• Morteza KORDI Department of Animal Science, Faculty of Agriculture, Yasouj University, Yasouj, Iran
  • Abbas Ali NASERIAN Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
  • Reza VALIZADEH Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
  • Abdol Mansour TAHMASBI Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran


barley grain, dried citrus pulp, pectin, starch, sugar beet pulp


This study investigated the effect of feeding pectin-rich by-products, as a replacement for barley grains, on the performance of Holstein dairy cows. Eight cows were assigned to four dietary treatments in a 4 × 4 Latin square design and fed for 21 days. The experimental diets consisted of 370 g.kg-1 roughages and 630 g.kg-1 concentrates. The diet contained 100 g.kg DM-1 barley grains (BG, control diet), sugar beet pulp (SBP, treatment 2), wheat bran (WB, treatments 3) or dried citrus pulp (DCP, treatment 4). There were no significant differences (P > 0.05) among the treatments for dry matter intake (DMI) (kg.d-1), milk production, milk composition and blood metabolites. Eating behaviour was not affected by the treatment (P > 0.05). However, the differences among the treatments for eating behaviour as min.kg-1 of neutral detergent fiber intake (NDFI) were significant (P < 0.05). These data suggest that the substitution of these by-products instead of barley grains for up to 10 % of in diet DM for dairy cows did not have any adverse effects on animal performance.


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