This study compared the effect of dietary supplementation with an inorganic or organic zinc source on the gut morphology in the jejunum of broilers. One-day-old chickens were fed a basal diet (Control group: BD — 32 mg Zn.kg−1 DM), or the same BD supplemented with 30 mg or 70 mg of Zn per kg of DM in the form of ZnSO4.H2O (Group 1: 30 mg ZnSO4; Group 2: 70 mg ZnSO4), and 30 mg or 70 mg of Zn per kg of DM in the form of zinc chelate of glycine hydrate (Group 3: 30 mg Zn-Gly; Group 4: 70 mg Zn-Gly) for 40 days. The villus height was increased in the groups which received 30 mg ZnSO4 and 70 mg ZnSO4 and or 70 mg ZnSO4, as compared to the BD and 30 mg Zn-Gly. The villus surface was higher in all groups receiving the Zn supplements in comparison to the BD.
1. Bao, Y. M., Choct, M., Iji, P. A., Bruerton, K., 2010: The digestibility of organic trace minerals along the small intestine in broiler chickens. Asian-Australasian J. Anim. Sci., 23, 90—97.
2. Beyersmann, D., Haase, H., 2001: Functions of zinc in signalling, proliferation and differentiation of mammalian cells. BioMetals, 14, 331—341.
3. Bobíková, K., Levkut, M., Jr., Husáková, E., Levkutová, M., Kissová, V., Ivanišinová, O., et al., 2016: Effect of glycin-zinc complex on mucin and IgA expression, secretory IgA concentration and lengths of intestinal villi in chickens. J. Comp. Pathol., 154, 81.
4. Burrell, A. L., Dozier, W. A., Davis, A. J., Compton, M. M., Feeman, M. E., et al., 2004: Responses of broilers to dietary zinc concentrations and sources in relation to environmental implications. British Poult. Sci., 45, 225—263.
5. Feng, J., Ma, W. Q., Niu, H. H., Wu, X. M., Wang, Y., Feng, J., 2010: Effects of zinc glycine chelate on growth, haematological, and immunological characteristics in broilers. Biol. Trace Elem. Res., 133, 2003—2011.
6. Katouli, M., Melin, L., Jensen-Waern, M., Wallgren, P., Möllby, R., 1999: The effect of zinc oxide supplementation on the stability of the intestinal flora with special reference to composition of coliforms in weaned pigs. J. Appl. Microbiol., 87, 564—573.
7. Levkut, M., Jr., Husáková, E., Bobíková, K., Karaffová, V., Levkutová, M., Ivanišinová, O., et al., 2017: Inorganic or organic zinc and MUC-2, IgA, IL-17, TGF-β4 gene expression and sIgA secretion in broiler chickens. Food Agricult. Immunol., 28, 801—811.
9. National Research Council, 1994:Nutrient Requirements of Poultry. 9th edn., Washington, DC, National Academic Press, 157 pp.
10. Payne, R. L., Bidner, T. D., Fakler, T. M., Southern, L. L., 2006: Growth and intestinal morphology of pigs from sows fed two zinc sources during gestation and lactation. J. Anim. Sci., 84, 2141—2149.
11. Southon, S., Gee, J. M., Bayliss, C. E., Wyatt. G. M., Horn, N., Johnson, I. T., 1986: Intestinal microflora, morphology and enzyme activity in zinc-deficient and Zn-supplemented rats. Br. J. Nutr., 55, 603—611.
12. Sunder, G. S., Panda, A. K., Gopinath, N. C. S., Rama Rao, S. V., Raju, M. V. L. N., Reddy, M. R., et al., 2008: Effects of higher levels of zinc supplementation on performance, mineral availability, and immune competence in broiler chickens. J. Appl. Poult. Res., 17, 79—86.
13. Tang, Z., Wen, C., Li, P., Wang, T., Zhou, Y, 2014: Effect of zinc-bearing zeolite clinoptololite on growth performance, nutrient retention, digestive enzyme activities, and intestinal function of broiler chickens. Biol. Trace Elem. Res., 158, 51—57.
14. Wenqiang, M. A., Niu, H., Feng, J., Wang, Y., Feng, J., 2011: Effect of zinc glycine chelate on oxidative stress, contents of trace elements, and intestinal morphology in broilers. Biol. Trace Elem. Res., 142, 546—556.
15. Yu, Y., Lu, L., Wang, R. L., Xi, L., Luo, X. G., Liu, B., 2010: Effects of source and phytate on zinc absorption by in situ ligated intestinal loops of broilers. Poult. Sci., 89, 1146—1155.