Abstract

In growing barrows (live weight 17-30 kg) 3 g P/kg DM feed resulted in comparison to 6 g P/kg DM in 8% lower live weight gain. The lower live weight gain had no relation to N- and energy retention. The lower P feeding has only low effect on energy excretion in faeces and urine (1% of gross energy). A submarginal P feeding has no influence on N- and energy metabolism of growing pigs.

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