6746 1 archive 4062 disk0/00/00/67/46 2006-01-16 2009-08-20 14:29:32 2009-08-20 14:29:32 conference_item show 0 Causes of variation in productivity, mortality rate and cannibalism rate in different huosing systems revealed a strong effect of genotype and in brown birds differences may occur between beak-trimmed and intact hens. Diet x genotype interactions seem preferably to influence health criteria, whereas genotypes tend to react similar what concerns production characteristics. The content of insoluble fibre in the diet may influence feather-pecking behaviour, and oats has been shown to decrease the risk of feather-pecking whereas wheat had the opposite effect. Genotypes were found to behave significant differently to variations in the diet’s methionine content, and methionine supplementation preferably improved health criteria and less production in number of eggs. sv se_slu_animal_nutrition se se-slf se_slu_animal_breeding se-formas se-sjv 22-23 november 2005 Att navigera i en ny tid Ultuna, Uppsala, Sweden never 0 Nutrition of organic layers - do we need other genotypes? http://www.cul.slu.se/information/publik /konfrapport2005.pdf TRUE paper Elwinger Klas pub 9poultry 3animal 7animalhealth 5animalbreed 3feeding organic egg production, methionine, feedstuffs, protein, hybrids, requirements Orsaker till skillnader i produktion och beteenden i olika inhysningsformer för värphöns har till stor del en genetisk bakgrund. Generellt är bruna genotyper som ej näbbtrimmas mer benägna till fjäderplockning och hackning än vita leghornkorsningar. Olika genotyper visade sig från produktionssynpunkt reagera lika på förändringar i fodersammansättning, men olika från djurhälso- och beteendesynpunkt. Med de näringsmässigt strängare KRAV-regler som förespeglas träda i kraft 2001 krävs från djurskyddssynpunkt sannolikt andra genotyper, men kraven riskerar att bli högre ställda än vad som är biologiskt möjligt att uppfylla. 2005 published Ekologiskt lantbruk konferens 22-23 november 2005. Ultuna, Uppsala. Sammanfattningar av föredrag och postrar. SLU. Centrum för uthålligt lantbruk. Federativ tryckeri AB Referenser Abrahamsson P., Tauson R. and Elwinger K. (1996) Effects on production, health and egg quality of varying proportions of wheat and barley in diets for two hybrids of laying hens kept in different housing systems. Acta Agric Scand Sect A, Animal Sci 46: 173-182. Aerni V., Brinkhof M.W.G., Wechsler B., Oester H. and Frohlich E. (2005) Productivity and mortality of laying hens in aviaries: a systematic review. Worlds Poult Sci J 61, 130-142. Det danske fjerkraeraad. (2005). Beretning 2005. Det danske fjerkraeraad. Trommesalen 5, 1614 Copenhagen V. Damme K. (2004) Erfolg versprechende Ansätze bei einigen Merkmalen. Die Geflügelwirtschaft und Schweineproduktion 2004:1, 19-26. Eurobusiness. (2005) http://www.eurobusiness.se/eggsweden/invagningtab-eggsweden.htm, 2005-10-10. Lüke M, Simon I. and Poteracki P. (2004) Haltungssysteme wurden erneut verglichen. Die Geflügelwirtschaft und Schweineproduktion 32: 11-17 Tauson R. (2005) Management and housing systems for layers. Worlds Poult Sci J 61: 477-490. NOSB. (2001). Methionine Livestock. Technical Advisory Panel Review for the USDA National Organic Program. May 21, 2001, 20 pp. Oden K., Keeling L.J. and Algers B. (2002) Behaviour of laying hens in two types of aviary systems on 25 commercial farms in Sweden. Br Poult Sci 43: 169-181. Wahlstrom A. (1999) Further results, in Diet x hybrid interactions in large groups of laying hens. Dissertation. Agraria. Report 184. SLU, Uppsala. pp 42. (weblink) Wahlstrom A., Elwinger K. and Thomke S. (1999a) Total tract and ileal nutrient digestibility of a diet fed as mash or crumbled pellets to two laying hybrids. Anim Feed Sci Technol 77: 229-239. Wahlström A., Tauson R. and Elwinger K. (1998a) Effects on production performance and egg quality when feeding different oats/wheat ratios to two hybrids of laying hens kept in aviaries. Acta Agric Scand Sect A, Animal Sci 48: 243-249. Wahlstrom A., Tauson R. and Elwinger K. (1998b) Effects on plumage condition, health and mortality of dietary oats/wheat ratios to three hybrids of laying hens in different housing systems. Acta Agric Scand Sect A, Animal Sci 48: 250-259. Wahlstrom A., Tauson R. and Elwinger K. (1999b) Production and egg quality as influenced by mash or crumbled diets fed to laying hens in an aviary system. Poult Sci 78: 1675-1680. Wahlstrom A., Tauson R. and Elwinger K. (2001) Plumage condition and health of aviary-kept hens fed mash or crumbled pellets. Poult Sci 80: 266-271. Willer, H. and Yussefi, M. (Eds.) (2004) The World of Organic Agriculture - Statistics and Emerging Trends 2004. International Federation of Organic Agriculture Movements, DE-53117 Bonn, 2004. http://orgprints.org/2555/, 2005-04-28 Windhorst, H.,W. (2004) Development of organic egg production and marketing in the EU. World’s Poultry Science Conference, Istanbul, June 8-13, 2004. http://www.ispa.uni-vechta.de/staff/windhorst/lectures/wpc2004paper.doc, 2005-04-28 public 123-128 5283 1 6746 1 application/pdf en public

elwinger123_1281.pdf

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