3Mosley S A.Mosley E E.Hatch B.et al Effect of varying levels of fatty acids from pabn oil on feed intake and milk production in holstein cows[J].J Dairy Sci.2007.90:987-993.
5Elliott J P.Drackley J K.Weigel D J.Digestibility and effects of hydrogenated palm fatty acid distillate in lactating dairy cows[J].J Dairy Sci.1996.79:1031-1039.
6Banks W.Clapperton J L.Ferrie ME.etal Effects of feeding fat to dairy cows receiving a fat-deficient basal diet I.Milk yield and composition[J].J Dairy Res..1976.43:213-218.
7Enjalbert F.Nicot M C.Bayourthe C.etal Effects of duodenal infusions of palmitic stearic or oleic acids on milk composition and physical properties of butter[J].J Dairy Sci.2000.83:1428-1433.
8Grummer R R Effects of feed on the composition of milk fat[J].J Dairy Sci.1991.74(9):3244-3257.
9Bauman D E. Griinari J M. Nutritional regulation of milk fat synhesis[J]. Annu Rev Nutr. 2003, 23: 203-227.
10Baumgard L II, Matitashvili E. Corl B A. et al. Trans-10. trans-12 conjugated linoleic acid decreases tipogenic rates and expression of genes involved in milk lipid synthesis[J].J Dairy Sci. 2002, 85:2 155-2 163.
2[8]Butler W R,Everett R W.Coppock C E.The relationships between energy balance,milk production and ovulation postapartum Hostein cows[J].J Anim Sci,1981,53:742-748.
3[9]Butler W R,Smith R D.Interrelationships between energy balance and postpartum reproductive function in dairy cattle[J].J Dairy Sci,1989,72:767-783.
4[10]Staples CR,Thatcher W W,Clark J H.Relationship between ovarian activity and energy status during the early postpartum period of high producing dairy cows[J].J Dairy Sci.1990.73:938-947.
5[11]Lucy M C,Staples C R,Thatcher W W,et al.Influence of diet composition,dry matter intake,milk production and energy balance on time of postpartum ovulation and fertility in dairy cows[J].Anim Prod,1992.54:323-331.
6[12]Thatcher W W,Wilcox C J.Postpartum estrus as an indicator of reproductive status in the dairy cow[J].J Dairy Sci.1973.56:608-610.
