研究简报

饲粮中添加包被蛋氨酸对肉鸡生长性能、血液生化指标和养分表观回肠消化率的影响

  • 张勇 ,
  • 韩春晓 ,
  • 朱宇旌 ,
  • 季文彦 ,
  • 邵彩梅
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  • 1. 沈阳农业大学畜牧兽医学院, 沈阳 110866;
    2. 辽宁禾丰牧业股份有限公司, 沈阳 110164

收稿日期: 2011-11-02

  网络出版日期: 2012-03-30

Coated Methionine: Effects on Growth Performance, Blood Biochemical Indices and Nutrient Apparent Ileal Digestibility in Broilers

  • ZHANG Yong ,
  • HAN Chunxiao ,
  • ZHU Yujing ,
  • JI Wenyan ,
  • SHAO Caimei
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  • 1. School of Animal Science and Veterinary, Shenyang Agricultural University, Shenyang 110866, China;
    2. Liaoning Wellhope Agri-Tach Co., Ltd., Shenyang 110164, China

Received date: 2011-11-02

  Online published: 2012-03-30

摘要

本试验旨在研究饲粮中添加不同水平包被蛋氨酸对肉鸡生长性能、血液生化指标和氨基酸表观回肠消化率的影响。选用18日龄科宝500肉鸡3 780只,按试验要求随机分为7组,每组设3个重复,每个重复180只鸡。对照组(A组)饲粮添加0.16%的消旋蛋氨酸(DL-Met),试验组饲粮添加含量为50%的包被蛋氨酸,添加量分别为饲粮的0.32%(B组)、0.29%(C组)、0.26%(D组)、0.22%(E组)、0.19%(F组)、0.16%(G组)。饲喂至42日龄结束。结果表明:B组和C组末重、平均日增重和平均日采食量均显著高于对照组(P<0.05),B组死亡率显著低于对照组(P<0.05),其他组与对照组均差异不显著(P>0.05);各试验组(除G组外)血浆谷胱甘肽过氧化物酶活性均显著高于对照组(P<0.05),B组和C组血浆总超氧化物歧化酶活性均显著高于G组(P<0.05),其他生化指标各组间均差异不显著(P>0.05);各试验组干物质和粗蛋白质表观回肠消化率均与对照组差异不显著(P>0.05),除G组多种氨基酸表观回肠消化率显著低于对照组(P<0.05)外,其他试验组的各种氨基酸表观回肠消化率均与对照组差异不显著(P>0.05)或显著高于对照组(P<0.05)。结果提示,随着包被蛋氨酸添加量的增加,肉鸡生长性能逐渐改善,氨基酸回肠消化率逐渐提高。饲粮添加0.19%包被蛋氨酸(替代对照组60%的蛋氨酸)即可满足肉鸡需要,即采用包被方式后,蛋氨酸最多可节约40%。

本文引用格式

张勇 , 韩春晓 , 朱宇旌 , 季文彦 , 邵彩梅 . 饲粮中添加包被蛋氨酸对肉鸡生长性能、血液生化指标和养分表观回肠消化率的影响[J]. 动物营养学报, 2012 , 24(4) : 739 -746 . DOI: 10.3969/j.issn.1006-267x.2012.04.019

Abstract

This trial was conducted to study the effects of different levels of coated methionine on growth performance, blood biochemical indices and apparent ileal digestibility of amino acids in broilers. A total of 3 780 Cobb 500 broilers aged 18 days were randomly arranged into 7 groups with 3 replicates per group and 180 broilers per replicate. Control group received a basal diet supplemented with 0.16% DL-methionine, trial groups received the basal diets supplemented with 0.32% (B), 0.29% (C), 0.26% (D), 0.22% (E), 0.19% (F) and 0.16% (G) of coated methionine, and broilers were fed to the 42 days of age. The results showed that final weight, average daily gain and average daily feed intake of groups B and C were higher than those of the control group (P<0.05), and the mortality of group B was lower than that of the control group (P<0.05), but there was no significant difference in all above indices between the other groups and the control group (P>0.05). Plasma GSH-Px activity of trial groups (except group G) was higher than that of the control group (P<0.05), and SOD activity of groups B and C were higher than that of group G (P<0.05), but there were no significant differences in other blood biochemical indices among all groups (P>0.05). There were no significant differences in apparent ileal digestibility of dry matter and crude protein between trial groups and the control group (P>0.05), and the apparent ileal digestibility of amino acids of trial groups was increased (P<0.05) or no change expect that the apparent ileal digestibility of many kinds of amino acids of group G was decreased compared with the control group (P<0.05). These results indicate that growth performance and apparent ileal digestibility of amino acids in broilers are increased with the supplementation of coated methionine increasing, but the supplementation of 0.19% coated methionine can meet the needs of broilers, namely, coated methionine can be substituted for 60% DL-methionine in the diet, so DL-methionine can be saved up to 40%.

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