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Maiserträge und Humusbilanzen in ökologischen Energiepflanzen-Fruchtfolgen mit Gärrestdüngung Organic Eprints
Levin, Karin; Simon, A.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen.
The long-term effects of biogas production in organic farming on soil fertility due to changes in crop rotations and the removal of carbon from these systems are, at present, unclear. Data from a long-term field trial in Bavaria, Germany were used to evaluate the effects of different crop rotations and fertilization with biogas digestate on maize yields and humus balances. Digestate fertilization led to higher maize yields compared with an unfertilized control. Maize yields were lower when the maize was sown directly into a white clover cover crop. Humus balances show the importance of considering both the return of organic matter via fertilization and crop rotation design to ensure that soil fertility is not depleted
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management; Root crops.
Ano: 2017 URL: http://orgprints.org/31554/1/Maisertr%C3%A4ge%20und%20Humusbilanzen%20in%20%C3%B6kologischen.pdf
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Untersuchung der Auswirkungen von ökologisch erzeugten Biogasgärresten auf Bodenqualität – Ein Methodeneignungstest Organic Eprints
Simon, A.; Levin, Kain; Cyffka, L-S; Simon, R.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen.
Biogas digestate is a by-product of the biogas process and contains high amounts of nitrogen, which makes it a valuable organic fertiliser. In a field trial near Freising, different crop rotations for biogas production were established in 2004/05 and fertilised with digestate only or were not fertilised (controls). A wide range of methods for soil analysis was used between 2013 and 2015 to identify the methods capable of showing a biogas digestate effect on soil quality. We learned that aggregate stability, C and N contents, and the number of earthworms showed significant differences between fertilised and unfertilised plots, while pH, water infiltration, bulk density and pore size distribution were not able to show biogas effects.
Tipo: Conference paper, poster, etc. Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017 URL: http://orgprints.org/31560/1/Untersuchung%20der%20Auswirkungen%20von%20%C3%B6kologisch%20erzeugten.pdf
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