动物营养学报 >

2020 , Vol. 32 >Issue 9: 4449 - 4455

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.09.056

研究简报 SHORT COMMUNICATION

3~8周龄攸县麻鸭苏氨酸需要量

  • 黄璇 ,
  • 姚亚铃 ,
  • 李闯 ,
  • 张旭 ,
  • 蒋桂韬 ,
  • 胡艳 ,
  • 戴求仲
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  • 1. 湖南省畜牧兽医研究所, 动物营养与饲养技术研究室, 长沙 410131;
    2. 湖南家禽安全生产工程技术研究中心, 长沙 410128;
    3. 怀化市畜牧水产事务中心, 怀化 418000
黄璇(1986-),女,湖南浏阳人,助理研究员,硕士,从事家禽营养与饲料科学研究。E-mail:409097385@qq.com

收稿日期: 2020-03-19

  网络出版日期: 2020-09-17

基金资助

现代农业产业技术体系建设专项资金（CARS-42-21）；湖南省重点研发计划（2017NK2163）；湖南家禽安全生产工程技术中心专项资金（CICAPS）

收起

Requirement of Threonine for Youxian Partridge Ducks Aged from 3 to 8 Weeks

  • HUANG Xuan ,
  • YAO Yaling ,
  • LI Chuang ,
  • ZHANG Xu ,
  • JIANG Guitao ,
  • HU Yan ,
  • DAI Qiuzhong
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  • 1. Animal Nutrition and Feeding Technology Research Lab, Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
    2. Hunan Engineering Research Center of Poultry Production Safety, Changsha 410128, China;
    3. Huaihua Animal Husbandry and Aquatic Transaction Center, Huaihua 418000, China

Received date: 2020-03-19

  Online published: 2020-09-17

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摘要

本试验旨在研究饲粮苏氨酸水平对3~8周龄攸县麻鸭生长性能、免疫器官指数、血清生化和抗氧化指标的影响，以确定3~8周龄攸县麻鸭的苏氨酸需要量。选择300只15日龄、体重相近的攸县麻鸭，随机分成5组，每组6个重复，每个重复10只。各组（Ⅰ~Ⅴ组）饲粮苏氨酸水平分别为0.54%、0.60%、0.66%、0.72%和0.78%。试验期42 d。结果显示：1）Ⅱ、Ⅲ和Ⅳ组的末重和平均日增重均显著高于Ⅰ组（P<0.05）；Ⅰ组料重比最高，且显著高于其他各组（P<0.05）。2）各组之间法氏囊指数、脾脏指数和胸腺指数均无显著差异（P>0.05）。3）Ⅲ和Ⅳ组的血清球蛋白含量显著高于Ⅰ组（P<0.05）。Ⅳ组的血清尿酸含量最低，且显著低于Ⅰ和Ⅱ组（P<0.05）。4）Ⅲ和Ⅳ组的血清丙二醛含量显著低于Ⅰ组（P<0.05），Ⅲ、Ⅳ和Ⅴ组血清总抗氧化能力显著高于Ⅰ组（P<0.05）。5）以末重、平均日增重、料蛋比和血清丙二醛含量为判别指标，通过二次曲线模型估测得出饲粮适宜苏氨酸水平分别为0.68%、0.69%、0.69%和0.71%。由此可见，饲粮苏氨酸水平为0.60%时即可满足3~8周龄攸县麻鸭生长发育需要，但饲粮苏氨酸水平为0.68%~0.71%时可获得较佳的生长性能、血清生化指标和抗氧化能力。因此，在本试验条件下，3~8周龄攸县麻鸭饲粮适宜苏氨酸水平为0.68%~0.71%。

关键词： 苏氨酸; 攸县麻鸭; 免疫机能; 抗氧化指标

本文引用格式

黄璇 , 姚亚铃 , 李闯 , 张旭 , 蒋桂韬 , 胡艳 , 戴求仲 . 3~8周龄攸县麻鸭苏氨酸需要量[J]. 动物营养学报, 2020 , 32(9) : 4449 -4455 . DOI: 10.3969/j.issn.1006-267x.2020.09.056

Abstract

This experiment was conducted to study the effects of dietary threonine (Thr) level on growth performances, immune organ indexes, serum biochemical and antioxidant indices of Youxian partridge ducks aged from 3 to 8 weeks, so as to determine the threonine requirement of Youxian partridge ducks aged from 3 to 8 weeks. Three hundred 15-day-old Youxian partridge ducks with similar body weight were randomly divided into 5 groups with 6 replicates in each group and 10 ducks in each replicate. The dietary threonine levels of five groups (groups Ⅰ to Ⅴ) were 0.54%, 0.60%, 0.66%, 0.72% and 0.78%, respectively The experimental lasted for 42 days. The results showed as followed:1) the final weight and average daily gain of groups Ⅱ, Ⅲ and Ⅳ were significantly higher than those of groupⅠ (P<0.05); the feed to gain ratio of group Ⅰ was the highest, and significantly higher than that of other groups (P<0.05). 2) There were no significant differences in bursa of Fabricius index, spleen index and thymus index among all groups (P>0.05). 3) The serum globulin content of groups Ⅲ and Ⅳ was significantly higher than that of group Ⅰ (P<0.05). The of serum uric acid content of group Ⅳ was the lowest, and significantly lower than that of groups Ⅰ and Ⅱ (P<0.05). 4) The serum malondialdehyde content of groups Ⅲ and Ⅳ was significantly lower than that of group Ⅰ (P<0.05), and the serum total antioxidant capacity of groups Ⅲ, Ⅳ and Ⅴ was significantly higher than that of group Ⅰ (P<0.05). 5) The optimal level of threonine in diets was 0.68%, 0.69%, 0.69% and 0.71% based on final weight, average daily gain, feed to gain ratio and serum malondialdehyde content by quadratic regression, respectively. In conclusion, the dietary threonine level of 0.60% can meet the growth and development requirement of Youxian partridge ducks aged from 3 to 8 weeks, but dietary threonine level of 0.68% to 0.71% can obtain better growth performances, serum biochemical indices and antioxidant capacity. Therefore, in this experiments the dietary suitable threonine level of Youxian partridge ducks aged from 3 to 8 weeks is 0.68% to 0.71%.

Key words： threonine; Youxian partridge ducks; immune function; antioxidant indices

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