Comparative effects of direct-fed microbials alone or with a trace minerals supplements on the productive performance, blood metabolites, and antioxidant status in grazing Awassi lambs.
Twenty Awassi lambs were used to find the effects of direct-fed microbials (DFM) and long-acting trace minerals rumen bolus (TMB) supplements on performance, blood biochemical variables, and antioxidant status of the lambs under grazing conditions. The lambs were randomly distributed into four groups as follows: (1) untreated, (2) oral dose of 5 mL DFM, (3) TMB, or (4) oral dose of 5 mL DFM and TMB. The treatments were carried out for 90 days. Supplementation with TMB significantly increased (P < 0.05) average daily gain (ADG) and feed efficiency compared with the control. A significant (P < 0.05) increase in blood albumin in the DFM and a significant (P < 0.05) decrease in aspartate aminotrasferase were found in the lambs supplemented with TMB alone or in combination with DFM. Supplementing lambs with TMB resulted in higher glutathione peroxidase, total antioxidant capacity (P < 0.001) and activity of superoxide dismutase (P < 0.05) compared with no supplementation and supplementation with DFM only. In conclusion, TMB supplementation had a positive impact on performance traits and the antioxidant system of the lambs under grazing condition.
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia. ialhidary@ksu.edu.sa.
I A
IA
Alhidary
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.
M M
MM
Abdelrahman
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.|Department of Animal Health, Faculty of Animal Husbandary and Veterinary Sciences, The University of Agriculture, Peshawar, Pakistan.
R U
RU
Khan
D000821:Animal Feed; D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D019587:Dietary Supplements; D019936:Probiotics; D011897:Random Allocation; D012417:Rumen; D012756:Sheep / Q000097:blood / Q000254:growth & development*; D014131:Trace Elements / Q000008:administration & dosage*
D000975:Antioxidants; D014131:Trace Elements
Antioxidant status; Awassi Lamb; Direct-fed microbial; Metabolic profile; Trace minerals
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