| Autor: |
J, Okello-Onen, E M, Tukahirwa, B D, Perry, G J, Rowlands, S N, Nagda, G, Musisi, E, Bode, R, Heinonen, W, Mwayi, J, Opuda-Asibo |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Tropical animal health and production. 35(3) |
| ISSN: |
0049-4747 |
| Popis: |
The impact of tick control on the productivity of indigenous cattle was investigated in three herds of East African shorthorn Zebu and Zebu x Ankole (Nganda) breeds, maintained under three tick management systems practised under ranch conditions: twice-a-week dipping, once-a-month dipping, and no tick control. The milk production and the growth rates of pre-weaned and post-weaned calves were monitored once a month over a period of 34 months. Milk offtake was 23% higher during the heavy rainy seasons than in the long dry seasons. Twice-a-week dipping increased the milk offtake by 21% in the second year of study and prolonged the duration of lactation in cows. Similarly, twice-a-week dipping increased the pre-weaning growth rate by 39% in the second year of study, but had no significant effect on the post-weaning growth rate. Generally, the growth rate of calves were greatest during the heavy rainy seasons and least during the long dry seasons. These results provide a basis for assessing the losses under different tick management systems in the various production systems. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink