Milk production with oxytocin in dual purpose cows under Mexican humid tropic conditions
The objective was to evaluate the milk harvest and body weight in dual purpose cows and daily gain in their calves derived from the use of oxytocin (OT) during the 60 days in lactation. Multiparous cows (Bos Taurus x Bos indicu) were assigned 8-10 days postpartum to treatment in three different locations: La Isla (RLI), control (T0, n=6) calf stimulation and T1 (n=6) 10 IU/day of OT s.c. or calf stimulation (alternate periods of two weeks). Las Palmas (RLP), Group 1 (n=9) 8 IU/day OT or needle injection and Group 2 (n=9) needle injection or 8 IU/day OT (alternate periods). Los Rejones (RLR), control (T0, n=10) received nothing and T1 (n=10) 8 IU/day of OT s.c. am and pm. The OT treatments increased (P<0.05) milk harvest 28 to 40 %. In RLP milk harvest was greater (P<0.05) in cows with OT compared with needle injection. In RLR, cows 3/4 Bos taurus had better milk harvest (P<0.01) to OT compared with 7/8. The control cows in RLI lost less weight (P<0.01) compared with OT (17.24 kg vs 51.08 kg) and their calves had better (P<0.01) weight gains that those of OT (719.46 ± 48 vs 561.67 ± 48 g/day); however, results were not similar in the other locations. The use of OT in early lactation increases milk harvest in tropical cows; however, body weigh lost in cows maybe greater and daily gain in calves maybe reduced.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Asociacion Latinoamericana de Produccion Animal
2007
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| Online Access: | https://ojs.alpa.uy/index.php/ojs_files/article/view/506 |
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