5PAYNE R L, LAVERGNE T K, SOUTHERN L L. Effect of inorganic versus organic selenium on hen production and egg selenium concentration [J]. Poultry Science,2005,84(2): 232-237.
6PANDA A K, REDDY M R, RAMA R S V, et al. Production perfnrm-ance, serum/yolk cholesterol and immune competence of white leg-horu layers as influenced dietary supplementation with probiotic [J]. Tropical Animal Health and Production, 2003,35 ( 1 ) : 85-94.
7KOHRL J, BRIGELIUS-FLOHE R, BOCK A. et al. Selenium in biology: Facts and medical perspective [J]. Biological Chemistry. 2000,381 (9/10 ) : 849-864.
8BROWN K M,ARTHUR J R. Selenium selenoproteins health: a review[J]. Public Health Nutrition,2001(26):593-599.
9Arechiga C F,et al.Theriogenology,1998,50:65~76.
10Arechiga C F,et al.Theriogenology,1994,41:1251~1258.