中国畜牧杂志2018，Vol.54Issue(5)：91-96,6.DOI:10.19556/j.0258-7033.2018-05-091
京红商品代蛋鸡预产蛋期(17～20周龄)蛋氨酸需要量研究
Dietary Methionine Requirement of Jinghong Commercial Layers during Pre-laying Period (17～20 wks)
摘要
Abstract
This study was conducted to investigate the dietary methionine (Met) requirement of Jinghong commercial layers during the pre-laying period (17～20 wks).A total of 750 Jinghong commercial layers aged of 17 weeks were randomly divided into 5 groups with 5 replicates per group and 30 hens per replicate.The level of dietary Met in five diets were 0.20％ (control group),0.26％,0.32％,0.38％ and 0.44％ respectively.The feeding trial was lasted for 4 weeks.The results showed that with the increase of dietary Met levels,the final body weight (FBW) of layers aged of 20 weeks and average daily gain (ADG) of birds presented significantly increasing tendency linearly (P＜0.05).The FBW and ADG of laying hens in group of 0.44％ Met were the biggest in the five groups.Dietary Met levels presented significantly increasing tendency on serum free methionine linearly (P＜0.05).MoreoVer,the level of serum free methionine in group of 0.44％ Met was significantly higher than that in groups of 0.20％,0.26％ and 0.32％ Met.There were significant influences of dietary Met on serum uric acid levels of laying hens (P＜0.05),the level of serum uric acid in group of 0.38％ and 0.44％ Met was significantly higher than that in groups of 0.20％ and 0.26％ Met.The layers in group of 0.44％ Met had the highest activity of alkaline phosphatase in the five groups.Integrated growth performance and serum biochemical parameters,the requirement of Met of Jinghong commercial layers is 0.44％ during the pre-laying period (17～20 weeks) in this study.关键词
京红商品代蛋鸡/预产蛋期/蛋氨酸/需要量Key words
Jinghong commercial layers/Pre-laying period/Met requirement分类
农业科技引用本文复制引用
马景林,梁中军,张国强,马秋刚,计成,张建云,赵丽红..京红商品代蛋鸡预产蛋期(17～20周龄)蛋氨酸需要量研究[J].中国畜牧杂志,2018,54(5):91-96,6.基金项目
国家蛋鸡产业技术体系项目(CARS-40-K08) （CARS-40-K08）
