动物营养学报2016，Vol.28Issue(3)：712-719,8.DOI:10.3969/j.issn.1006-267x.2016.03.011
25～48周龄海兰褐蛋鸡蛋氨酸供给量研究
Methionine Allowance for Hy-Line Brown Laying Hens Aged from 25 to 48 Weeks
摘要
Abstract
The experiment was conducted to evaluate the allowance of methionine ( Met) for Hy-Line Brown laying hens from 25 to 48 weeks of age.Seven hundred and twenty Hy-Line Brown laying hens aged at 24 weeks were randomly divided into 6 groups with 6 replicates containing 20 hens each.The Met content of con-trol group without adding DL-Met was 0.25%, and Met levels for DL-Met addition groups were 0.31%, 0.35%, 0.39%, 0.43%and 0.47%, respectively.The experiment lasted for 24 weeks.The result showed as follows:1) The increase of Met levels significantly increased egg-laying rate and daily egg production ( P<0.05), decreased the ratio of feed to egg (P<0.05), and 0.35%and 0.39%Met supplemental groups got the better effects.The average daily feed intake and average egg weight were also improved but not significantly different ( P>0.05) .2) According to quadratic curve estimation of egg-laying rate, daily egg production, the ratio of feed to egg and average egg weight, the optimal Met allowance for laying hens was 0.36% and 0.38%, during the trial period from 1 to 8 weeks and from 9 to 24 weeks respectively.3) Dietary Met level did not affect plasma total protein ( TP ) content ( P>0.05 ) , but significantly increased plasma albumin ( ALB) content when Met at 0.31%, 0.39%or 0.43%level at the end of the fourth week compared with the control group ( P<0.05) .Dietary Met level did not significantly influence the plasma TP, ALB and urine acid (UA) contents at the end of the eighth week (P>0.05).Dietary Met level did not significantly influence the plasma TP and UA contents at the end of the twenty fourth week ( P<0.05) .Therefore, these overall results suggest that the allowance of Met for Hi-Line Brown laying hens aged from 25 to 32 weeks and from 33 to 48 weeks may be recommended at 0.36% and 0.38%, respectively.关键词
DL-蛋氨酸/蛋鸡/生产性能/血液生化Key words
DL-Met/laying hens/performance/blood biochemistry分类
农业科技引用本文复制引用
郭丹,岳洪源,张海军,王晶,许丽,武书庚,陈正玲,吴传隆..25～48周龄海兰褐蛋鸡蛋氨酸供给量研究[J].动物营养学报,2016,28(3):712-719,8.基金项目
现代农业产业技术体系（ CARS-41-K13）；家禽产业技术体系北京市创新团队 （）
