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Extended lactation may improve cow health and productivity and reduce greenhouse gas emission from organic dairy cows

Lehmann, Jesper Overgård; Mogensen, Lisbeth and Kristensen, Troels (2014) Extended lactation may improve cow health and productivity and reduce greenhouse gas emission from organic dairy cows. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 1, Istanbul, Turkey, no. 20, pp. 171-174.

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The concept of extended lactation is supposed to improve cow health and productivity and at the same time reduce greenhouse emission from high-yielding organic dairy cows in a product perspective. This effect is achieved through fewer calvings per year and hence a production of fewer replacement heifers, which then reduces the annual herd requirement for feed. We believe that the average milk yield per feeding day – days lactating plus days dry – per cow will be unchanged. However, this requires that the average cow will have to produce milk for a longer timeframe, and thus they will become older before being culled. We believe this will be a derived effect of the improved cow health as the majority of disease incidences occur around the time of calving. An on-going project at Aarhus University aims at characterising those cows, which can, and those cows which cannot produce milk for extended period of time before estimating the overall herd effect on farm economy and greenhouse gas emissions.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Extended lactation, dairy production, greenhouse gas emission
Agrovoc keywords:
EnglishDairy cowshttp://aims.fao.org/aos/agrovoc/c_26767
EnglishLactation durationhttp://aims.fao.org/aos/agrovoc/c_26854
EnglishGreenhouse gaseshttp://aims.fao.org/aos/agrovoc/c_34841
Subjects: Animal husbandry > Production systems
Animal husbandry > Production systems > Dairy cattle
Environmental aspects > Air and water emissions
Research affiliation: Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences
International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
Deposited By: Lehmann, Mr Jesper O
ID Code:23572
Deposited On:22 Oct 2014 06:49
Last Modified:22 Oct 2014 06:49
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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