Effects of long term feeding dairy cows on a diet supplemented with clinoptilolite on certain haematological parameters
Katsoulos, P.D.(Aristotle Univ. of Thessaloniki (Greece). School of Veterinary Medicine) | Roubies, N. | Panousis, N.E-mail:[email protected] | Christaki, E. | Karatzanos, P. | Karatzias, H.
The aim of the present study was to investigate whether the long term supplementation of two levels (1.25 and 2.5%) of clinoptilolite in the concentrate feed of dairy cows has any effect on their haematological parameters. Fifty-two clinically healthy Holstein cows were randomly assigned to one of three groups according to their age and parity. The group A was offered a concentrate feed supplemented with 1.25% clinoptilolite, the group B was offered the same feed supplemented with 2.5% clinoptilolite. The group C served as control. The experiment started 30 days before the expected parturition and lasted up to the end of lactation. Blood samples, collected before the start of experiment, at the day of calving and then at monthly intervals, were tested for packed cell volume (PCV), hemoglobin (Hb) and leukocyte count (WBC) values. Clinoptilolite supplementation had no adverse effect on the haematological parameters tested.
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