作 者：
解彪;张乃锋;崔凯;王世琴;吕小康;张春香;刁其玉
单 位：
山西农业大学动物科技学院;中国农业科学院饲料研究所农业部饲料生物技术重点开放实验室
关键词：
中性洗涤纤维;早期断奶羔羊;生长性能;屠宰性能;代谢印记
摘 要：
本试验旨在研究早期断奶羔羊饲喂不同中性洗涤纤维(NDF)水平饲粮对羔羊育肥期生长性能、血清学指标和屠宰性能的影响。选用100只体况良好、体重(6.10±0.10)kg、(18±2)日龄的湖羊公羔,随机分为4组,每组5个重复,每个重复5只羔羊。试验配制NDF水平分别为10%(10N组,作为对照组)、15%(15N组)、20%(20N组)、25%(25N组)的4种饲粮。在21~90日龄阶段,各组羔羊饲喂不同NDF水平的饲粮;在91~150日龄,所有羔羊饲喂同一全混合日粮(TMR),饲粮NDF水平为30%。150日龄时,每组挑选与平均体重相近的6只羔羊,测定血清学指标、屠宰性能和组织器官发育指标。结果表明:1)在90日龄时,15N组、20N组和25N组体重均显著高于10N组(P<0.05);在120日龄时,20N组和25N组体重均显著高于10N组(P<0.05);在150日龄时,20N组和25N组体重较10N组有增加的趋势(P=0.079)。90~120日龄阶段,20N组和25N组羔羊平均日增重显著高于10N组和15N组(P<0.05),20N组羔羊平均干物质采食量显著高于10N组(P<0.05);然而,在120~150日龄阶段,20N组和25N组羔羊平均日增重显著低于10N组和15N组(P<0.05)。在90~150日龄阶段,羔羊平均日增重、平均干物质采食量及料重比各组间无显著差异(P>0.05)。2)20N组血清总蛋白含量显著高于10N组(P<0.05),20N组和25N组血清白蛋白含量显著高于10N组(P<0.05),25N组血清β-羟丁酸含量显著高于10N组和15N组(P<0.05)。3)20N组和25N组羔羊胴体重较10N组有增加趋势(P=0.061)。4)10N组头占宰前活重的比例显著高于20N组(P<0.05),其余指标各组间差异不显著(P>0.05)。综合得出,早期断奶羔羊饲喂NDF水平不低于15%的饲粮能够提高育肥期羔羊的生长性能。
译 名：
Effects of Feeding Different Neutral Detergent Fiber Level Diets for Early Weaned Lambs on Growth Performance,Serological Parameters and Slaughter Performance of Lambs at Fattening Stage
作 者：
XIE Biao;ZHANG Naifeng;CUI Kai;WANG Shiqin;LYU Xiaokang;ZHANG Chunxiang;DIAO Qiyu;College of Animal Science and Technology,Shanxi Agricultural University;Key Laboratory of Feed Biotechnology of the Ministry of Agriculture,Feed Research Institute of Chinese Academy of Agricultural Sciences;
关键词：
neutral detergent fiber;;early weaned lambs;;growth performance;;slaughter performance;;metabolic imprinting
摘 要：
This experiment was conducted to study the effects of feeding different neutral detergent fiber( NDF) level diets for early weaned lambs on growth performance,serological parameters and slaughter performance of lambs at fattening stage. One hundred healthy Hu lambs with body weight of( 6.10±0.10) kg and( 18±2) days of age were randomly divided into four groups with five replicates in each group and five lambs per replicate. Four diets were formulated,which contained 10%( 10 N group,as control group),15%( 15 N group),20%( 20 N group) and 25%( 25 N group) NDF,respectively. At 21 to 90 days of age,lamps in four groups were fed different NDF level diets; at 91 to 150 days of age,all lambs were fed the same total mixed ration. Six lambs in each group were selected to determine serological parameters,slaughter performance and organ development indices at 150 days of age. The results showed as follows: 1) at 90 days of age,body weight in 15 N,20 N and 25 N groups was significantly higher than that in 10 N group( P<0.05); at 120 days of age,body weight in 20 N and 25 N groups was significantly higher than that in 10 N group( P< 0.05); at150 days of age,body weight in 20 N and 25 N groups had an increasing trend compared with 10 N group( P =0.079). Average daily gain in 20 N and 25 N groups was significantly higher than that in 10 N and 15 N groups during 90 to 120 days of age( P<0.05),while it was significantly lower in 20 N and 25 N groups than that in10 N and 15 N groups during 120 to 150 days of age( P<0.05). Average dry matter intake in 20 N group was significantly higher than that in 10 N group during 90 to 120 days of age( P<0.05). No significant differences were found in average daily gain,average dry matter intake and feed to gain ratio during 90 to 150 days of age among all groups( P>0.05). 2) Serum total protein( TP) content in 20 N group was significantly higher than that in 10 N group( P<0.05),serum albumin( ALB) content in 20 N and 25 N groups was significantly higher than that in 10 N group( P<0.05),and serum β-hydroxybutyrate( BHBA) content in 25 N group was significantly higher than that in 10 N and 15 N groups( P<0.05). 3) Carcass weight in 20 N and 25 N groups had an increasing trend compared with 10 N group( P = 0.061). 4) Proportion of head to live weight before slaughter was significantly higher for lambs in 10 N group than that in 20 N group( P<0.05),and no significant differences were found in other parameters( P> 0.05). In conclusion,the diets of early weaned lambs containing more than 15% NDF can promote the growth performance of lambs at fattening stage.
