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| Registros recuperados: 22 | |
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| Vestergaard, M.; Andersen, H.R.; Lund, P.; Kristensen, T.; Hansen, L.L.; Sejrsen, K.. |
| Low profitability is believed to be the greatest hindrance profitability is believed to be the greatest hindrance for a more extensive use of dairy breed bull calves in for a more extensive use of dairy breed bull calves in organic beef production systems organic beef production systems Among certain consumers, there is an increasing interest Among certain consumers, there is an increasing interest for organic beef production for organic beef production However, there is a need for reliable information about However, there is a need for reliable information about and documentation for production parameters, methods and documentation for production parameters, methods for rearing and housing, feeding strategies etc. to be able for rearing and housing,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2005 |
URL: http://orgprints.org/10027/1/10027.pdf |
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| Vestergaard, M.; Jensen, S.K.; Therkildsen, M.. |
| The organic rules require that bull calves are raised outdoor at least 6 months a year in Denmark and are fed at least 60% roughage of the total diet. These rules are a constraint for an organic production of beef based on the bull calves born in the organic dairy herds because of extra labor costs, expected lower growth rate, difficulties in raising bull calves outdoor, possibly lower meat quality and lack of sufficiently high organic premium payment for the carcass. Thus, the bull calves are sold for conventional fattening. The supply of organic beef from young cattle is concomitantly very limited. However, in order to obtain the necessary higher payment for beef from organic-raised young cattle, it is important that consumers like the beef from grass-... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems; Animal husbandry. |
| Ano: 2012 |
URL: http://orgprints.org/22054/3/22054.pdf |
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| Therkildsen, M.; Vestergaard, M.. |
| Production of organic beef from young cattle is not very developed in Denmark, in spite of a well-established organic dairy production with male off-spring. These calves are sold to conventional production, because of low performance in organic production systems. The purpose of this study was to test a concept for production of organic beef based on crossbred animals from dairy cows sired with a beef breed. The experiment included a comparison between spring-born pure-bred Holstein bulls (HB), crossbred Limousin x Holstein bulls (CB) and heifers (CH), 15 of each group. After weaning the calves were raised outdoor on pasture the 1st summer and indoor on a low energy grass-haylage ration over winter followed by pasture the 2nd summer and slaughter at a... |
| Tipo: Proceedings |
Palavras-chave: Production systems Food security; Food quality and human health Beef cattle. |
| Ano: 2014 |
URL: http://orgprints.org/27304/7/27304.pdf |
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| Therkildsen, M.; Vestergaard, M.. |
| Production of organic beef from young cattle is not very developed in Denmark, in spite of a well-established organic dairy production that could deliver bull calves for use in organic beef production. Instead these calves are sold to conventional beef producers, because of low performance in organic production systems. The purpose of this study was to test a concept for production of organic beef based on crossbred animals from dairy cows sired with a beef breed. The results show that crossbred Limousine X Holstein bulls and heifers may be an alternative to purebred Holstein bulls in organic beef production of young cattle because of improved gain and carcass conformation, aroma and taste. However, the fatness and texture of the crossbred bulls need to... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Food security; Food quality and human health Beef cattle. |
| Ano: 2014 |
URL: http://orgprints.org/27746/7/27746.pdf |
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| Jorgensen, K. F.; Kjeldsen, A.M.; Strudsholm, F.; Vestergaard, M.. |
| A data analysis based on the Danish Cattle Data Base shows that organic Holstein-Friesian cows have significantly higher frequencies of liver abscesses (LA) than conventional Holstein-Friesian cows (8% versus 5%). Based on a questionnaire among 91 organic dairy herds, a statistical analysis was made in order to identify which feeding and management factors that were related to the level of LA in the herds. Compared with conventional herds, the feed ration in organic herds had a lower energy and fatty acid level and a higher starch level. During summer season the organic herds had a lower level of digestible cell walls in the ration. Organic herds with a higher grazing level had a higher level of LA (P=0.012). Increasing levels of grain also tended to... |
| Tipo: Proceedings |
Palavras-chave: Health and welfare; Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/5953/1/5953.doc |
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| Vestergaard, M.; Jørgensen, K.F.; Munk, A.; Cakmakci, C.; Kargo, M.; Therkildsen, M.; Kristensen, T.. |
| The objective of the present study was to compare growth performance, carcass quality characteristics, and production economy of 15 Danish Holstein bull (HB) calves, 15 Limousine x Danish Holstein crossbred bull (CB) calves and 15 Limousine x Danish Holstein crossbred heifer (CH) calves reared under organic conditions. Spring-born calves were purchased at private farms and at approximately 20 days of age with an average initial body weight of 52.9, 58.2 and 56.1 kg, (SEM 2.6) for HB, CB and CH, respectively. Calves were housed indoor until weaning at 3 months of age. Calves were gradually introduced to a grass-silage based ration from 3 to 4 months of age. From 4 to 7 months calves were kept on mix grass pasture of ryegrass and white clover. From 7 to 13.5... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2014 |
URL: http://orgprints.org/27752/3/27752.pdf |
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| Jorgensen, K.F.; Larsen, S.B.; Andersen, H.R.; Vestergaard, M.. |
| Organic dairy cows in Denmark has a higher frequency of liver abscesses, which is probably due to higher starch levels in the feed rations to high yielding cows compaired to conventional cows. Following abstract is based on experiments on young bulls and demonstrates whether replacing high-starch feeds with low-starch feed, such as dried grass pellets and sugar beet pulp, can reduce the problems with liver abscessation without reducing the performance level. The low-starch feed would be relevant to organic dairy production. In total, 41 Danish Friesian bulls (154±20 kg LW) were allocated into four treatment groups in a 2x2 factorial design fed either a high starch (N) or a high fibrous concentrate (F) and either chopped barley straw (S) or a mixture of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Health and welfare; Feeding and growth; Beef cattle; Denmark. |
| Ano: 2004 |
URL: http://orgprints.org/3931/1/3931.pdf |
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| Registros recuperados: 22 | |
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