产蛋高峰期临武鸭苏氨酸需要量

发布时间：2018-12-21 19:54

【摘要】：本试验旨在研究饲粮中苏氨酸水平对30~38周龄临武鸭产蛋性能、蛋品质和血清生化指标的影响,以确定临武鸭产蛋高峰期的苏氨酸需要量。试验选取体重相近,健康状况良好、产蛋率无显著差异(P0.05)的临武鸭200只,随机分为5组,每组5个重复,每个重复8只鸭。各组饲粮中苏氨酸水平分别为0.55%、0.60%、0.65%、0.70%和0.75%。试验期63 d。结果表明:1)0.65%苏氨酸水平组的料蛋比显著低于0.55%苏氨酸水平组(P0.05)。饲粮中苏氨酸水平对平均日采食量、产蛋率、平均蛋重和日产蛋量均无显著影响(P0.05)。2)0.65%、0.70%和0.75%苏氨酸水平组的蛋白高度和哈氏单位显著高于0.55%苏氨酸水平组(P0.05)。饲粮中苏氨酸水平对蛋形指数、蛋壳厚度、蛋黄色泽、蛋黄比例、蛋壳比例和蛋白比例均无显著影响(P0.05)。3)0.70%苏氨酸水平组血清中总蛋白含量显著高于0.55%苏氨酸水平组(P0.05)。0.65%苏氨酸水平组血清中谷丙转氨酶活性显著高于0.55%苏氨酸水平组(P0.05)。0.65%、0.70%和0.75%苏氨酸水平组血清中尿素氮含量显著低于0.55%和0.60%苏氨酸水平组(P0.05)。饲粮中苏氨酸水平对血清中白蛋白、总胆固醇、甘油三酯、尿酸、肌酐含量及碱性磷酸酶、谷草转氨酶活性无显著影响(P0.05)。4)二次曲线分析结果表明,分别以料蛋比和血清尿素氮含量为评价指标,产蛋高峰期临武鸭苏氨酸需要量分别为0.67%和0.69%。由此可见,饲粮中适宜水平的苏氨酸能够提高临武鸭产蛋性能、蛋品质和机体蛋白质利用率。综合这些指标,产蛋高峰期(30~38周龄)临武鸭饲粮中苏氨酸适宜水平为0.67%~0.69%。
[Abstract]:The purpose of this experiment was to study the effects of dietary threonine level on egg laying performance, egg quality and serum biochemical indexes of Linwu ducks at 30 ~ 38 weeks of age, in order to determine the threonine requirement in the peak period of laying of Linwu duck. 200 Linwu ducks with similar body weight, good health and no significant difference in laying rate (P0.05) were randomly divided into 5 groups, 5 replicates in each group and 8 ducks in each replica. The levels of threonine in the diet of each group were 0.55 and 0.600.65, 0.70% and 0.75, respectively. The experimental period was 63 days. The results showed that: 1) the feed to egg ratio of 0.65% threonine group was significantly lower than that of 0.55% threonine level group (P0.05). The dietary threonine level had no significant effect on average daily feed intake, egg laying rate, average egg weight and daily egg production (P0.05) 0.65. The protein height and hardy unit of 0.70% and 0.75% threonine group were significantly higher than that of 0.55% threonine level group (P0.05). The effects of dietary threonine level on egg shape index, egg shell thickness, yolk color, yolk ratio, There was no significant effect on egg shell ratio and protein ratio (P0.05). The serum total protein content in 0.70% threonine group was significantly higher than that in 0.55% threonine group (P0.05). The activity of glutamate-pyruvic transaminase in serum was significantly higher in the group of 0.55% threonine than that in the group of 0.55% threonine (P0.05). The levels of serum urea nitrogen in 0.70% and 0.75% threonine groups were significantly lower than those in 0.55% and 0.60% threonine groups (P0.05). Serum albumin, total cholesterol, triglyceride, uric acid, creatinine content, alkaline phosphatase and glutamic oxaloacetic transaminase activity were not significantly affected by dietary threonine levels (P0.05). The ratio of feed to egg and the content of serum urea nitrogen were used as evaluation indexes, and the threonine requirements of Linwu duck were 0.67% and 0.69% respectively. Therefore, the suitable level of threonine in diet could improve the laying performance, egg quality and protein utilization rate of Linwu duck. Combined with these indexes, the suitable level of threonine in the diet of Linwu duck was 0.67 and 0.69, respectively, in the peak period of laying eggs (30 ~ 38 weeks old).
【作者单位】：湖南省畜牧兽医研究所动物营养与饲养技术研究室;湖南畜禽安全生产协同创新中心;中国农业科学院麻类研究所;
【基金】：国家水禽产业技术体系建设专项资金(CARS-43-39) 中国农业科学院农业科学与技术创新工程专项资金(ASTIP-IBFC02) 湖南畜禽安全生产协同创新中心专项资金(CICAPS)
【分类号】：S834.5

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