Milk of Italian Saddle and Haflinger nursing mares: physico – chemical characteristics, nitrogen composition and mineral elements at the end of lactation
| Autor: | Francesca Martuzzi, Primo Mariani, Paolo Formaggioni, Andrea Summer |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Italian Journal of Animal Science, Vol 3, Iss 3, Pp 293-299 (2010) |
| Druh dokumentu: | article |
| ISSN: | 1594-4077 1828-051X |
| DOI: | 10.4081/ijas.2004.293 |
| Popis: | Aim of this work was to investigate nursing mares milk characteristics at the end of lactation (D) and to make a comparisonwith milk taken during early lactation (3 to 30 d post partum) (E). The survey was carried out on 17 Italian Saddlemares (IS) (193 days in milk; 147 pregnancy days) and on 12 Haflinger mares (H) (174 days in milk; 146 pregnancydays). N fractions were determined by means of Kjeldahl; fat and lactose by means of mid infrared lectures; mineral elementswere determined by Atomic Absorption Spectrophotometry; P by colorimetry. Data referring to 58 individual milksamples were analyzed by ANCOVA. Significant variations, similar in both breeds, were observed (E vs D) for density at15°C (1.036 vs 1.034), pH (6.94 vs 7.24), titratable acidity (3.56 vs 1.70 °SH), fat (1.17 vs 0.76% g/100g of milk),crude protein (2.31 vs 1.68% g/100g), casein number (52.37 vs 46.59) and ash (0.50 vs 0.30% g/100g); similarly(mg/100g) for non casein N (172.31 vs 142.05), non protein N (34.43 vs 29.09), P (61.30 vs 32.48), Ca (112.88 vs54.42), Mg (8.40 vs 4.38) and K (60.77 vs 41.31). Freezing point, lactose and Na showed no significant variations. Atthe end of lactation, milk resulted poorer in all main organic components, except lactose, and in all mineral components,except Na. Only freezing point and phosphorus variations differed in IS from H. Breed significantly affected fat, casein Nand ash mean contents. |
| Databáze: | Directory of Open Access Journals |
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