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Master's Dissertation
DOI
10.11606/D.10.2016.tde-10102016-144525
Document
Author
Full name
Tatiana Mendes Oliveira
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Pirassununga, 2004
Supervisor
Committee
Lima, Felix Ribeiro de (President)
Albuquerque, Ricardo de
Menten, José Fernando Machado
Title in Portuguese
Determinação da biodisponibilidade relativa de fósforo para frangos de corte em milho, cevada e farelo de soja sem e com a adição de fitase microbiana à dieta
Keywords in Portuguese
Biodisponibilidade
Cevada
Farelo de soja
Frangos
Milho
Abstract in Portuguese
Foram utilizados 504 pintos de corte, machos, da linhagem Cobb, de 1 dia de idade, distribuídos aleatoriamente em 18 tratamentos com 4 repetições pelo período de 21 dias, para determinar a biodisponibilidade relativa do fósforo (BRP) em milho, cevada e farelo de soja sem e com a adição de fitase microbiana à dieta. Foram adicionados dois níveis de fitase (0 ou 750 FTU/kg de ração) e dois níveis de fósforo suplementar (0,05 ou 0,10%) à dieta basal semi-purificada com baixo nível de fósforo total (0,40%) sendo a fonte padrão de fósforo o fosfato bicálcico. Ao término do experimento, foram removidas as tíbias esquerdas e os dedos médios direitos para posterior análise de cinzas ósseas. A BRP para cada fonte orgânica foi calculada pelo método do slope ratio através da regressão dos valores de peso de cinzas na tíbia em função dos níveis de fósforo suplementar ingerido (mg/dia). Os valores de BRP para milho, cevada e farelo de soja sem a adição de fitase foram 55,4; 122,4 e 70,4%, respectivamente. Com a adição de fitase estes valores foram para 170,1; 153,6 e 156,40%, respectivamente
Title in English
Relative bioavailability of phosphorus in corn, barley and soybean meal with and without phytase in the diet
Keywords in English
Barley
Bioavailability
Corn
Poultry
Soybean meal
Abstract in English
Five hundred and four male Cobb chicks were used in a 21 days trial to determine the relative bioavailability of phosphorus (RBP) in corn, barley and soybean meal, with and without addition of microbial phytase (0 or 750 FYT/kg of diet) and two levels of suplemmentary phosphorus (0.05 ou 0.10%). Suplemmentary phosphorus and microbial phytase were added to the basal diet, which had been semi-purified and had had low levels of total phosphorus (0.40%), being dicalcium phosphate the pattern source of phosphorus. Animals were randomly assigned into 18 treatments with four repetitions each one. By the end of the experiment, animals left tibiae and right medium fingers were removed for later ashes analysis. A RBP for each organic phosphorus source was calculated by the slope ratio method, through regression analysis of tibiae ashes weight data in function of ingested levels of suplemmentary phosphorus (mg/day) data. The values of RBP for corn, barley and soybean meal without phytase were 55.4, 122.4 and 70.4%, respectively. However, the RBP values for corn, barley and soybean meal with phytase were 170.1, 153.6 and 156.40%, respectively
 
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Publishing Date
2016-11-07
 
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