饲粮缬氨酸水平对蛋鸡生产性能、蛋品质及血清生化指标的影响  

Dietary Valine Level Affects Performance,Egg Quality and Serum Biochemical Indices in Laying Hens

作　　者：代腊[1] 顾林英 朱巧明 朱莎[1] 张爱婷[1] 邹晓庭[1] 胡彩虹[1] 

机构地区：[1]浙江大学饲料科学研究所动物分子营养学教育部重点实验室,杭州310058 [2]浙江欣欣饲料股份有限公司,嘉兴314005

出　　处：《动物营养学报》2012年第4期654-660,共7页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家蛋鸡产业技术体系建设专项基金资助(nycytx-g16)

摘　　要：本文旨在研究饲粮不同缬氨酸水平对蛋鸡生产性能、蛋品质及血清生化指标的影响,并探讨蛋鸡饲粮中缬氨酸的最适添加量。试验选用720只体重相近的40周龄的海兰褐壳蛋鸡,随机分成5组,每组4个重复,每个重复36只鸡,分别饲喂缬氨酸水平为0.6%、0.7%、0.8%、0.9%、1.0%的饲粮,试验期为56 d。结果表明:1)0.8%水平组料蛋比和1.0%水平组平均日采食量分别最低,与其他各组均差异显著(P<0.05);各组产蛋率、平均蛋重和日产蛋均重均无显著差异(P>0.05)。2)0.8%水平组蛋壳强度最大,1.0%水平组蛋清蛋白质含量最低,与其他各组均差异显著(P<0.05)或有显著的趋势(P<0.10);各组蛋壳厚度、哈夫单位、蛋黄颜色、蛋白高度、蛋黄和蛋清相对重均无显著差异(P>0.05)。3)0.8%水平组血清葡萄糖含量最高,显著高于其他各组(P<0.05);0.8%水平组血清尿素氮和尿酸含量最低,总氨基酸含量最高,与其他各组均有差异显著的趋势(P<0.10)。4)二次曲线分析表明:当饲粮代谢能为11.31 MJ/kg、粗蛋白质水平为15.81%、赖氨酸水平为0.77%时,以料蛋比为评价指标,产蛋高峰期蛋鸡缬氨酸需要量为0.78%,以蛋壳强度和血清白蛋白含量为评价指标,缬氨酸需要量分别为0.81%和0.75%。由此可知,基础饲粮中添加一定量的缬氨酸可降低产蛋高峰期蛋鸡料蛋比,增强蛋壳强度和提高血清葡萄糖含量。This study was conducted to investigate the effects of dietary valine level on the performance,egg quality and serum biochemical indices in laying hens,and to explore the optimal valine level in the diet of laying hens.A total of 720 Hy-Line variety Brown laying hens aged 40 weeks were randomly allocated to 5 groups with 4 replicates per group and 36 hens per replicate.Valine was added to a basal diet to obtain the valine level at 0.6%,0.7%,0.8%,0.9% and 1.0%,respectively,and the experiment lasted for 8 weeks.The results showed as follows: 1) although supplementing the diet with valine did not affect the laying rate,average egg weight and average daily egg weight(P>0.05),the average daily feed intake in 1.0% group and the feed/egg ratio in 0.8% group were significantly lower than those in the other groups(P<0.05);2) supplementing the diet with valine did not affect the eggshell thickness,Haugh unit,yolk color,albumen height,and relative weight of egg white and yolk(P>0.05),but the eggshell strength in 0.8% group was higher and the protein content in egg white in 1.0% group was lower compared with the other groups(P<0.05 or P<0.10);3) serum glucose content in 0.8% group was significantly higher than that in the other groups(P<0.05),and the contents of urea nitrogen and uric acid in serum were higher and serum total amino acid content in 0.8% group was lower compared with the other group(P<0.10);4) based on the feed/egg ratio,the eggshell strength and serum albumen content,the optimal valine levels in diets of laying hens in the laying peak period were 0.78%,0.81% and 0.75%,respectively,when the levels of crude protein,lysine and metabolizable energy were set at 15.81%,0.77% and 11.31 MJ/kg in diets.The results suggest that supplementing the diet with suitable valine level reduces feed/egg ratio,improve eggshell strength and serum glucose content.

关 键 词：蛋鸡 缬氨酸 生产性能 蛋品质 血清生化指标 

分 类 号：S83[农业科学—畜牧学]