Nutrient absorption in lambs fed diets containing different amounts of phosphorus
| Autor: | M. E. A. Nasser, José António C. Moreira, José Cleto da Silva Filho, T. S. Silva, René Patiño P, Dorinha Smith Vitti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Absorption (pharmacology)
chemistry.chemical_element Forage Aquatic Science Absorption Animal science calcium phosphorus radioisotopes ruminants (Source: DeCS) Organic matter Dry matter Feces chemistry.chemical_classification lcsh:Veterinary medicine General Veterinary Phosphorus ruminants (Source DeCS) chemistry Biochemistry ruminants Nutrient absorption lcsh:SF600-1100 Animal Science and Zoology Nutrition physiology |
| Zdroj: | Revista MVZ Cordoba, Vol 18, Iss 2, Pp 3444-3451 (2013) Revista MVZ Cordoba, Vol 18, Iss 2 (2013) Journal MVZ Cordoba; Revista MVZ Córdoba Volumen 18(2) Mayo-Agosto 2013; 3444-3451 Revista MVZ Córdoba; Revista MVZ Córdoba Volumen 18(2) Mayo-Agosto 2013; 3444-3451 Journal MVZ Cordoba; Vol 18 No 2 (2013): Revista MVZ Córdoba Volumen 18(2) Mayo-Agosto 2013; 3444-3451 Revista MVZ Córdoba; Vol. 18 Núm. 2 (2013): Revista MVZ Córdoba Volumen 18(2) Mayo-Agosto 2013; 3444-3451 |
| ISSN: | 1909-0544 0122-0268 |
| Popis: | Objective. Evaluate the effect of increasing P intake on nutrient digestibility, and compare the true and apparent absorption coefficients of P and Ca in lambs. Materials and methods. Twenty-four Santa Ines sheep, with an average weight of 33.6 ± 1.6 kg, were distributed into four treatments (0, 2, 4 and 6 g/day of supplementary P) with forage: concentrate ratio of 70:30. The study of apparent nutrient digestibility was conducted during the first week, using the total feces collection method. During the second week, after injection of 7.4 MBq of 32P and 7.7 MBq of 45Ca, apparent (AAC) and true (TAC) absorption coefficients of P and Ca were determined. The lambs were kept in metabolic cages. Results. The increase in P intake did not affect (p>0.05) dry matter, crude protein, NDF or ADF digestibility, but the TAC of P and Ca and mineral matter digestibility decreased. The AAC was not affected (p=0.10). A cubic relationship was observed between P intake and TAC (TAC=2.16–1.95X+0.55X2-0.04X3; R2=0.38) and linear relationship with the TAC of Ca (TAC=0.559–0.03X; R2=0.26). TAC and AAC values were different (p |
| Databáze: | OpenAIRE |
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