Enhancing lactational performance of Holstein dairy cows under commercial production: malic acid as an option

Hani M. El-Zaiat, Ahmed E. Kholif*, Dyaaeldin A. Mohamed, Osama H. Matloup, Uchenna Y. Anele, Sobhy M.A. Sallam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


BACKGROUND: In Experiment 1 we studied the effect of malic acid addition at 0, 1, 2 and 3 mg g−1 dry matter (DM) feed on in vitro ruminal fermentation. In Experiment 2, the effect of supplementing malic acid on feed intake, digestion and milk production and composition of lactating cows was studied. 200 multiparous lactating Holstein dairy cows were randomly assigned to two treatments: a basal diet containing concentrate and roughage at 58:42, respectively, with no additive (control treatment) or supplemented with malic acid at 30 g per cow daily (malic treatment). RESULTS: In Experiment 1, malic acid inclusion at 3 mg g−1 DM decreased in vitro methane production by 33%. In Experiment 2, malic acid decreased (P < 0.01) nutrient intake and increased nutrient digestibility. Greater (P < 0.05) milk yields, energy-corrected milk yields and milk component yields were observed in cows supplemented with malic acid. Greater milk (feed) efficiency was observed with malic acid treatment compared with the control treatment. CONCLUSION: The results show that the inclusion of malic acid at 30 g daily in the diet of lactating cows enhanced the nutrient digestibility and increased the milk production as well as feed efficiency.

Original languageEnglish
Pages (from-to)885-892
Number of pages8
JournalJournal of the Science of Food and Agriculture
Issue number2
Publication statusPublished - Jan 30 2019


  • feed additives
  • feed utilization
  • milk production
  • organic acids

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Agronomy and Crop Science
  • Nutrition and Dietetics

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