1Hsu J H,Lo S L. Effect of composting on characterization and leaching of copper,manganese.and zinc from swine manure[J]. Environ Pollut,2001,114( 1 ) ; 119-127.
2Peter Wen-shyg Chiou,Kuo-Lung Chen,Bi Yu. Toxicity, tissue accumulation and residue in egg and excreta of copper in laying hens [J]. Animal Feed Science and Technology,1997,67 ( 1 ) :49-61).
3Mondal M K,Das T K,Biswas P,et al. Influence of dietary inorganic and organic copper salt and level of soybean oil on plasma lipids,metabolites and mineral balance of broiler chickens[J]. Animal Feed Science and Technology,2007,139(3-4) :212-233.
4William W Saylor,Judith V Downer. Copper and zinc distribution in the liver and oviduct of estrogen- and testosteronetreated hens (Gallus domesticus)LJ]. Nutrition Research,1986,6 (2) : 181-190.
5Leeson S,Caston L. Using minimal supplements of trace minerals as a method of reducing trace mineral content of poultry manure [.J]. Animal Feed Science and Technology,2008,142 (3-4) :339-347,.
6Peter Wen-Shyg Chiou,Kuo-Lung Chen,Bi Yu. Effect of dietary organic arsenicals and cupric sulfate on copper toxiciW, liver accumulation and residue in eggs and excreta of laying hens[J]. Animal Feed Science and Technology,1998,73(1-2):161-171.
7Kaya T,Kececi S. Halilolu. Effects of zinc and vitanfin A supplements on plasma levels of thyroid hormones,cholesterol, glucose and egg yolk cholesterol of laying hens [J].Research in Veterinary Science ,2001,71 (2) : 135-139.