engleski

Reducing the impact of dairy farms on the environment of suburban settlements through early assessment of metabolic disorders in Holstein cows

The aim of this study was to define the prevalence risk of subclinical disorders of Holstein first parity cows depending on recording season and enable farm management optimization and consequently the reduction of the environmental impact of dairy farms. Test- day records of Holstein first parity cows gathered during the five years (January/2008 – December/2012) on farms in Eastern Croatia were used for the statistical analysis. The analysis indicated that daily fat and protein content, and F/P ratio, significantly differ due to recording season with the higher values of F/P ratio in winter period indicating higher ketosis prevalence risk, and lower values of F/P ratio in summer period indicating higher acidosis prevalence risk. Considering that many factors influence the variability of daily fat and protein content, and therefore the fat to protein ratio along with the prevalence risk of metabolic disorders, these factors should be taken into consideration when assessing the ketosis/acidosis prevalence in dairy cows based on milk recording data. Finally, accurate and timely assessment of prevalence risk of subclinical disorders will prevent the development of the clinical form of disorder and enable farm management optimization and consequently reduction of the impact of dairy farms on the environment of suburban areas.

environmental impact ; early assessment ; metabolic disorders ; Holstein cows ; milk recording

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