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Original Articles

A Critical View on the Conversion Factor 6.25 from Total Nitrogen to Protein

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Pages 299-304 | Received 17 Oct 1986, Published online: 07 Sep 2009

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Sigurd Boisen. (1998) A new protein evaluation system for pig feeds and its practical application. Acta Agriculturae Scandinavica, Section A — Animal Science 48:1, pages 1-11.
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S. Fujihara, H. Sasaki, Y. Aoyagi & T. Sugahara. (2008) Nitrogen-to-Protein Conversion Factors for Some Cereal Products in Japan. Journal of Food Science 73:3, pages C204-C209.
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C. Lanzas, C.J. Sniffen, S. Seo, L.O. Tedeschi & D.G. Fox. (2007) A revised CNCPS feed carbohydrate fractionation scheme for formulating rations for ruminants. Animal Feed Science and Technology 136:3-4, pages 167-190.
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O. Hernandez-Mendo & J. D. Leaver. (2006) Production and behavioural responses of high- and low-yielding dairy cows to different periods of access to grazing or to a maize silage and soyabean meal diet fed indoors. Grass and Forage Science 61:4, pages 335-346.
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M. Habib, J.S. Syed & J.D. Leaver. (2007) Choice of grass or maize silages by lactating dairy cows: influence of supplementary protein, concentrate level and milk yield. Animal Science 82:4, pages 469-477.
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O. Hernandez-Mendo & J. D. Leaver. (2004) Effect of replacing time available for grazing with time available for eating maize silage and soyabean meal on milk yield and feeding behaviour in dairy cows. Grass and Forage Science 59:4, pages 318-330.
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P Jean dit Bailleul, J Rivest, F Dubeau & C Pomar. (2001) Reducing nitrogen excretion in pigs by modifying the traditional least-cost formulation algorithm. Livestock Production Science 72:3, pages 199-211.
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Peter Weppen. (2001) Process calorimetry on composting of municipal organic wastes. Biomass and Bioenergy 21:4, pages 289-299.
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Richard K Hughes, Neil Desforges, Christopher Selwood, Roger Smith, Charles I Speirs, Georges Sinnaeve, Peter G Gorton, Julian Wiseman, Kornelia Jumel, Stephen E Harding, Sandra E Hill, Val Street, Trevor L Wang & Cliff L Hedley. (2001) Genes affecting starch biosynthesis exert pleiotropic effects on the protein content and composition of pea seeds. Journal of the Science of Food and Agriculture 81:9, pages 877-882.
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L.C. Gonçalves, N.M. Rodriguez, F.S. Nogueira, A.L.C.C. Borges & C.P. Zago. (1999) Silagem de sorgo de porte baixo com diferentes teores de tanino e de umidade no colmo. III- Quebra de compostos nitrogenados. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 51:6, pages 571-576.
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Pirjo P. Salo-väänänen & Pekka E. Koivistoinen. (1996) Determination of protein in foods: comparison of net protein and crude protein (N × 6.25) values. Food Chemistry 57:1, pages 27-31.
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