| 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 |
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| 引用本文： | 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(4):739-746. |
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| 作者姓名： | 张 勇 韩春晓 朱宇旌 季文彦 邵彩梅 |
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| 作者单位： | 沈阳农业大学畜牧兽医学院，沈阳 １１０８６６;辽宁禾丰牧业股份有限公司，沈阳 １１０１６４ |
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| 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 ３７８０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％。
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| 关 键 词： | 包被蛋氨酸 肉鸡 生长性能 血液生化指标 养分表观回肠消化率 |
Coated Methionine:Effects on Growth Performance,Blood Biochemical Indices and Nutrient Apparent Ileal Digestibility in Broilers |
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| ZHANG Yong,HAN Chunxiao,ZHU Yujing,JI Wenyan,SHAO Caimei.Coated Methionine:Effects on Growth Performance,Blood Biochemical Indices and Nutrient Apparent Ileal Digestibility in Broilers[J].Acta Zoonutrimenta Sinica,2012(4):739-746. |
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| Authors: | ZHANG Yong HAN Chunxiao ZHU Yujing JI Wenyan SHAO Caimei |
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| Institution: | 1.School of Animal Science and Veterinary,Shenyang Agricultural University,Shenyang 110866,China; 2.Liaoning Wellhope Agri-Tach Co.,Ltd.,Shenyang 110164,China) |
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| 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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| Keywords: | coated methionine broilers growth performance blood biochemical indices nutrient apparent ileal digestibility |
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