3821: Mineralstickstoffgehalt im Boden in einem ökologischen und einem konventionellen Pflanzenproduktionssystem [Soil mineral nitrogen contents in an ecological and a conventional crop production system ]

Jonczyk, Krzysztof and Igras, Janusz (2005) Mineralstickstoffgehalt im Boden in einem ökologischen und einem konventionellen Pflanzenproduktionssystem [Soil mineral nitrogen contents in an ecological and a conventional crop production system ]. Poster presented at 8. Wissenschaftstagung Ökologischer Landbau - Ende der Nische, Kassel, 01.03.2005 - 04.03.2005; Published in Heß, J and Rahmann, G, Eds. Ende der Nische, Beiträge zur 8. Wissenschaftstagung Ökologischer Landbau.

Summary

An ecological five-year rotation of potato - spring barley with undersown grass clover – grass clover – grass clover – winter wheat with cover crop and a conventional three-year rotation of winter rape – winter wheat – spring barley systems were compared for soil mineral nitrogen content in 0-90cm from 2000-2003. The research was conducted on a field trial located at the Experimental Station in Osiny (Lublin province, Poland) on grey brown podzolic soil. In the ecological rotation, mineral nitrogen contents increased over time while in the conventional system the contents were the same after three years. However, depending on the crop and year there were large losses. The largest potential for Nmin losses was observed after grass clover in the ecological, and after rape in the conventional system.

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