摘要
[目的]本文旨在研究胍基乙酸(GAA)对樱桃谷肉鸭生长性能、屠宰性能、抗氧化能力的影响。[方法]选用720只健康且体质量相近的10日龄樱桃谷肉鸭,随机分为4组,每组6个重复,每个重复30只。分别饲喂添加质量分数为0%(对照组)、0.025%(试验组Ⅰ)、0.05%(试验组Ⅱ)、0.10%(试验组Ⅲ)GAA的试验日粮。试验结束时(42日龄),每重复随机抽取1只肉鸭进行屠宰,测定各项指标。[结果]与对照组相比,试验组的平均日增体质量有增高趋势,料重比有降低趋势,但差异均不显著(P>0.05);试验组Ⅱ的半净膛率、全净膛率、腿肌率均显著高于对照组(P<0.05);试验组Ⅱ胸肌中的肌酸含量与试验组Ⅲ血浆中的肌酸含量均显著高于对照组(P<0.05)。血清中,试验组总抗氧化能力(T-AOC)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性均有增加的趋势(P>0.05);丙二醛(MDA)含量均有所降低,其中试验组Ⅱ显著低于对照组(P<0.05);谷胱甘肽过氧化物酶(GSH-Px)活性分别比对照组提高了9.96%、32.46%、12.34%,且试验组Ⅱ显著高于其他3组(P<0.05);试验组Ⅱ的还原型谷胱甘肽(GSH)含量显著高于对照组(P<0.05)。肝脏中,胍基乙酸具有增加T-AOC、CAT、SOD、GSH-Px活性与GSH含量的趋势,其中试验组Ⅱ的SOD活性和GSH含量显著高于其他3组(P<0.05),GSH-Px活性显著高于对照组(P<0.05)。[结论]日粮中添加GAA对提高肉鸭的生长性能无显著影响,但在本试验条件下,添加0.05%的GAA可在一定程度上改善樱桃谷肉鸭的屠宰性能和抗氧化能力。
[Objectives]The aim of the study was to investigate the effects of guanidinoacetic acid(GAA)on growth performance,slaughtering performance,and antioxidant capacity in Cherry Valley ducks.[Methods]A total of 720 healthy 10 day-old Cherry Valley ducks with roughly equal weight were randomly assigned to 4 groups with 6 replicates of 30 ducks in each replicate(pen).Ducks were fed a basal diet supplemented with 0%(control),0.025%(experimentⅠ),0.05%(experimentⅡ)and 0.10%(experimentⅢ)GAA.At42 day-old,1 duck per pen was randomly selected for measuring the relative indexes.[Results]GAA supplementation tended to increase average daily gain(ADG)and decrease feed/gain(F/G)respectively,but it was not significant(P〈0.05).The percentage of half eviscerated yield,eviscerated yield,and leg muscle also tended to be increased,especially in the experimentⅡ(P〈0.05),compared with the control.The creatine content of breast muscle in experimentⅡand the plasma creatine content in experimentⅢwere higher(P〈0.05)than those in control.In serum,total antioxidant capacity(T-AOC),catalase(CAT)and superoxide dismutase(SOD)activity in the three experiment groups were numerically increased(P〈0.05)and malondioldehyde(MDA)content tended to decrease,especially in experimentⅡ(P〈0.05),compared with the control.Compared with the control,glutathione peroxidase(GSH-Px)activity in the three experiment groups were increased respectively by 9.96%,32.46%,12.34%,and the experimentⅡwas significantly higher than other groups(P〈0.05).Reduced glutathione tablets(GSH)content was markedly increased(P〈0.05)in experimentⅡcompared with the control.In liver,the activity of T-AOC,CAT,SOD,GSH-Px and the content of GSH tended to be increased when GAA was supplemented,especially the SOD activity and GSH content in the experimentⅡ,which were higher(P〈0.05)than the other groups,and the GSH-Px activity was higher(P〈0.05)than the control.[Conclusions]The results suggest that diets supplemented with GAA has no significant effect on growth performance of Cherry Valley ducks,but can improve slaughter performance and antioxidant capacity.Under this experiment conditions,the optimum addition content of GAA in diets was 0.05%.
作者
王亚琼
刘强
姜发彬
袁庆启
颜瑞
庄苏
WANG Yaqiong;LIU Qiang;JIANG Fabin;YUAN Qingqi;YAN Rui;ZHUANG Su(College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China)
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2016年第2期269-274,共6页
Journal of Nanjing Agricultural University
关键词
胍基乙酸
肉鸭
生长性能
屠宰性能
抗氧化能力
guanidinoacetic acid(GAA)
ducks
growth performance
slaughtering performance
antioxidant capacity
