Resumo

ECHEVERRI ZULUAGA, José Julián  e  RESTREPO, Luis Fernando. Weather effects on production and milk quality in two municipalities of Antioquia-Colombia. Rev. Lasallista Investig. [online]. 2009, vol.6, n.1, pp.50-57. ISSN 1794-4449.

Introduction. In the tropical countries the meteorological changes exert an effect on the production and composition of milk, The most important effect is due to the temperature, precipitation, relative humidity and solar brightness. Materials and methods. More than 240,000 registers corresponding to the production and sanitary and composicional quality of the milk of dairy herds in 2 municipalities of the Department of Antioquia were collected during 4 years and associated to the changes in temperature, relative humidity, solar brightness and precipitation reported by IDEAM in the same period of time, the statistical analysis was carried out with SAS. Results. Was not correlation between the milk production, percentage of protein and fat, CSC and bacteriological quality, the analysis had statistical significance (p < 0,01), was significant effect of the temperature, the solar brightness, precipitation on the production parameters and quality of milk. Discussion. The results found in this investigation agree in their majority with the presented by other authors in similar investigations.Conclusions. Perhaps the parameters of production and quality of milk are affected by the change in the meteorological factors the main cause is the effect that these changes generate on the forage production in the dairy herds and the additional problems generated by caloric stress that physiologically undergo the bovines with these changes.

Palavras-chave : Milk production; milk quality; UFC; weather changes.

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