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Der optimale Erntezeitpunkt für tanninhaltige Futterpflanzen

Häring, D.A.; Suter, D. and Lüscher, A. (2007) Der optimale Erntezeitpunkt für tanninhaltige Futterpflanzen. [The optimal time for harvesting tanniferous forage plants.] Paper at: Zwischen Tradition und Globalisierung - 9. Wissenschaftstagung Ökologischer Landbau, Universität Hohenheim, Stuttgart, Deutschland, 20.-23.03.2007.

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Summary

Depending on the concentration in which they are fed, condensed tannins (CT) can have various beneficial or detrimental effects on ruminants. In organic farming the anthelmintic effects of CT are of special interest. In an outdoor experiment, the sea-sonal dynamics of the CT concentration of the harvestable biomass was investigated as a function of the biomass allocation to leaves and stems in Onobrychis viciifolia, Lotus corniculatus and Cichorium intybus in the course of a vegetation period in Zu-rich, Switzerland. Such knowledge is indispensable for a practical application of tan-niferous plants in farming systems. In line with our expectations, CT concentrations were higher in leaves than in stems and the leaf fraction of the harvestable biomass decreased steeply with time in all investigated plant species. In contrast to our expec-tations, within 20 weeks from sowing, the concentration of CT in leaves approximately doubled in Lotus (from 2 to 5% of DM) and in Onobrychis (from 5 to 9% of DM) and was nearly stable in Cichorium (0.5% of DM). Over time, the effect of the declining proportion of leaves in the harvestable biomass was almost exactly neutralized by the increasing concentration of CT in leaves, resulting in close to constant CT concentra-tions in the harvestable biomass during the season. We conclude that among the investigated species, the tannin concentration in Onobrychis seems most promising for the application against gastro-intestinal nematodes. As the CT concentration of harvestable biomass was found to be constant during the season, an optimal time for harvest can be determined in relation to agronomic properties such as fodder quality and yield.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Entwicklung Ökolandbau, Pflanzenbau, Tierernährung
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Animal husbandry > Health and welfare
Animal husbandry > Feeding and growth
Research affiliation: International Conferences > 2007: Scientific Conference on Organic Agriculture > 2 Livestock > 2.3 Animal nutrition
International Conferences > 2007: Scientific Conference on Organic Agriculture > 1 Plant and Soil > 1.1 Crop production and soil tillage
Switzerland > Agroscope > ART - Reckenholz location
Deposited By: Lüscher, Dr. Andreas
ID Code:9277
Deposited On:18 May 2007
Last Modified:12 Apr 2010 07:34
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Die endgültige Version des Beitrags ist veröffentlicht in:
S. Zikeli, W. Claupein, S. Dabbert, B. Kaufmann, T. Müller und A. Valle Zárate, Hrsg. (2007)
Zwischen Tradition und Globalisierung – 9. Wissenschaftstagung Ökologischer Landbau, Universität Hohenheim, Deutschland, 20.-23. März 2007, http://orgprints.org/10742/

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