饲粮营养限制对断奶湖羊羔羊生长、屠宰性能以及器官发育的影响

doi:doi: 10.11843/j.issn.0366-6964.2016.08.010

Abstract

Abstract:

The aim of this study was to assess the effect of protein and energy restriction on growth and slaughter performance and visceral organ development of weaned Hu lambs.Sixty-four weaned Hu lambs were randomly assigned into 4 groups，including control group (CON)，20% of protein restriction (PR)，20% of energy restriction (ER)，20% of energy and protein restriction (BR).There were 4 replicates in each group，and 4 lambs(2 females，2 males) in each replicate.The intakes of starter were recorded，and all the lambs were weighed on 60 and 120 days of age，then 4 of them from each group were slaughtered on 120 days of age for the determination of organ weight，casrcass weight，lamb GR values and eye muscle area.The results showed as follows：1) No significant difference was observed among PR，ER and CON groups in terms of final weight (120 d)，average daily gain (ADG) and feed conversion rate (FCR) (P>0.05)，whereas final weight in BR group was significantly lower than CON group (P<0.05).2) The dressing percentage in BR was lower than that in CON (P<0.05).Eye muscle area and GR values from PR，ER and BR groups were significantly lower than those from CON group (P<0.05).3) Liver weight and rumen weight from the 3 treatment groups were significantly lower than that from CON group (P<0.05)，and liver weight accounted for the proportion of live weight before slaughter in ER and BR groups were significant lower than that in CON group (P<0.05)，while no significant difference was obtained in terms of rumen weight accounted for the proportion of live weight before slaughter (P>0.05).In conclusion，energy and protein restriction significantly reduced growth and slaughter performance，and energy and(or) protein restriction constrained the development of liver.

CLC Number:

S826
S821.4

QI Min-li，MA Tie-wei，DIAO Qi-yu，CUI Kai，WANG Bo，CHAI Jian-min，WANG Zi-yu，ZHANG Nai-feng. Effect of Protein and Energy Restriction on Growth and Slaughter Performance and Visceral Organs Development of Weaned Hu Lambs[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2016, 47(8): 1601-1609.

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Effect of Protein and Energy Restriction on Growth and Slaughter Performance and Visceral Organs Development of Weaned Hu Lambs

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