动物营养学报2016，Vol.28Issue(11)：3669-3678,10.DOI:10.3969/j.issn.1006-267x.2016.11.037
蛋氨酸限制与补偿对羔羊生长性能及内脏器官发育的影响
Effects of Dietary Methionine Restriction and Compensation on Growth Performance and Visceral Organ Development of Lambs
摘要
Abstract
The aim of this study was to assess the effects of dietary methionine ( Met) restriction and compen⁃sation on growth performance and visceral organ development of lambs. Twelve pairs of male Hu twin lambs weaned at one week of age were selected and divided into two groups with a matched⁃pairs design. During 2 to 8 weeks of age, lambs were fed diets containing either sufficient [ basal milk replacer+0.70% Met and basal starter+0.40% Met, control ( CON) group] or deficient Met [ basal milk replacer and basal starter, restriction ( RES) group] . During 9 to 12 weeks of age, all lambs were fed diets containing sufficient Met ( basal starter+ 0.40% Met) . Six twins each time were slaughtered at the end of 8 and 12 weeks of age for weighting viscer⁃al organs, respectively. The results showed as follows:1) body weight of 8⁃week⁃old lambs in RES group was significantly lower than that in CON group ( P<0.05);average daily gain in RES group was significantly lower than that in CON group during 2 to 8 weeks of age (P<0.01), whereas feed to gain ratio was significantly higher ( P<0.05); no significant differences were found in average daily gain and feed to gain ratio between two groups during 9 to 12 weeks of age ( P>0. 05 ) . 2 ) Live body weight before slaughter, empty body weight, carcass weight of 8⁃week⁃old lambs in RES group were significantly lower than those in CON group ( P<0.05) , but no significant difference was found in dressing percentage between two groups ( P>0.05);no significant differences were observed in live body weight before slaughter, empty body weight, carcass weight, and dressing percentage between groups at 12 weeks of age ( P>0.05) . 3) No significant differences were ob⁃served in weights and percentages of live body weight before slaughter of visceral organs between groups at 8 and 12 weeks of age (P>0.05). 4) No significant differences were observed in gastrointestinal tract indexes between groups at 8 and 12 weeks of age ( P>0.05) except rumen weight at 8 weeks of age, which was signif⁃icantly lower in RES group than in CON group (P<0.05). In conclusion, dietary restriction of Met level re⁃sults in decreased rumen weight, growth performance and slaughter performance of lambs, but subsequent re⁃coveries of growth performance and visceral organ development appear after the compensation of dietary Met level.关键词
羔羊/蛋氨酸限制/蛋氨酸补偿/生长性能/内脏器官发育Key words
lamb/methionine restriction/methionine compensation/growth performance/visceral organ de-velopment分类
农业科技引用本文复制引用
王杰,崔凯,毕研亮,柴建民,祁敏丽,张帆,王世琴,刁其玉,张乃锋..蛋氨酸限制与补偿对羔羊生长性能及内脏器官发育的影响[J].动物营养学报,2016,28(11):3669-3678,10.基金项目
国家公益性行业（农业）科研专项（201303143）；国家肉羊产业技术体系建设专项 （）
