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Einfluss von biologischer und konventioneller Bewirtschaftung auf biologische Bodenqualitätsparameter: Entwicklungen im DOK Langzeitversuch nach pH-Regulierung

Oberholzer, Hans-Rudolf; Fließbach, Andreas; Mäder, Paul and Mayer, Jochen (2009) Einfluss von biologischer und konventioneller Bewirtschaftung auf biologische Bodenqualitätsparameter: Entwicklungen im DOK Langzeitversuch nach pH-Regulierung. Paper at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.

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Summary

In the long-term DOK field trial at Therwil, Switzerland, agricultural farming systems
are compared since 1978: CONFYM (mineral and organic fertilisers, synthetic
pesticides), BIOORG (organic fertilisers, mechanical weeding and biological disease
and pest control) and BIODYN (with composted manure and bio-dynamic
preparations), all of them at two fertiliser intensities of 0.7 and 1.4 livestock units per
ha, respectively. They are compared with CONMIN (conventionally managed,
exclusively minerally fertilised) and NOFERT (unfertilised control). CONFYM and
CONMIN were limed with 2.7 t CaCO3 ha-1 in 1999, CONMIN with additional 2 t
CaCO3 ha-1 in 2005, since pH values had dropped below officially recommended
values. In spring of 1998 and 2006 soil samples from 0 to 20 cm depth were analysed
for soil microbial biomass (substrate induced respiration SIR and chloroform
fumigation extraction CFE), soil respiration and dehydrogenase activity.
NOFERT and CONMIN exhibited the lowest microbial soil properties Manure
application influenced most soil microbial parameters positively. Differences between
treatments in soil microbial parameters were smaller in 2006 than in 1998 due to pH
regulation. Only CFE and dehydrogenase activity were higher in BIODYN than in
BIOORG and CONFYM in 2006. For physiological methods SIR and soil respiration,
no differences between these three systems were measured. Because of liming,
manure use, a wide ley rotation and equal plant residue management no more
differences between BIOORG and CONFYM, representing the predominant farming
systems in Switzerland were observed for all soil microbial properties.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:farming systems, soil microbial parameters, DOK long term field trial
Subjects: Soil > Soil quality > Soil biology
Soil > Soil quality
Research affiliation: International Conferences > 2009: Scientific Conference on Organic Agriculture > Pflanze und Boden > Bodenfruchtbarkeit und -biodiversität
Related Links:http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37
Deposited By: Oberholzer, Dr Hans-Rudolf
ID Code:14512
Deposited On:09 Apr 2009
Last Modified:12 Apr 2010 07:38
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen:
Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement
Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel.
Verlag Dr. Köster, Berlin.
Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37

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