Seasonal Influences on Milk Yield and Composition Dynamics during a Normal Lactation in Dairy Cows. Milk Lactose, Solids Non Fat, Total Dry Matter Percentage

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
  • Iulian Tripon Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania
  • Silvia Erina 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
  • Adela Marcu Faculty of Animal Science and Biotechnologies, Banat University of Agricultural Sciences and Veterinary Medicine, 300645, Timisoara, Romania

Keywords:

calving season, dairy cows, lactose, milk quantity, proteins, Romanian Black Spotted cows, solids non fat, total dry substance

Abstract

Researches were made on 125 lactations from Romanian Black Spotted cows, aimed at studying the evolution of the interval between calving on milk quantity 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 proposed by Wood in 1967, called the incomplete gamma function. Lactation curve for lactose percentage was very different among seasons. Significant differences (p<0.05) were observed between summer-winter and spring-autumn, and distinct significant differences (p<0.01) between summer and spring. Flat pattern of the lactation curve for solids non fat percentage had the same shape for all seasons with distinct significant differences (p<0.01) between winter and autumn and very significant differences (p<0.001) between summer and autumn and spring and autumn.

References

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

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

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

Velea C., Cadar Olezia, Influenţa unor factori asupra principalelor componente ale laptelui de vacă, Lucrări şt. Zootehnie şi Biotehnologii, 2005, vol. 39 (2), Timişoara, pag. 318-324.

WOOD, P.D.P., Algebraic Model of the Lactation Curve in Cattle, Nature, nr. 5111, 1967, p. 164-165.

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Published

2023-09-05

Issue

Vol. 47 No. 2 (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.