Effects of stage and number of lactation on the chemical composition of goat milk

• Published in: Czech Journal of Animal Science Vol. 46; no. 12
• Main Authors: Antunac, N, Samarzija, D, Havranek, J.L, Pavic, V, Mioc, B. (University of Zagreb (Croatia). Faculty of Agriculture)
• Format: Journal Article
• Language: English
• Published: 01.12.2001
• Subjects: ASH CONTENT; CALCIO; CALCIUM; CHEMICAL COMPOSITION; COMPOSICION QUIMICA; COMPOSITION CHIMIQUE; CONTENIDO DE CENIZA; CONTENIDO DE LIPIDOS; CONTENIDO DE MATERIA SECA; CONTENIDO PROTEICO; DRY MATTER CONTENT; DURACION DE LA LACTANCIA; DUREE DE LA LACTATION; FOSFORO; GOAT MILK; LACTATION DURATION; LACTATION NUMBER; LACTOSA; LACTOSE; LAIT DE CHEVRE; LECHE DE CABRA; LIPID CONTENT; NUMERO DE LACTACION; NUMERO DE LACTATION; PHOSPHORE; PHOSPHORUS; PROTEIN CONTENT; TENEUR EN CENDRES; TENEUR EN LIPIDES; TENEUR EN MATIERE SECHE; TENEUR EN PROTEINES
• ISSN: 1212-1819

The aim of this research was to establish the effects of stage and number of lactation on changes in the chemical composition of goat milk (Alpine and Saanen) during five consecutive lactation periods. All animals were milked manually and kept under the same accommodation and feeding conditions. Milk analyses included determinations of the content of dry matter, solids non fat, fat, protein, lactose, ash, calcium and phosphorus. Established average minimum and maximum contents were as follows: dry matter: 11.15-11.90 %; solids non fat: 7.89-8.48 %; fat: 3.26- 3.58 %; proteins: 2.73-3.04 %; lactose: 4.18-4.50 %; ash: 0.792-0.802 %; calcium: 0.110- 0.124 %; phosphorus: 0.083-0.092 %. During the five lactations, significantly higher (P 0.01) contents of dry matter, solids non fat, lactose, calcium and (partially) phosphorus were determined at the beginning in comparison with the middle of lactation. Correlations were established between the content of dry matter and the content of solids non fat (0.76), fat (0.77), protein (0.64) and lactose (0.46).