Effect of organic zinc supplementation on growth, nutrient utilization, and plasma zinc status in lambs
Two experiments were conducted to investigate the effect of supplemental zinc (Zn) on performance, nutrient digestibility, and plasma Zn status in Zandi lambs. In experiment 1, 18 male lambs (BW = 21.30 ± 0.55 kg) were fed a basal diet containing 22.8 mg Zn/kg dry matter (DM) with no supplemental Zn (control) or 20 mg of supplemental Zn/kg of DM from Zn sulfate (ZnS) or Zn peptide (ZnP). Average daily gain and dry matter intake were higher for the lambs fed the diet supplemented with ZnP. Feed conversion ratio was significantly (P < 0.05) lower in the ZnP group compared to the control and ZnS groups. In experiment 2, an in vitro gas production technique was used to evaluate the effects of zinc source on the gas production parameters. Rate of gas production after 6 h and total production of gas after 24 and 48 h did not differ between groups. In vitro DM digestibility, short-chain fatty acids, and ME content were increased (P < 0.05) by ZnP supplementation when compared to the ZnS and control groups. The results of this study showed that feeding ZnP improves performance and digestibility of DM and could result in higher metabolizable energy and short-chain fatty acid yield.
Effect of organic zinc supplementation on growth, nutrient utilization, and plasma zinc status in lambs
Two experiments were conducted to investigate the effect of supplemental zinc (Zn) on performance, nutrient digestibility, and plasma Zn status in Zandi lambs. In experiment 1, 18 male lambs (BW = 21.30 ± 0.55 kg) were fed a basal diet containing 22.8 mg Zn/kg dry matter (DM) with no supplemental Zn (control) or 20 mg of supplemental Zn/kg of DM from Zn sulfate (ZnS) or Zn peptide (ZnP). Average daily gain and dry matter intake were higher for the lambs fed the diet supplemented with ZnP. Feed conversion ratio was significantly (P < 0.05) lower in the ZnP group compared to the control and ZnS groups. In experiment 2, an in vitro gas production technique was used to evaluate the effects of zinc source on the gas production parameters. Rate of gas production after 6 h and total production of gas after 24 and 48 h did not differ between groups. In vitro DM digestibility, short-chain fatty acids, and ME content were increased (P < 0.05) by ZnP supplementation when compared to the ZnS and control groups. The results of this study showed that feeding ZnP improves performance and digestibility of DM and could result in higher metabolizable energy and short-chain fatty acid yield.
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- Eryavuz A, Burk AD. Effects of supplemental zinc concentration on cellulose digestion and cellulolytic and total bacterial numbers in vitro. Anim Feed Sci Technol 2009; 151: 175–183.
- Kessler J, Morel I, Dufey FA, Gutzwiller A, Stern A, Geyes H. Effect of organic zinc sources on performance, zinc status, and carcass, meat, and claw quality in fattening bulls. Livest Prod Sci 2003; 81: 161–171.
- Ryan JP, Kearns P, Quinn T. Bioavailability of dietary copper and zinc in adult Texel sheep: a comparative study of the effects of sulfate and bioplex supplementation. Irish Vet J 2002; 55: 221–224.
- Garg AK, Mudgal V, Dass RS. Effect of organic zinc supplementation on growth, nutrient utilization and mineral profile in lambs. Anim Feed Sci Technol 2008; 144: 82–96.
- Salama AAK, Caja G, Albanell E, Such X, Caslas R, Plaixats. Effects of dietary supplements of zinc-methionine on milk production, udder health and zinc metabolism in dairy goats. J Dairy Res 2003; 70: 9–17.
- Mandal GP, Dass RS, Isore DP, Garg AK, Ram GC. Effect of zinc supplementation from two sources on growth, nutrient utilization and immune response in male crossbred cattle (Bos indicus × Bos taurus) bulls. Anim Feed Sci Technol 2007; 138: 1–12.
- Van Keulen J, Young BA. Evaluation of acid-insoluble ash as a natural marker in ruminant digestibility studies. J Anim Sci 1977; 44: 282–287.
- Menke KH, Raab L, Salewski A, Stingass H, Fritz D, Schneide W. The estimation of the digestibility and metabolizable energy content of ruminant feedstuffs from the gas production when they are incubated with rumen liquor in vitro. J Agr Sci 1979; 93: 217–222.
- France J, Dijkstra J, Dhanoa MS, López S, Bannink A. Estimating the extent of degradation of ruminants feeds from a description of their gas production profiles observed in vitro: derivation of models and other mathematical considerations. Brit J Nutr 2000; 83: 143–150.
- Vázquez-Armijo JF, Martínez-Tinajero JJ, López D, Salem AZM, Rojo R. In vitro gas production and dry matter degradability of diets consumed by goats with or without copper and zinc supplementation. Biol Trace Elem Res 2011; 144: 580–587.
- Menke KH, Steingass H. Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid. Anim Res Dev 1988; 28: 7–25.
- Makkar HPS. In vitro gas methods for evaluation of feeds containing phytochemicals. Anim Feed Sci Technol 2005; 123: 291–302.
- SAS Institute. User’s Guide. Version 9.1: Statistics. Cary, NC, USA: SAS Institute; 2004.
- Droke EA, Gengelbach GP, Spears JW. Influence of level and source (inorganic vs organic) of zinc supplementation on immune function in growing lambs. Asian Austral J Anim Sci 1998; 11: 139–144.
- Fadayifar A, Aliarabi H, Tabatabaei MM, Bahari A, Malecki M, Dezfoulian AH. Improvement in lamb performance on barley based diet supplemented with zinc. Livestock Sci 2012; 144: 285–289.
- Dey A, Garg AK. Effect of supplementation of zinc methionine complex on growth rate and feed efficiency in weaned rats. Indian Vet Med J 2004; 28: 117–120.
- Wright CL, Spears JW. Effect of zinc source and dietary level on zinc metabolism in Holstein calves. J Dairy Sci 2004; 87: 1085–1091.
- Shinde P, Dass RS, Garg AK, Chaturvedi VK, Kumar R. Effect of zinc supplementation from different sources on growth, nutrient digestibility, blood metabolic profile and immune response of male guinea pigs. Biol Trace Elem Res 2006; 112: 247–262.
- Spears JW, Harvey RW, Brown TT. Effects of zinc methionine and zinc oxide on performance, blood characteristics, and antibody titer response to viral vaccination in stressed feeder calves. J Am Vet Med Assoc 1991; 199: 1731–1733.
- Daghash HA, Mousa SM. Zinc sulfate supplementation to ruminant rations and its effects on digestibility in lamb; growth, rectal temperature and some blood constituents in buffalo calves under heat stress. Assiut Vet Med J 1999; 40: 128–146.
- Sobhanirad S, Valizadeh R, Aghel H. Effect of organic and inorganic zinc supplements on degradability of wheat straw and alfalfa hay by using gas production techniques. In: Proceedings of the 13th Animal Science Congress of the Asian-Australian Association of Animal Production Societies; 2008. pp. 24–26.
- Arelovich HM, Owens FN, Horn GW, Vizcarra JA. Effects of supplemental zinc and manganese on ruminal fermentation, forage intake, and digestion by cattle fed prairie hay and urea. J Anim Sci 2000; 78: 2972–2979.