Beitrag in einem Tagungsband
Ökologische Bewirtschaftung erfordert die Steuerung von innerbetrieblichen Nährstoffflüssen

Details zur Publikation
Sundrum, A.
Neuhoff, Daniel; Stumm, C.; Ziegler, S.; u.a
Verlag Dr. Köster
Verlagsort / Veröffentlichungsort:
Beiträge zur 12. Wissenschaftstagung Ökologischer Landbau. Ideal und Wirklichkeit: Perspektiven ökologischer Landbewirtschaftung

Zusammenfassung, Abstract
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.

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Zuletzt aktualisiert 2019-25-07 um 19:56