| Effects of seasonal changes in feeding management under part-time grazing on the evolution of the composition and coagulation properties of raw milk from ewes. | |
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MedLine Citation:
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PMID: 20723663 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Ewe raw milk composition, rennet coagulation parameters, and curd texture were monitored throughout the milk production season in 11 commercial flocks reared under a part-time grazing system. Milking season lasted from February to July. During that period, the diet of the animals shifted from indoor feeding, consisting of concentrate and forage, to an outdoor grazing diet. Lean dry matter, fat, protein, calcium, and magnesium contents increased throughout the milking season, as did rennet coagulation time, curd firmness, and curd resistance to compression. However, lean dry matter, protein content, and curd resistance to compression stabilized when sheep started to graze. Principal component analysis correlated curd resistance to compression and proteins, whereas curd firmness was highly correlated with fat content and minerals. Discriminant analysis distributed milk samples according to the feeding management. Curd firmness, fat, and magnesium turned out to be discriminant variables. Those variables reflected the evolution of the composition and coagulation parameters when fresh pasture prevailed over other feeds in the diet of the flocks. The present study shows that seasonal changes associated with feeding management influence milk technological quality and that milk of good processing quality can be obtained under part-time grazing. |
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Authors:
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E Abilleira; M Virto; A I Nájera; J Salmerón; M Albisu; F J Pérez-Elortondo; J C Ruiz de Gordoa; M de Renobales; L J R Barron |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 93 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-20 Completed Date: 2010-11-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 3902-9 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Tecnología de Alimentos, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed Animal Husbandry / methods Animals Caseins / analysis Chymosin / metabolism Dairying / methods* Diet / veterinary Fats / analysis Female Hydrogen-Ion Concentration Milk / chemistry* Milk Proteins / analysis Seasons Sheep* / physiology Spain |
| Chemical | |
Reg. No./Substance:
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0/Caseins; 0/Fats; 0/Milk Proteins; 9042-08-4/rennet; EC 3.4.23.4/Chymosin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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