Abstract
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Data from experiments with growing pigs of Danish Landrace (n=782) including measurements of nitrogen and energy balances were scrutinized in order to select observations in which maximum protein retention (RP) were expected.
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The enterions for selection were based on intake of metabolizable energy and oxidation of nutrients and a total of 152 measurements in the live weight (LW) range from 2 to 120 kg complied with the criterions.
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The selected material were used in a quadratic function of RP on metabolic weight (kg0.75) to describe the curve for maximum RP.
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The function obtained was: RP, g/d = 11.55 x kg0.75 ‐ 0.185 x kg150 with a maximum of 180 g/d at 98 kg LW.
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The RP‐values were compared with data from the literature with other races and the function seems well established to describe maximum protein retention in non‐hormone treated or specific selected pigs.