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Metabolisable energy studies with Turkeys: Nitrogen correction factor in metabolisable energy determinations |
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| Authors: | S Leeson K N Boorman D Lewis D H Shrimpton |
| Institution: | 1. Department of Applied Biochemistry and Nutrition , University of Nottingham School of Agriculture , Sutton Bonington, Oughborough, Leics, LE12 5RD, England;2. Department of Animal and Poultry Science , University of Guelph , Guelph, Ontario, Canada , N1G 2W1;3. Department of Applied Biochemistry and Nutrition , University of Nottingham School of Agriculture , Sutton Bonington, Oughborough, Leics, LE12 5RD, England;4. Unifeeds International Ltd , Chiltern House, 184 High Street, Berkhamstead, Herts, England |
| Abstract: | 1. Metabolisable energy (ME) values, uncorrected for nitrogen retention, for a Canadian rapeseed meal and an American wheat, determined by a regression method with turkey poults, were influenced by the protein content of the basal diet used. 2. Increased nitrogen retention offsets the effect of substituting rape‐seed meal into a low‐protein basal diet, providing a high estimate of ME. 3. The expected offsetting due to nitrogen retention of the effect of substituting wheat into a high‐protein basal diet was not observed but this was due to some unexpected trends in nitrogen retention. 4. Correction of ME values for nitrogen retention decreased differences due to disparities between the protein contents of the ingredients evaluated and the basal diet. |
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