Fatty acid, amino acid and mineral composition of milk from Nguni and local crossbred cows in South Africa

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dc.contributor.authorMapekula M.
dc.contributor.authorChimonyo M.
dc.contributor.authorMapiye C.
dc.contributor.authorDzama K.
dc.date.accessioned2011-10-13T16:58:46Z
dc.date.available2011-10-13T16:58:46Z
dc.date.issued2011
dc.description.abstractThis study was conducted to determine fatty acid, amino acid and mineral composition of milk from Nguni and crossbred cows in South Africa. Milk samples from 8 Nguni and 8 crossbred cows grazing on rangeland were collected once per lactation phase, i.e. early lactation (January), mid lactation (April) and late lactation (June) in 2009 for milk composition analyses. Nguni cows had higher (p<0.05) protein content, methionine, threonine, tyrosine, glycine and proline levels and n-6:. n-3 ratio, and lower (p<0.05) milk yield, fat and total solids content, potassium levels and total mono-unsaturated fatty acids (MUFA) than crossbred cows. Phosphorus levels were higher (p<0.05) in milk from Nguni cows in the early lactation compared to crossbreds. In the early and mimd lactation stages, milk from Nguni cows had higher (p<0.05) essential amino acids (arginine, phenylalanine, histidine, isoleucine and leucine), calcium levels and polyunsaturated fatty acids to saturated fatty acids (PUFA/SFA) ratios compared to crossbreds. Milk from crossbred cows in the mid and late lactations had higher (p<0.05) C12:0, C14:0, C16:0 and C18:0 levels than Nguni cows. It was concluded that milk composition of Nguni cows is more desirable for the calf and human consumption, especially in the early-to-mid lactation compared to that of crossbreds. © 2011 Elsevier Inc.
dc.description.versionArticle
dc.identifier.citationJournal of Food Composition and Analysis
dc.identifier.citation24
dc.identifier.citation05-Apr
dc.identifier.citationhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79958261029&partnerID=40&md5=c9a72780d8b655cb8134b6503bde9d67
dc.identifier.issn8891575
dc.identifier.other10.1016/j.jfca.2011.01.014
dc.identifier.urihttp://hdl.handle.net/10019.1/16847
dc.subjectBiodiversity
dc.subjectEssential amino acids
dc.subjectFatty acids
dc.subjectFood analysis
dc.subjectFood composition
dc.subjectMilk composition
dc.subjectMinerals
dc.subjectNguni cows
dc.titleFatty acid, amino acid and mineral composition of milk from Nguni and local crossbred cows in South Africa
dc.typeArticle
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