Macro- and micro-elements’ concentration in goat milk during lactation
Nina Strzalkowska, Emilia Bagnicka, A. Józwik und J. Krzyzewski
The aim of this study was to investigate the changes in mineral contents (basic macroand micro-elements) in milk of goat, which were maintained under unified conditions. The study was carried out on 176 Polishs White Improved goats (N = 2365 daily milk samples), during six years. The somatic cell count (SCC) and Na, K, Ca, Mg, Zn, Cu, Fe and P concentration in each milk sample were evaluated. The mineral concentration was significantly dependent on year and month of study, stage of lactation, parity and SCC. The smallest fluctuation was found for calcium content (amplitude 7 %). A little higher fluctuation was observed for content of sodium (14 %) and then for iron, magnesium,
phosphorus and potassium (19 % for each). The highest fluctuations were found for zinc (32 %) and copper (39 %) contents. The content of basic minerals in goat milk during lactation undergoes some changes. The range of those changes depends on many factors. The main factors assumed sufficient supply of required minerals are age of goats, daily milk yield, SCC, month and year of study.
Keywords/Stichworte:Goat, milk, mineral composition
phosphorus and potassium (19 % for each). The highest fluctuations were found for zinc (32 %) and copper (39 %) contents. The content of basic minerals in goat milk during lactation undergoes some changes. The range of those changes depends on many factors. The main factors assumed sufficient supply of required minerals are age of goats, daily milk yield, SCC, month and year of study.