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

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

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 o...

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Veröffentlicht in:Lucrări științifice zootehnie şi biotehnologii 2023-09, Vol.47 (2), p.229-229
Hauptverfasser: Simona Baul, Ludovic-Toma Cziszter, Stelian Acatincai, Iulian Tripon, Silvia Erina, Dinu Gavojdian, Adela Marcu
Format: Artikel
Sprache:eng
Schlagworte:
calving season
dairy cows
lactose
milk quantity
proteins
romanian black spotted cows
solids non fat
total dry substance
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Zusammenfassung: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
ISSN:1841-9364
1841-9364