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Effects of intercropping and fertilization on weed abundance, diversity and resistance to invasion

Sans, F. X. and Altieri, M. A. (2005) Effects of intercropping and fertilization on weed abundance, diversity and resistance to invasion. Paper at: Researching Sustainable Systems - International Scientific Conference on Organic Agriculture, Adelaide, Australia, September 21-23, 2005. [Unpublished]

[thumbnail of Sans_Altieri_4p_revised-ed.doc] Source file - German/Deutsch
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This paper aims to evaluate the effects of the cover crop type (Vicia villosa monoculture vs. V. villosa and Hodeum vulgare polyculture) and the type of fertilization (organic vs. chemical) on the structure of the weed community (biomass, number of species, diversity and evenness) and its invasibility through the experimental introduction of Brassica sp. seeds as a target invader species. Results show that weed biomass, species richness and diversity of the weed community are significantly reduced by inter-cropping, but are not affected by the type of fertilization. In organic plots, the density increases and the complementary pattern of polyculture resource use reduces weed abundance and Brassica sp. invasion, while the rapid emergence and fast growth of weeds can explain the Brassica sp. invasion resistance in monoculture. In contrast, chemical fertilization favours Brassica growth.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:cover crop, weeds, diversity, evenness, invasion.
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: International Conferences > 2005: 1st ISOFAR Conference > 2005: 1st ISOFAR Conference
Related Links:https://orgprints.org/4013/, http://www.isofar.org/adelaide2005, https://orgprints.org/view/projects/int-conf-isofar-2005.html
Deposited By: ISOFAR
ID Code:4468
Deposited On:15 Nov 2005
Last Modified:12 Apr 2010 07:30
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:The paper presented here is the final paper submitted by the authors to the conference Researching Sustainable Systems.
The final edited papers are available with the following publication:
Köpke, Ulrich; Niggli, Urs; Neuhoff, Daniel; Cornish, Peter; Lockeretz, Willie und Willer, Helga, (Hrsg.) (2005) Researching Sustainable Systems. Proceedings of the First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), Held in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the National Association for Sustainable Agriculture, Australia (NASAA), 21 – 23 September 2005, Adelaide Convention Centre, Adelaide, South Australia.. Research Institute of Organic Agriculture FiBL, CH-Frick, and International Society of Organic Agriculture Research (ISOFAR), c/o Institute of Organic Agriculture (IOL), DE-University of Bonn. https://orgprints.org/4013/
Distribution: Paper copies may be ordered from FiBL at a cost of 28 Euros plus mailing costs (see FiBL shop at http://www.fibl.org/shop); FiBL order number 1394. A PDF version is available free of charge for ISOFAR members via the member area of www.isofar.org.

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