7Bobe G, Young J W, Beitz D C. Invited review: pathology, eti- ology, prevention and treatment of fatty liver in dairy cows[J]. Journal of Dairy Science, 2004(87) : 3015-3124.
8Fenwick M A, Fitzpatrick R, Kenny D A, et al. Interrelation- ships between negative energy balance(NEB) and IGF regulation in liver of lactating dairy cows[J]. Domestic Animal Endocinolo- gy, 2008(34): 31-44.
9Golf J P. Major advances in our understanding of nutritional in- fluences on bovine health[J]. Dairy Sci, 2006, 89 : 1292- 1301.
10Holtenius P, Holtenius K. New aspect s of ketone bodies in en- ergy metabolism of dairy cows: a review[J]. Vet Med A Physiol Pathol Clin Med, 1996, 43: 579-587.