Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk
7 pages, 5 tables.-- Available online 3 July 2009.
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Elsevier
2009-06
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| Subjects: | Vegetable fats, Milk performance, Milk CLA, Dairy ewe, |
| Online Access: | http://hdl.handle.net/10261/19584 |
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dig-igm-es-10261-195842022-04-07T10:01:36Z Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk Castro, Teresa Manso, Teresa Jimeno, Vicente del Alamo-Sanza, Maria Mantecón, Ángel R. Vegetable fats Milk performance Milk CLA Dairy ewe 7 pages, 5 tables.-- Available online 3 July 2009. Two experiments were carried out to study the effects of supplementing the ration of lactating ewes with vegetable fats (sunflower oil, SO or hydrogenated palm oil, HPO; HIDROPALM (R)) on diet digestibility, milk yield and milk composition, and on the concentration of the conjugated linoleic acid (CIA) C18:2 cis-9 trans-11 and C18:1 trans-11 (vaccenic acid, VA) and other main fatty acids in milk fat. Treatments involved a control diet, without added oil, and 2 diets supplemented with either 12 g/kg SO or 12 g/kg HPO on a dry matter (DM) basis. In the first experiment, 6 non-pregnant, non-lactating Lacaune ewes were used following a 3 x 3 replicated Latin Square design. Addition of vegetable fat supplement to the diet increased digestibility of DM, organic matter (OM) and crude protein (CP), but did not affect that of the ether extract (EE), neutral detergent fibre (NDF) or acid detergent fibre (ADF). In the second experiment, 60 Lacaune dairy ewes mid-way through lactation (120 +/- 12 days in milk, 0.98 +/- 0.03 kg/day average milk yield) were divided into three equal-sized groups each of which was assigned to one of the three experimental diets for 4 weeks. Compared with the control treatment, supplementation with H PO increased milk yield and energy-corrected milk. But neither vegetable fat supplement modified percentages of fat and protein in milk. Supplementation with HPO increased C14:1, C16:1 and C16:0 content and reduced C18:0 and C18:1 cis-9 content in milk fat. Supplementation with SO increased the VA content in milk fat by 36% and that of cis-9 trans-11 CLA by 29% in comparison with the control diet. Supplementation with HPO led to milk fat with 15% more cis-9 trans-11 CLA than control milk. In conclusion, adding a moderate dose of HPO or SO to the diets increased CIA concentration in milk fat. Nevertheless, supplementation with SO was more effective than HPO in increasing CLA concentration in milk fat and reducing the atherogenicity index, improving milk quality from the human health standpoint. Complutense University of Madrid PR3/04-12381 Peer reviewed 2009-12-15T13:00:32Z 2009-12-15T13:00:32Z 2009-06 artículo http://purl.org/coar/resource_type/c_6501 Small Ruminant Research 84 (1-3): 47-53 (2009) 0921-4488 http://hdl.handle.net/10261/19584 10.1016/j.smallrumres.2009.05.005 en http://dx.doi.org/10.1016/j.smallrumres.2009.05.005 none 22195 bytes application/pdf Elsevier |
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Vegetable fats Milk performance Milk CLA Dairy ewe Vegetable fats Milk performance Milk CLA Dairy ewe |
| spellingShingle |
Vegetable fats Milk performance Milk CLA Dairy ewe Vegetable fats Milk performance Milk CLA Dairy ewe Castro, Teresa Manso, Teresa Jimeno, Vicente del Alamo-Sanza, Maria Mantecón, Ángel R. Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| description |
7 pages, 5 tables.-- Available online 3 July 2009. |
| format |
artículo |
| topic_facet |
Vegetable fats Milk performance Milk CLA Dairy ewe |
| author |
Castro, Teresa Manso, Teresa Jimeno, Vicente del Alamo-Sanza, Maria Mantecón, Ángel R. |
| author_facet |
Castro, Teresa Manso, Teresa Jimeno, Vicente del Alamo-Sanza, Maria Mantecón, Ángel R. |
| author_sort |
Castro, Teresa |
| title |
Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| title_short |
Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| title_full |
Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| title_fullStr |
Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| title_full_unstemmed |
Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk |
| title_sort |
effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (cla) in milk |
| publisher |
Elsevier |
| publishDate |
2009-06 |
| url |
http://hdl.handle.net/10261/19584 |
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1777663830118105088 |