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Influence of Reduced Tillage and Green Manures on Weed Emergence and Yield in Organic Farming (TILMAN-ORG SESSION)

Grosse, Meike; Haase, Thorsten and Heß, Jürgen (2014) Influence of Reduced Tillage and Green Manures on Weed Emergence and Yield in Organic Farming (TILMAN-ORG SESSION). In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 2, Thuenen Report, no. 20, pp. 411-414.

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Summary

If farmers want to use reduced tillage in organic agriculture, they often face great challenges in weed control. One goal of the European research project TILMAN ORG (www.tilman-org.net) was to develop a more efficient weed management and increased biodiversity through improved use of green manures in different systems of reduced tillage.
In a repeated one year trial on the research farm of University of Kassel the effects of different green manure species and different tillage systems on weed cover, density and biomass as well as yield of a subsequent main crop were examined. Sinapis alba, Trifolium resupinatum and Vicia sativa were tested as green manure species. Bare fallow served as control. After the green manures the main crop oat was sown in four different tillage systems: (1) plough, (2) chisel (2011/12) or disc harrow (2012/13), (3) mulching + drilling and (4) direct drilling.
In 2011/12, weed cover was generally low in the plough system compared to the other tillage systems. In the mulching + drilling- and direct drilling- systems V. sativa was able to suppress weeds considerably more efficiently than the other green manure treatments. The oat plots after the green manure species S. alba and T. resupinatum as well as the bare fallow had to be given up because weed pressure was too high. Instead, the oat yield in the mulching + drilling- and direct drilling treatments after green manure species V. sativa resulted in oat yields similar to the plough treatments. In the chisel system, oat yield in the V. sativa treatment was significantly higher than in the other green manure treatments. 2012/13 all mulching + drilling- and direct drilling- plots had to be given up because of too high weed pressure. In the disc harrow– system weed pressure differed not significantly from the plough system, but only green manure species V. sativa resulted in comparable oat yields.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Avena sativa, chisel, direct drilling, disc harrow, no-till, Vicia sativa, TILMAN-ORG, reduced tillage
Subjects: Crop husbandry > Soil tillage
Crop husbandry > Weed management
Research affiliation: European Union > CORE Organic II > TILMAN-ORG
International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
FP7 Grant Agreement Number:5523315
ISBN:978-3-86576-128-6
DOI:10.3220/REP_20_1_2014
Related Links:http://www.tilman-org.net, https://www.uni-kassel.de/fb11agrar/?id=38194&L=1
Deposited By: Grosse, Meike
ID Code:23876
Deposited On:29 Oct 2014 09:03
Last Modified:28 Nov 2014 13:13
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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