Data/hora: 13/06/2024 02:40:34

Provedor de dados: 	63	
País: 	Brazil	
Título: 	PHOSPHORUS METABOLISM AND ESTIMATION OF PHOSPHORUS REQUIREMENTS FOR SHEEP	
Autores: 	LOUVANDINI,H; VITTI,D.M.S.S.	
Data: 	1996-01-01	
Ano: 	1996	
Palavras-chave: 	Phosphorus; Sheep; Nutrition.	
Resumo: 	The main objective of the present work was to determine the effects of different dietary phosphorus (P) levels on endogenous faecal loss and to estimate the minimum daily requirement of P for sheep. The study was conducted with 24 Suffolk sheep which received a basic diet consisting of hay-concentrate mixture. The treatments consisted of different amounts of bone meal, added to the basic diet, so as to obtain supplementary P levels of 0, 1, 2 and 3g/day. Twenty-one days after the introduction of the experimental diet, 7.4 MBq radioactive P (32P) was injected into the left jugular vein of each sheep and blood, faeces and urine samples were collected daily for 8 days at 24-hour intervals. The samples were analysed for inorganic P and for radioactive specific activities. Mean endogenous faecal losses of P were 19.00, 31.79, 39.35, and 38.06mg/kg live weight (LW) per day in sheep supplemented with 0, 1, 2, and 3g, respectively. A positive linear relationship was observed between endogenous faecal loss and consumed P, indicating that this loss was linked to dietary P. Total P excretion in the faeces, as well as P absorption, retention, urinary excretion and salivary secretion were also directly related to P intake, as part of the mechanism of homeostatic control of organism animal. The minimum endogenous faecal loss for zero P intake, calculated by interpolation, was 8.27mg/kg LW per day, and for zero balance, the calculated phosphorus consumption was 21.36mg/kg LW per day.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000100027	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90161996000100027	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.53 n.1 1996	
Fonte: 	info:eu-repo/semantics/openAccess