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Ökologische Bewirtschaftung erfordert die Steuerung von innerbetrieblichen Nährstoffflüssen

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Sundrum, Albert (2013) Ökologische Bewirtschaftung erfordert die Steuerung von innerbetrieblichen Nährstoffflüssen. Paper at: 12. Wissenschaftstagung Ökologischer Landbau, Rheinische Friedrich-Wilhelms-Universität, Bonn, 5. bis 8. März 2013.

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Summary

Self-organised ecosystems are characterised by a high efficiency in the use of limited nutrient resources whereas the productivity is generally low. To utilise the potentials of agro-ecosystems with respect to a high nutrient efficiency, there is a need to steer the nutrient flow and provide good starting and adaptation conditions for living organisms.
While organic standards provide no operational guidelines on how to improve nutrient management, a concept was developed to improve N-efficiency on the farm level. N-import into the farm and N-flow through subordinate sub-systems (‘livestock’, ‘dung storage/ distribution’, ‘arable land/pasture’, and ‘feed storage/distribution’) were assessed on 9 organic and 7 conventional dairy farms, based on farm specific data and by making use of equations from the literature to estimate relevant figures.
N-efficiency varied considerably between sub-systems within and between farms, however showing no significant difference between the production methods. The results indicate a large but farm specific potential for improvements, contradicting any attempts of generalised statements and recommendations. Instead of minimum standards, a high level of N-efficiency that is beyond the average of conventional farms should be established as a leading aim in organic agriculture to justify claims.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Nährstoffeffizienz, Milcherzeugung, Agrarökosystem, Paradigmenwechsel
Subjects: Animal husbandry > Production systems > Dairy cattle
"Organics" in general
Knowledge management > Research methodology and philosophy > Specific methods > Surveys and statistics
Farming Systems
Knowledge management > Research methodology and philosophy > Systems research and participatory research
Animal husbandry
Animal husbandry > Feeding and growth
Knowledge management > Research methodology and philosophy > Specific methods
Environmental aspects
Knowledge management
Research affiliation: Germany > University of Kassel > Department of Animal Nutrition and Animal Health
International Conferences > 2013: Scientific Conference Organic Agriculture > Nature & environment
Related Links:http://www.wissenschaftstagung.de/, https://www.verlag-koester.de/index.php?id=114&tx_fbmagento
Deposited By: Sundrum, Prof. Dr. Albert
ID Code:21474
Deposited On:09 Sep 2013 12:33
Last Modified:27 Nov 2013 15:05
Document Language:German/Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 12. Wissenschaftstagung erschienen.
Dr. D. Neuhoff, C. Stumm, S. Ziegler u.a. (Hrsg.)
Beiträge zur 12. Wissenschaftstagung Ökologischer Landbau
Ideal und Wirklichkeit: Perspektiven ökologischer Landbewirtschaftung
Erscheinungsjahr: 2013
ISBN-13: 9783895748158
Verlag Dr. Köster, Berlin

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