Effects of microbial feed additives on feed utilization and growth performance in growing Barki lambs fed diet based on peanut hay. Issue 5 (11th September 2020)

• Record Type: Journal Article
• Authors: Sallam, Sobhy M. A.; Kholif, Ahmed E.; Amin, Khalid A.; El-Din, Adel N. M. Nour; Attia, Marwa F. A.; Matloup, Osama H.; Anele, Uchenna Y.
• Is Part Of: Animal biotechnology. Volume 31:Issue 5(2020)
• Page Start: 447
• Page End: 454
• Publication Date: 2020-09-11
• Subjects: Blood metabolites -- DFM -- digestibility -- growth performance -- metabolism; Animal biotechnology -- Periodicals; Animals, Domestic -- genetics -- Periodicals; Animals, Genetically Modified -- Periodicals; 660.6
• DOI: 10.1080/10495398.2019.1616554
• Languages: English
• ISSNs: 1049-5398

Abstract

Abstract: The effects of supplementing diet of growing lambs with microbial feed additive mixture (direct-fed microbial; DFM) based on Saccharomyces cerevisiae, lactic acid bacteria and exogenous enzymes on feed intake, nutrient digestibility, nitrogen (N) utilization, ruminal fermentation, blood chemistry and growth performance were studied. The study was a completely randomized design with 12 growing Barki lambs divided into two groups of six lambs per treatment. Lambs were offered a control diet of peanut hay and concentrates (1:1 dry matter (DM) basis) or the control diet supplemented with DFM at 0.5 g/day (Bactozyme treatment) for 16 weeks. There was no effect on feed efficiency but Bactozyme lambs had increased ( p = 0.009) feed intake, average daily gain ( p = 0.042) and final body weight ( p = 0.047). Bactozyme treatment had greater neutral detergent fiber ( p = 0.020) and acid detergent fiber ( p = 0.034) digestibility compared with the control treatment. Metabolism experiment showed that the feed additive mixture increased ( p <0.05) N intake and N retention. Bactozyme treatment had greater blood total protein ( p = 0.027), and globulin ( p = 0.025) concentrations compared with the control treatment. It is concluded that supplementing growing Barki lambs with DFM at 0.5 g daily enhanced final body weight gain and fiber digestion without affecting feed efficiency.