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A discussion of norms for S supply in organic farming based on content in forage and ruminant performance in Norway

Hansen, Sissel and Bakken, Anne Kjersti (2008) A discussion of norms for S supply in organic farming based on content in forage and ruminant performance in Norway. In: Neuhoff, Daniel (Ed.) Proceedings of the 2nd scientific conference of the international society of organic agriculture research (ISOFAR), Livestock, socio-economic and cross disciplinary research in organic agriculture, ISOFAR, II, pp. 160-163.

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Summary

The content of sulphur (S) in grassland on 27 Norwegian organic farms with dairy or sheep production was investigated in 2001 and 2002. The forage content of S was below the norms (2 g S kg DM-1) for both plants and animals in a large proportion of the samples. The average S content in forage at dairy farms was 1.4 g S kg DM-1 and at sheep farms 1.5 g. Even on grasslands with low plant S content (<1 g S kg DM-1), S-fertilization did not increase yields and increased the plants’ S content only very slightly. No indications of S deficiency were observed on the dairy farms. For one sheep farm with a forage S content of 1.1 ± 0.1g S kg DM-1, brittle and short winter wool was reported.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:forage, dairy cattle, deficiency, grassland, ruminant, sheep, mineralsip
Subjects: Soil > Nutrient turnover
Crop husbandry > Production systems > Pasture and forage crops
Animal husbandry > Feeding and growth
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 3.3 Animal health and nutrition – ruminants
International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR
Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Organic Food and Farming Division
Deposited By: Hansen, Sissel
ID Code:11946
Deposited On:07 Oct 2008
Last Modified:12 Apr 2010 07:36
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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