Seasonal Influences on Milk Yield and Composition Dynamics during a Normal Lactation in Dairy Cows: Milk Yield, Fat and Protein Precentage

Authors

  • Simona Baul Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Ludovic-Toma Cziszter Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Stelian Acatincai Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Dinu Gavojdian Research and Development Station for Sheep and Goats of the Romanian Academy for Agricultural Sciences and Forestry, 325400, Caransebes, Romania
  • Silvia Erina Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Adela Marcu Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Genoveva Buzamat Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Gabriel George Răducan Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania

Keywords:

calving season, dairy cows, milk yield, proteins, Romanian Black and White Spotted breed.

Abstract

Researches were made on 125 lactations from Romanian Black Spotted cows and aimed to study the evolution of the interval between calving on milk yield and quality. Data were recorded and statistically analyzed by means of ANOVA / MANOVA determining the average values and dispersion indices. Based on averages parameters of lactation curves were calculated using the mathematical model called the incomplete gamma function. Cows that calved in winter and spring had steeper lactation curves for milk yield. The lactation curve for butter-fat percentage was significantly different (p<0.05) between summer-winter and summer-autumn seasons. Evolution of the lactation curve for protein percentage was significantly different (p<0.05) between winter and spring, distinct significant (p<0.01) between summer-autumn, winter-autumn and very significant (p<0.001) between spring and autumn.

References

Stanciu, G., Cziszter, L.T., Acatincăi, S., Contribuţii la cunoaşterea unor factori care influenţează aspectul curbei de lactaţie la vacile din rasa Bălţată românească, 1996, Simpozion ştiinţific internaţional de zootehnie, 13 decembrie Iaşi

Stanciu, G., Tehnologia creşterii bovinelor, Ed. Brumar, 1999, pp. 125-130

Cziszter, L.T., Dirijarea funcţiei glandei mamare, Ed. Eurostampa, 2003, pp. 130-133

Acatincai, S., Tehnologia cresterii bovinelor, Ed. Agroprint, 2010, pp. 77-83

Wood, P.D.P., Algebric Model of the Lactation Curve in Cattle, Nature, 1967, 5111, 164-165.

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Published

2023-09-05

Issue

Vol. 47 No. 1 (2014): Scientific Papers: Animal Science and Biotechnologies

Section

Technologies Applied in Animal Husbandry

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.