Factores ambientales que afectan el intervalo entre partos en ganado blanco orejinegro
The purpose of the study was to evaluate the influence of the environmental factors on calving interval of Blanco Orejinegro cattle. The study was conducted in a mountainous zone, of intermediate temperature, in the north central part of Colombia. The adjusted average calving interval of 320 observations was 454.1 days and the date of conception averaged about 5.5 months after the date of parturition. Analysis of variance demostrated that effects asociated with location in the Experimental farm and age of dam were statistically significant at 1 and 5% level of probability, respectively. Season of calving approached significance. The other sources of variation (year of calving, sex of calf and interaction of year and season) did not show significance. Cows calving in the higher part of the farm (1.200 metres) had calving intervals 31 days larger than cows calving in the lower part (800 metres). Cows of less than 3 years had the largest calving interval and cows of 7 to 8 years of age had the shortest calving interval. The difference between the two groups was 69.5 days. In general, old cows had shorter intervals than young cows. The best season of calving in relation with fertility of cows was from January to March, the driest season of the year. The correlation of rainfall during season of calving with interval to the next parturition was 0.659 (P ( .01).
| Main Authors: | , |
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| Format: | article biblioteca |
| Language: | spa |
| Published: |
Instituto Colombiano Agropecuario
1983
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| Subjects: | Ganadería - L01, Ganado, Factores ambientales, Fertilidad, Producción, Ganadería y especies menores, |
| Online Access: | http://hdl.handle.net/20.500.12324/35329 |
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