3Ducros V. Chromium metabolism [J]. Biol Trace Elem Res,1992,32:65.
4Burton J L, Mallad B A, Mowat D N. Effect of Supplement chrom on immune response of perparlurient and early latctation dairy cows[J]. J Anita Sci,1993,71: 15-32.
5Moonsie-shageer S,Mowat D N. Effect of lever supplemental chromium on performance,serum constituenls and immune stalus of slressed feeder calves[J]. J Anim Sci,1993,71:232- 238.
6Heuglen E V, Spear J W. Immune response and growth of stressed weanling pigs supplem ented with organic or inorganic forms of chromium[J]. J Anim Sci,1994,7(suppl 1):274.
7Chang X,Mowal D N,Spies G A. Carcass characteristics and lissue-mineral contenls of sleers fed supplemental chromium[J]. Can J Anita Sci,1992,72:663 669.