creators_name: Hansen, Sissel
creators_name: Bakken, Anne Kjersti
editors_name: Neuhoff, Daniel
type: conference_item
datestamp: 2008-10-07
lastmod: 2009-08-20 14:37:45
metadata_visibility: show
title: A discussion of norms for S supply in organic farming based on content in forage and ruminant performance in Norway
ispublished: pub
subjects: 4nutrient
subjects: 1pasture
subjects: 3feeding
full_text_status: public
keywords: forage, dairy cattle, deficiency, grassland, ruminant, sheep, mineralsip
abstract: 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.
date: 2008
date_type: published
publication:  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
volume: II
publisher: ISOFAR
pagerange: 160-163
refereed: yes
referencetext: ARC, 1980. The nutrient requirement of ruminant livestock. Commonwealth Agricultural Bureaux, Farnham Royal, UK, pp. 166-168.
Berry, P. M., Sylvester-Bradley, R., Philipps, L., Hatch, D. J., Cuttle, S. P., Rayns, F. W. & Gosling, P. 2002. Is the productivity of organic farms restricted by the supply of available nitrogen? Soil Use and Management 18, 248-255.
Bleken, M. A., Steinshamn, H, Hansen, S. (2005): High nitrogen costs of dairy production in Europe: Worsened by intensification. Ambio 34, 598-606.
Govasmark, E., Steen, A., Bakken, A. K., Strøm, T., & Hansen, S. (2005): Factors affecting the concentration of Zn, Fe and Mn in herbage from organic farms and in relation to dietary requirements of ruminants. Acta Agriculturæ Scandinavica Section B, Soil and Plant Science 55. 2, 131-142.
Hopper, J. L. and D. R. Parker. (1999): Plant availability of selenite and selenate as influenced by the competing ions phosphate and sulphate. Plant and Soil 210.2, 199-207.
Ivancic, J. and W. P. Weiss. (2001): Effect of dietary sulphur and selenium concentrations on selenium balance of lactating Holstein cows. Journal of Dairy Science 84.1, 225-32.
Olesen, J. E., Schelde,K., Weiske,A., Weisbjerg,M.R., Asman,W.A.H., Djurhuus,J. (2006): Modelling greenhouse gas emissions from European conventional and organic dairy farms. Agric. Ecosys. Environ. 112, 207-220.
National Research Council. (2001). Nutrient requirements of dairy cattle. 1 pp.
Qi, K., Lu, C. D. & Owens, F. N. (1992): Sulfate supplementation of alpine goats – effects on milk yield and composition, metabolites, nutrient digestibilities, and acid-base balance. Journal of Animal Science 70, 3541-3550.
Underwood, E. J., Suttle, N.S. (1999): The Mineral Nutrition of Livestock. 3 ed. New York: CABI Publishing, 614 pp. 

citation: 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. 2nd scientific conference of the international society of organic agriculture research (ISOFAR), Cultivating the future based on science,, Modena, Italy, June 16-20, 2008. 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.
document_url: http://orgprints.org/11946/1/11946.pdf