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Investigations on phosphorus supply of growing pigs between 11 and 38 kg live weight 2. retention of calcium phosphorus and ash in the skeleton and soft tissue of pigs fed on different rations without phosphorus or supplemented with two various feed grade phosphates



Investigations on phosphorus supply of growing pigs between 11 and 38 kg live weight 2. retention of calcium phosphorus and ash in the skeleton and soft tissue of pigs fed on different rations without phosphorus or supplemented with two various feed grade phosphates



Archives of Animal Nutrition 40(11-12): 1085-1096



The influence of phosphorus (P) supply on the content of ash, P and Ca of the skeleton and soft tissue was well on the P deposition in the empty body of pigs (.apprxeq.35 kg live weight) was studied in 3 individual feeding experiments with different diets (P-content 2,97; 2,41 or 3,7 g/kg diet). In each experiment 2 of the 3 groups (7 or 8 animals per group, initial weight .apprxeq. 11 kg) were supplemented with the feed grade phosphates "Rukana" or "Cefkaphos". In the experiments the supplemented amount of P as "Rukana" or "Cefkaphos" was 2.50; 2.33 or 0.5 g/kg od the diet. After intake of .apprxeq. 65 kg of the diet the animals were slaughtered. Homogenates of bones and soft tissues of the left half of the empty body were analysed for ash, P and Ca. Both of the feed grade phosphates increased these parameters in the skeleton and soft tissues as well the P deposition in the body to the same level. In the middle of the experiments the P deposition per kg live weight gain amounted to 4.6 g ("Rukana") and 4,4 g ("Cefkaphos").

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