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DIFFERENCES IN FEEDING PRACTICES ON ORGANIC AND CONVENTIONAL DAIRY FARMS – DATA FROM A FARM NETWORK

Warnecke, Sylvia; Schulz, Franziska; Paulsen, Hans Marten and Rahmann, Gerold (2014) DIFFERENCES IN FEEDING PRACTICES ON ORGANIC AND CONVENTIONAL DAIRY FARMS – DATA FROM A FARM NETWORK. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 2, Thuenen Report, no. 20, pp. 343-346.

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Summary

Organic and conventional feeding practices of dairy cattle differ due to specific regulations that are in place for organic farming. E.g., dairy cows must have access to pasture, and soybean extract, a very common concentrate in conventional dairy feeding, may not be fed. The joint project “Climate Effects and Sustainability of Agricultural Systems – Analyses in a Network of Pilot Farms” determined feeding practices and feed qualities on a total of 44 dairy farms (22 organic and conventional, each) in four German regions for 2008, 2009 and 2010. The average diets of the dairy cows differed considerably between organic and conventional dairy farms. Organic farms with a high percentage of hay in the diet were found in East and South Germany. The low percentage of concentrates in dairy rations is typical for the organic farms in the alpine region. In all regions the importance of grazing was significantly higher on the organic compared to conventional farms. Also, on conventional farms in the coastal region of North Germany grazing was of higher importance than in the other regions. Organic dairy cows received more fiber rich hay that produces relatively more CH4 and conventional dairy cows were fed more readily degradable concentrates that produce relatively less CH4. Hence, from the combination of diet and feed quality it can be expected that organic dairy cows produce slightly more CH4 from enteric fermentation per kg feed consumed (DM) than conventional dairy cows.
In summary, feedstuffs and their qualities were farm specific and should be considered in the calculation of methane emissions from enteric fermentation. Additionally, the differences in feeding regime have consequences for the primary energy use for feed production. These factors and must be considered in detail to conclude over greenhouse gas emissions from milk production on farm level.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
LanguageValueURI
Englishdairy cowshttp://aims.fao.org/aos/agrovoc/c_26767
Englishenteric methane emissionUNSPECIFIED
EnglishfeedingUNSPECIFIED
EnglishdietUNSPECIFIED
Subjects: Animal husbandry > Feeding and growth
Research affiliation: Germany > Federal Agency for Agriculture and Food - BLE
International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
ISBN:978-3-86576-128-6
DOI:10.3220/REP_20_1_2014
Related Links:http://www.pilotbetriebe.de
Deposited By: Warnecke, Sylvia
ID Code:23349
Deposited On:16 Oct 2014 12:06
Last Modified:16 Oct 2014 12:06
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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