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Regulation of clover content by choice of ryegrass variety or by mixing varieties in short rotation leys

Nilsdotter-Linde, Nilla and Bergkvist, Göran (2005) Regulation of clover content by choice of ryegrass variety or by mixing varieties in short rotation leys. Poster at: Researching Sustainable Systems - International Scientific Conference on Organic Agriculture, Adelaide, Australia, September 21-23, 2005. [Unpublished]

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Summary

The legume content in short rotation mixed leys is generally larger in organic production than in conventional, because application of mineral nitrogen favours grasses in competition with legumes. A large proportion of white clover in the diet of ruminants may cause problems with bloat. The purpose of this study was to test the effect of grass varieties or combinations of varieties on clover percentage and ley yield. Different varieties of perennial ryegrass (Lolium perenne L.) and Festulolium (Festulolium braunii Richt.) were compared in mixed swards with white clover (Trifolium repens L.) in a field experiment in east-central (Uppsala) and south-west Sweden (Rådde). The clover DM proportion of total yield was usually more than 50% at Rådde, but generally less than 50% at Uppsala. At Uppsala, an increase in grass yield resulted in a corresponding decrease in clover yield. At Rådde, grass performance affected total yield, but not clover yield. It was concluded that the clover content in short-rotation leys can be restricted by using competitive and persistent varieties of grass, but it could not be shown that grass mixtures are more competitive than their constituent components.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Organic farming, mixed swards, dry matter yield, legume content, white clover, competitiveness
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Research affiliation: International Conferences > 2005: 1st ISOFAR Conference > 2005: 1st ISOFAR Conference
Related Links:http://orgprints.org/4013/, http://www.isofar.org/adelaide2005, http://orgprints.org/view/projects/int-conf-isofar-2005.html
Deposited By: ISOFAR,
ID Code:4433
Deposited On:03 Nov 2005
Last Modified:12 Apr 2010 07:30
Document Language:English
Status:Unpublished
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. http://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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