5BERTICS S J, GRUMMER R R, CADORNIGA- VALINO C, et al. Effect of prepartum dry matter in- take on liver triglyceride concentration and early lacta- tion [ J ]. Journal of Dairy Science, 1992, 75 ( 7 ) : 1914-1922.
6DANN H M,MORIN D E,BOLLERO G A,et al.Pre- partum intake, postpartum induction of ketosis, and pe- riparturient disorders affect the metabolic status of dairy cows [J]. Journal of Dairy Science, 2005, 88 (9) :3249-3264.
7GONZLEZ F D, MUIlqIO R, PEREIRA V, et al. Re- lationship among blood indicators of lipomobilization and hepatic function during early lactation in high- yielding dairy cows [J]. Journal of Veterinary Sci- ence,2011,12(3) : 251-255.
8HOLTENIUS P.Plasma lipids in normal cows around partus and in cows with metabolic disorders with and without fatty liver[J]. Acta Veterinaria Scandinavica, 1989,30 (4) : 441-445.
9BASOGLU A, SEVINC M, OK M, et al. Peri and postparturient concentrations of lipid lipoprotein insu- lin and glucose in normal dairy cows [ J ]. Turkish Journal of Veterinary & Animal Science, 1998, 22 (2) :141-144.
10DRACKLEY J K. Biology of dairy cows during the transition period: the final frontier? [J]. Journal of Dairy Science, 1999,82( 11 ) :2259-2273.
