2P. Schlegel, Y. Nys,C. Jondreville. Zinc availability and digestive zinc solubility in piglets and broilers fed diets varying in their phytate contents, phytase activity and supplemented Zinc source[J]. Animal,2010,4(2):200-209.
4Peters J C,Mahan D C. Effects of dietary organic and inorganic trace mineral levels on sow reproductive performances and daily mineral intakes over six parities [J].Journal of Animal Science, 2008,86:2247-2260.
5Payne R L,Bidner T D,Fakler T M,et al.Growth and intestinal morphology of pigs from sows fed two zinc sources during gestation and lactation[J].Journal of Animal Science,2006,84:2141-2149.
8C. L. Case, M. S. Carlson. Effect of feeding organic and inorganic sources of additional zinc on growth performance and zinc balance in nursery pigs[J]. Journal of Animal Science. 2002,80:1917-1924.
9Ward J D, Spears L W, Kegley E B.Bioavailability of copper proteinateand copper carbonate relative to copper sulfate in cattle[J]. J. Dairy Sci.,1996,79:127-132.
