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Conference abstract2007

New improved designs and statistical analysis for production experiments with dairy cows

Hetta, Mårten; von, Rosen Dietrich


Due to the length of the experiments and the large number of animals involved in production experiments with dairy cows are expensive and time consuming. Traditionally, throughout an experimental period the experiments are based on individual daily recordings of milk production, feed intake and live weight. However, in most applied statistical analysis of the data, the experimental units which are analyzed are animalwise means taken over the experimental period, instead of the daily individual recordings. This results in relatively few observations, even if a large number of animals have been recorded over a long time. The development of new technologies for animal recording and data processing have open up possibilities for applications of statistical models based on repeated measurements that have been developed for research in animal science and medicine. The aim with this project is to evaluate the possibilities to apply new statistical models based on time series, profile and growth curve analysis. The project will evaluate the possibilities to reduce the observation time, without loosing statistical power, when analysing effects of different dietary treatments on intake, milk production as well as within day feeding behavior in diary cows

Published in


Nordic-Baltic Biometric Conference 2007

      SLU Authors

    • Hetta, Mårten

      • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences
    • UKÄ Subject classification

      Animal and Dairy Science
      Veterinary Science

      Permanent link to this page (URI)