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Adapted vs. conventional cattle genotypes: sustainability for organic and low input dairy production systems Organic Eprints
Zollitsch, Werner; Ferris, Conrad; Sairanen, Auvo; Rinne, Marketta; Steinwidder, Andreas; Horn, Marco; Moorby, Jon; Vestergaard, Mogens.
Dairy cow strains arising from conventional breeding programmes are frequently perceived as unsuitable for organic and low input milk production systems. While farmers have identified a number of breeds and strains as being ‘adapted’ to organic and low input systems, there is often little scientific evidence to indicate that these breeds are more appropriate than conventional genotypes. Thus the purpose of this study is to examine the response of different dairy genotypes (i.e. "conventional" versus "adapted") to an undersupply with nutrients and energy, which is a characteristic of low input systems with limited dietary supplementation and to provide information on the metabolic response of dairy cows to such dietary restrictions.
Tipo: Conference paper, poster, etc. Palavras-chave: Dairy cattle; Breeding and genetics.
Ano: 2014 URL: http://orgprints.org/23716/1/23716_MM.pdf
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COMPARISON OF GROWTH PERFORMANCE OF BEEF CALVES FROM DIFFERENT GENETIC STRAINS REARED UNDER ORGANIC CONDITIONs (D. 3.2) Organic Eprints
Cakmakci, Cihan; Jørgensen, Kirstine F.; Kristensen, Troels; Kargo, Morten; Vestergaard, Mogens.
The objective of the present study was to compare growth performance of 15 Danish Holstein bull (DHB) 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 puchased at private farms and arrived at approximately 20 days of age with an average initial body weight of 52.9, 58.5 and 56.1 kg, (SEM 2.6) for DHB, CB and CH, respectively. Calves were kept 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. There were significant differences between treatment groups in...
Tipo: Working paper Palavras-chave: Beef cattle.
Ano: 2013 URL: http://orgprints.org/24695/3/24695.pdf
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Produktionsøkonomi ved økologisk opdræt af Holstein tyre og Limousine x Holstein krydsningstyre og -kvier i et græsbaseret produktionssystem Organic Eprints
Munk, Arne; Vestergaard, Mogens; Kristensen, Troels.
Sammenfattende viser resultaterne, at LIM x DH tyre kan opdrættes i et græsbaseret produktionssystem med et forholdsvis fornuftigt restbeløb. Med økologitillæg og forventet slagtepræmie i perioden 2015-2020, kan der opnås et restbeløb til dækning af stald, arbejde og risiko på cirka 1.800 kr. per dyr (ca. 3,50 kr. per dag), selv om der gives et tillæg på 800 kr. per spædkalv i forhold til prisen på en renracet DH-tyr. For LIM x DH kvier kan der opnås et restbeløb på cirka 1.400 kr. per dyr (2,70 kr. per dag). Hvis krydsningstyrene og kvierne ses under et, kan der således opnås et restbeløb på cirka 1.600 kr. per krydsningsdyr (godt 3 kr. per dag) i gennemsnit under de nævnte forudsætninger. Med et restbeløb på 390 kr. per dyr er der ikke økonomi i at...
Tipo: Report Palavras-chave: Farm economics; Farming Systems; Beef cattle.
Ano: 2014 URL: http://orgprints.org/27960/7/27960.pdf
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