7Ariza - Nieto C, Baidoo S K, Walker R D. Dietary supplementation of oregano essential oils (OEO) on the performance of nursery pigs[ J]. Anim Sci ,2006,84( Suppl. 1 ) : 18.
8Marcincak S, Cabadaj R, Popelka P, et al. Antioxidative effect of oregano supplemented to broilers on oxidatve stability of poultry meet [J]. Slov Vet Res,2008,45(2) : 61 -66.
9Lee K W, Everts H, Beynen A C. Essential oils in broiler nutrition [J]. lnt J Pouh Sci,200d-,3(12) : 738 -752.
10Lindemann M D, Cornelius S G, el Kandelgy S M, et al. Effect of age,weaning and diet on digestive enzyme levels in the piglet[J]. J Anim Sci, 1986,62 (5): 1298 - 1307.
