲ on day 28 compared with control group (P=0.055). The high-density lipoprotein content in experimental group Ⅲ was 22.81% higher than that in control group (P<0.05) on day 14. The lean percentage and a* value of longissimus dorsi muscle in experimental group Ⅲ were 7.04% and 4.11%higher compared to control group (P<0.05) on day 28, respectively. Conclusion]Finishing pigs fed with basic diet supplemented with 0.40% Lys (totally 1.25% Lys) and 15 mg·kg–1 TZD could increase ADG and lean percentage, and improve meat colour.