Effect of reduced energy density of close-up diets on metabolites, lipolysis and gluconeogenesis in Holstein cows

  • Huang, Wenming (Department of Animal Science, College of Animal Science, Southwest University) ;
  • Wang, Libin (Department of Animal Science, College of Animal Science, Southwest University) ;
  • Li, Shengli (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University) ;
  • Cao, Zhijun (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
  • Received : 2018.08.21
  • Accepted : 2018.12.20
  • Published : 2019.05.01


Objective: An experiment was conducted to determine the effect of reduced energy density of close-up diets on metabolites, lipolysis and gluconeogenesis in cows during the transition period. Methods: Thirty-nine Holstein dry cows were blocked and assigned randomly to three groups, fed a high energy density diet (HD, 1.62 Mcal of net energy for lactation $[NE_L]/kg$ dry matter [DM]), a medium energy density diet (MD, $1.47Mcal\;NE_L/kg\;DM$), or a low energy density diet (LD, $1.30Mcal\;NE_L/kg\;DM$) prepartum; they were fed the same lactation diet to 28 days in milk (DIM). All the cows were housed in a free-stall barn and fed ad libitum. Results: The reduced energy density diets decreased the blood insulin concentration and increased nonesterified fatty acids (NEFA) concentration in the prepartum period (p<0.05). They also increased the concentrations of glucose, insulin and glucagon, and decreased the concentrations of NEFA and ${\beta}-hydroxybutyrate$ during the first 2 weeks of lactation (p<0.05). The plasma urea nitrogen concentration of both prepartum and postpartum was not affected by dietary energy density (p>0.05). The dietary energy density had no effect on mRNA abundance of insulin receptors, leptin and peroxisome proliferator-activated $receptor-{\gamma}$ in adipose tissue, and phosphoenolpyruvate carboxykinase, carnitine palmitoyltransferase-1 and peroxisome proliferator-activated $receptor-{\alpha}$ in liver during the transition period (p>0.05). The HD cows had higher mRNA abundance of hormone-sensitive lipase at 3 DIM compared with the MD cows and LD cows (p = 0.001). The mRNA abundance of hepatic pyruvate carboxy-kinase at 3 DIM tended to be increased by the reduced energy density of the close-up diets (p = 0.08). Conclusion: The reduced energy density diet prepartum was effective in controlling adipose tissue mobilization and improving the capacity of hepatic gluconeogenesis postpartum.


Transition Cow;Dietary Energy Density;Lipolysis, Gluconeogenesis;Blood Metabolites


Supported by : National Natural Science Foundation of China, Central Universities


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