Absoaption and availability of phosphorus for pigs based on dilution of radiophosphorus (32P)
The phosphorus metabolic function is extremely important for the animal's growth. The participation of P in the cost of rations is very high and this is one of the reasons to determine the exact amount needed in the rations to decrease the cost of formulation. This experiment was carried out aiming to measure the availability of P in a corn and soybean meal basal diet with and without supplementation o inorganic P. The technique used was the dilution of isotopes, and the P used was the sodium phosphate (Na2H 32PO4). The treatments with and without supplementary P presented respectively the following values: true absorption, 2.50 and 1.90 g; true availability, 45.86 and 48.22%; average daily gain, 0.513 and 0.450 kg; daily feed intake, 1.110 and 1.135 kg; and daily P consumption, 5.44 and 3.97 g. The P availability obtained for the bicalcium phosphate was 101.93% and the retention of the absorbed P was of 96.28% and 96.79% for the same treatments respectively. It was concluded that the P has been underestimated lo the formulation of diets based on com soybean meal, and the availability of P in the bicalcium phosphate was high.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
Pesquisa Agropecuaria Brasileira
2014
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| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/15421 |
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| Summary: | The phosphorus metabolic function is extremely important for the animal's growth. The participation of P in the cost of rations is very high and this is one of the reasons to determine the exact amount needed in the rations to decrease the cost of formulation. This experiment was carried out aiming to measure the availability of P in a corn and soybean meal basal diet with and without supplementation o inorganic P. The technique used was the dilution of isotopes, and the P used was the sodium phosphate (Na2H 32PO4). The treatments with and without supplementary P presented respectively the following values: true absorption, 2.50 and 1.90 g; true availability, 45.86 and 48.22%; average daily gain, 0.513 and 0.450 kg; daily feed intake, 1.110 and 1.135 kg; and daily P consumption, 5.44 and 3.97 g. The P availability obtained for the bicalcium phosphate was 101.93% and the retention of the absorbed P was of 96.28% and 96.79% for the same treatments respectively. It was concluded that the P has been underestimated lo the formulation of diets based on com soybean meal, and the availability of P in the bicalcium phosphate was high. |
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