Assessment of fodder-production systems on sandy soils from an environmental and economic perspective - calculation of an eco-efficiency scale. [German]Original Title Bewertung von Futterbausystemen auf Geeststandorten aus okologischer und okonomischer Sicht - Bestimmung eines Oko-Effizienzmasses.

摘要

This paper investigates typical fodder production systems on sandy soils from the environmental and economic perspectives. To this end, an eco-efficiency scale was first defined and then calculated using the "free disposal hull-analysis". The goals of the eco-efficiency analysis were to quantify the negative environmental effects resulting from nitrate leaching and co₂-emmisions and to measure the eco-efficiency of the analysed fodder production systems. Eco-inefficient units would be able to bring about a maximum reduction of both negative effects when they applied one of the alternative eco-efficient systems that had been identified. The employed method ensures that eco-efficient systems lead only to environmental improvement but not to a reduced gross margin per hectare compared to the reference situation. The results of the empirical analysis showed that the nitrate leaching caused by fodder production was able to be reduced by 14% and the co₂-emissions by 11% respectively through farm strategies. Depending on the fodder production system applied, an average farm in Schleswig-Holstein could achieve a reduction of up to 232 kg nitrate and 6790 kg co₂ per farm per year. In addition to this significant environmental potential for improvement, the farms would at the same time be able to achieve an increase of the gross margin from fodder production by up to 8000 Euro per farm and year.