饲粮苏氨酸水平对北京雏鸭生长性能、胴体品质、免疫机能和血清激素的影响

发布时间：2018-05-12 16:36

本文选题：苏氨酸 + 雏鸭　；参考：《动物营养学报》2017年06期

【摘要】：本试验旨在研究饲粮苏氨酸水平对北京雏鸭生长性能、胴体品质、免疫机能和血清激素的影响。选取320只1日龄健康的北京鸭公鸭,随机分为5组,每组8个重复,每个重复8只。各组饲粮中苏氨酸水平实测值分别为0.65%(对照)、0.69%、0.81%、0.88%和0.98%,试验期为21 d。结果表明:1)饲粮苏氨酸水平对雏鸭平均日增重和平均日采食量有极显著影响(P0.01),对照组雏鸭平均日增重和平均日采食量显著低于其他各组(P0.05)。2)饲粮苏氨酸水平对雏鸭胸肌率有显著影响(P0.05),对照组雏鸭胸肌率显著低于0.69%、0.81%、0.88%水平组(P0.05)。3)饲粮苏氨酸水平对雏鸭法氏囊指数、脾脏指数、胸腺指数影响不显著(P0.05)。饲粮苏氨酸水平对雏鸭法氏囊重和胸腺重有极显著影响(P0.01),对照组雏鸭法氏囊重显著低于其他各组(P0.05),对照组雏鸭胸腺重显著低于0.81%、0.88%水平组(P0.05)。4)饲粮苏氨酸水平对雏鸭血清三碘甲腺原氨酸(T3)含量有显著影响(P0.05),0.81%水平组的血清T3含量最高,显著高于对照组和0.98%水平组(P0.05)。5)苏氨酸需要量分别与平均日采食量、平均日增重和胸肌率呈二次曲线关系,并当三者达到最高值时北京雏鸭的苏氨酸需要量分别为0.860%、0.852%和0.837%。由此可见,饲粮中添加适宜水平的苏氨酸可提高雏鸭生长性能、胴体品质和免疫机能。
[Abstract]:The purpose of this study was to study the effects of dietary threonine on growth performance, carcass quality, immune function and serum hormones of Beijing ducklings. 320 healthy Beijing duck ducks were randomly divided into 5 groups with 8 replicates in each group. The measured values of threonine in diet of each group were 0.65 (0.690.690.81% and 0.98% respectively), and the experimental period was 21 days. The results showed that the dietary threonine level had a significant effect on the average daily gain and average daily intake of ducklings, while the average daily gain and average daily intake of the control group were significantly lower than those of the other groups. The breast muscle rate of the control group was significantly lower than that of the control group (0.69%, 0.88%), and the dietary threonine level had a significant effect on the bursa index of ducklings. The spleen index and thymus index had no significant effect on P0.05. Dietary threonine level had a significant effect on bursa weight and thymus weight of ducklings. The weight of bursa of the control group was significantly lower than that of other groups (P 0.05). The thymus weight of the control group was significantly lower than 0.88% of the control group (P 0.05N. 4) the dietary threonine level had a significant effect on ducklings. Serum triiodothyronine (T3) content had a significant effect on the serum T3 content in the group of 0.85% of P0.05 and 0.81%. The threonine requirement was significantly higher than that of the control group and 0.98% group (P 0.05 路5). The threonine requirement of Beijing ducklings was 0.860% 0.85 2% and 0.837%, respectively. It can be seen that the suitable level of threonine in diet can improve the growth performance, carcass quality and immune function of ducklings.
【作者单位】：中国农业科学院北京畜牧兽医研究所动物营养国家重点实验室;
【基金】：中国农业科学院鸭营养与创新团队国家“十三五”重点研发课题(2016YFD0700205,2016YFD0700201)
【分类号】：S834.5

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