Effect of Dietary Cation-Anion Difference during Prepartum and Postpartum Periods on Performance, Blood and Urine Minerals Status of Holstein Dairy Cow

  • Razzaghi, A. (Department of Animal Science, Ferdowsi University of Mashhad) ;
  • Aliarabi, H. (Department of Animal science, Bu-Ali Sina University) ;
  • Tabatabaei, M.M. (Department of Animal science, Bu-Ali Sina University) ;
  • Saki, A.A. (Department of Animal science, Bu-Ali Sina University) ;
  • Valizadeh, R. (Department of Animal Science, Ferdowsi University of Mashhad) ;
  • Zamani, P. (Department of Animal science, Bu-Ali Sina University)
  • Received : 2011.09.12
  • Accepted : 2011.11.14
  • Published : 2012.04.01


Twenty four periparturient cows were used to determine the effects of DCAD on acid-base balance, plasma and urine mineral concentrations, health status, and subsequent lactation performance. Each group of 12 cows received either a diet containing -100 DCAD or +100 DCAD for 21 d prepartum. Both anionic and cationic groups were divided into two groups, one received a +200 DCAD and the other +400 DCAD diet for 60 d postpartum. Prepartum reduction of DCAD decreased DMI, urinary and blood pH, urinary concentrations of Na or K and increased plasma and urinary Ca, Mg, Cl and S. Also cows fed -100 DCAD diet consumed the most dry matter in the first 60 d after calving. Postpartum +400 DCAD increased milk fat and total solid percentages, urinary and blood pH and urinary Na and K concentrations, but urinary Ca, P, Cl and S contents decreased. Greater DMI, FCM yields were observed in cows fed a diet of +400 DCAD than +200 DCAD. No case of milk fever occurred for any diets but feeding with a negative DCAD diet reduced placenta expulsion time. In conclusion, feeding negative DCAD in late gestation period and high DCAD in early lactation improves performance and productivity of dairy cows.


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