Relationship between feeding on production and health performances of Holstein Friesian cow
1999
Somchai Chanphongsaeng | Krit Angkhanaphon (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Science)
This study aimed to assess the effects of feeding system on the productive performances and health status of Holstein Friesian dairy cattle. Four dairy farms were chosen,three purebred Holstein farms and one crossbred Holstein with the total number of 136 heads of dairy cattle. Each animal, the analysis of bodyweight change, body condition score(BCS), amount of feed offered, milk yield, reproductive performances, health history, milk comprosition and blood chemistry were performed. The study showed that the animal received 9.20 to 12.15 kg dry matter of feed equivalent to 2.51 percent to 2.75 percent bodyweight loss was found in purebred during 4 weeks postpartum which was equivalent to 34.5 kg or 0.82 kg/day. In crossbred cattle most of body weight lost during 8 weeks postpartum which was equivalent to 42.4 kg or 0.61 kg/day. Decreasing of BCS was more prominent in crossbred than in purebred (0.9 vs 0.84) Milk yield from purebred was significantly higher than crossbred (p0.05). At peak, purebred produced 25.8 percent more milk than crossbred. No difference was found in milk composition but there was an incidence showing that crossbred had the tendency to produce more percentage of milk fat than purebred. First service conception rate postpartum was found to be lower in crossbred than purebred, The result showed that season could affect conception rate in both types of the animals. Most of the blood to 3 weeks prepartum was higher than the reference value while BUN at all stage was lower. The most serious problem of health found in this study was mastitis. there were 25 percent of all animals suffering from this disease. Lameness was found to be the second serious problem. Both of health problems were affected by the characteristics of housing and management.
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