Composition of milk of native Greek goats in the region of metsovo
1991; Elsevier BV; Volume: 4; Issue: 1 Linguagem: Inglês
10.1016/0921-4488(91)90052-r
ISSN1879-0941
AutoresE. Simos, L.P. Voutsinas, Christophoros P. Pappas,
Tópico(s)Animal Diversity and Health Studies
ResumoMorning and evening samples from bulk goat milk collected from 164 animals in their second and third lactation of the native breed in the region of Metsovo, Greece, were separately analysed during the period after weaning (mid March) until drying-off (end of July). Mean percentage milk contents, with standard deviations, were: fat 5.18±0.396, total protein 3.56±0.063, casein 2.80±0.060, lactose 4.74±0.181, total solids 14.12±0.381, solids-non-fat 8.94±0.218 ash 0.76±0.037. Mean contents (mg/ 100 ml) of calcium, magnesium, sodium and potassium were 141.11 ± 5.741, 13.81 ± 1.571, 47.90±3.743, and 161.65±4.423, respectively. Average values for physicochemical properties were: acidity (as lactic acid %) 0.17±0.015, pH 6.55±0.068 and density 1.030±0.0002. The average annual milk yield was 90 kg/head. There were considerable variations in the concentrations of main constituents during lactation. Fat content decreased progressively with advancing lactation. Protein and casein contents were fairly constant over the lactation. Lactose content increased during the first 2 months after weaning and then decreased until the end of lactation. Morning milk was richer in main constituents than the evening milk, but significant (P<0.05) were only the differences for fat and total solids. Correlations between milk constituents are reported.
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