THE EFFECTS OF ORAL ADMINISTRATION OF PROPYLENE GLYCOL AND CALCIUM PROPIONATE IN DAIRY COWS
2023
C. GAVAN | V. MOTORGA
This study was designed to determine the effects of the oral administration of propylene glycol and calcium propionate on performance of dairy cows. Treatments were 10 l water (control), 10 l water+300 ml propylene glycol (GP) and 10 l water+500 g calcium propionate (CP). Animals were mainly of Holstein breeds and were fed and managed in a commercial setting. The cows were divided randomly into an experimental group, n=24 (n=12 with PG and n=12 with CP) and a control group, n=11. Cows received the assigned treatment within 10 hours of calving and 24 hours after calving. Health events were recorded during calving and for the first 21 days in milk (DIM). Health examinations were performed on cows that appeared not well. The cows were milked three times daily and milk production was recorded electronically. Milk solid content and somatic cell score were determinate from three consecutive milking weekly till 20 DIM and than monthly till 110 DIM. Retained placenta, hypocalcaemia, displaced abomasums, ketosis and metritis were low in treatment groups (with PG and CP). The cows receiving PG had 2.8 Kg/day grater milk production than control group. The cows receiving CP had 1.7 kg/day grater milk production than control group. Prophylactic administration of PG and CP drenches to Holstein cows may be justified by potentially higher milk yields and reduced health complications.
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