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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.20.0246    [Accepted] Published online October 14, 2020.
Effect of dietary supplementation with Allium mongolicum Regel extracts on growth performance, carcass characteristics, and the fat color and concentrations of three branched-chain fatty acids related to flavor in ram lambs
Wangjing Liu1  , Changjin Ao1,* 
College of Animal Science and Technology, Gansu Agricultural University, No.1 Yingmen Village Anning, Lanzhou, Gansu 730070, People’s Republic of China
Correspondence:  Changjin Ao, Tel: 13947119088, Fax: 0471-4309214, Email: changjinao@aliyun.com
Received: 21 April 2020   • Revised: 2 July 2020   • Accepted: 21 April 2020
Abstract
Objective
This study aimed to investigate the effect of dietary supplementation with Allium mongolicum Regel extracts on the growth performance, carcass characteristics, fat color, and concentrations of three branched-chain fatty acids related to flavor in ram lambs.
Methods
Sixty 3-month-old, male, small-tailed Han sheep were selected and randomly allocated into four groups in a randomized block design. Four feeding treatments were used: 1) a basal diet without supplementation as the control group (CK); 2) the basal diet supplemented with 10 g∙lamb-1∙d-1 Allium mongolicum Regel powder as the AMR group; 3) the basal diet supplemented with 3.4 g∙lamb-1∙d-1 Allium mongolicum Regel water extract as the AWE group; and 4) the basal diet supplemented with 2.8 g∙lamb-1∙d-1 Allium mongolicum Regel ethanol extract as the AFE group.
Results
The results demonstrated that the dry matter intake was lower for the AFE group than that in other groups (p=0.001). The feed conversion ratio was greater for the AFE than that in other groups (p=0.039). Dietary supplementation with Allium mongolicum Regel powder and its extracts decreased the concentrations of 4-methyloctanoic acid (MOA) (p<0.001), 4-ethyloctanoic acid (EOA) (p<0.001), and 4-methylnonanoic acid (MNA) (p=0.044) in perirenal adipose tissue compared to those observed in the CK lambs. Dietary supplementation with Allium mongolicum Regel powder and its extracts decreased the concentrations of MOA (p<0.001) and EOA (p<0.001) in dorsal subcutaneous adipose tissue compared to those in the CK lambs. The concentrations of MOA (p<0.001) and EOA (p=0.002) in omental adipose tissue were significantly affected by treatment, although there was a tendency for lower MNA (p=0.062) in AMR, AWE, and AFE lambs than that in CK lambs.
Conclusion
This study demonstrated that Allium mongolicum Regel and its extracts could significantly promote feed efficiency, although dry matter intake decreased and could decrease the MOA and EOA concentrations related to characteristic flavor and odor of body fat in lambs, except for tail adipose tissue.
Keywords: Allium mongolicum Regel; Branched-chain Fatty Acids; Carcass Characteristics; Color; Growth Performance


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