3Grandhi R R, Strain J H. Effect of biotin supplementation on reproductive performance and foot lesions in swine [J]. Can J Anim Sci, 1980, 60:961-969.
4Moser R L,Pettigrew J E,Cornelius S G,et al. Feed and energy comsumption by lactating sows as affected by supplemental dietary fat [A]. In:Minn Swine Res[M]. St Paul: University of Minnesota Press,1985.
5Shurson G C,Hogberg M G, DeFever N,et al. Effects of adding fat to the sow lactation diet on lactation and breeding performance[J]. J Anim Sci,1986, 62:672-680.
3Shurson G C,Hogberg M G,DeFever N,et al .Effects of adding fat to the sow lactation diet on lactation and breeding performance [J].J Anim Sci, 1986,62 : 672-680.
4Mahan D C,Fetter A W. J Anim Sci [J], 1982b, 54 : 285-291.
5Grandhi R R,Strain J H. Effect of biotin supplementation on reproductive performance and foot lesions in swine [J]. Can J Anim Sci, 1980,60: 961-969.
6Shurson G C, Hogberg M G, DeFever N, et al . Effects of adding fat to the sow lactation diet on lactation and breeding performance [ J]. J Anita Sci, 1986,62:672 - 680.
7Grandhi R R, Strain J H. Effect of biotin supplementation on reproductive performance and foot lesions in swine[J]. Can J Anita Sci, 1980,60:961 -969.
8Shurson G C, Hogberg M G, DeFever N, et at. Effects of adding fat to the sow lactation diet on lactation and breeding performance[J]. J Anlm Sci, 1986, 62:672 - 680.