Abstract
The experiment was carried with the objective of evaluating the productive performance, carcass yield, phosphorus availability and tibia ash in broilers subjected to diets containing increasing amounts of whole rice bran (WRB), supplemented with phytase. Six hundred broilers (Ross), all males, were allocated in boxes according to a completely randomized design, being fed the following regimens: T1) standard feed (corn and soybean meal); T2 standard feed with 750 FTU g -1 ; T3) feed with 3.5% of WRB with 750 FTU g -1 ; T4) feed with 7.5% of WRB with 750 FTU g -1 T5) feed with 10.5% WRB with 750 FTU g -1 and T6) feed with 14% WRB with 750 FTU g -1 . The inclusion of phytase with the use of WRB to the level of 14% and the reduction of the inorganic P in the formulation of the feed did not affect the performance and carcass characteristics of the broiler chickens; however, it did decrease the presence of phosphorus and ash in the tibia.
Highlights
A alimentação, segundo vários autores, é um dos fatores mais relevantes da produção de frangos de corte, ocupando aproximadamente dois terços do custo final desta atividade
T1-ração referencia, T2-ração referência com enzima, T3-ração com 3,5% de farelo de arroz integral (FAI) mais enzima, T4-ração com 7,0% de FAI mais enzima, T5-ração com 10,5% de FAI mais enzima, T6-ração com 14,0% de FAI mais enzima (T1) reference ration; T2) reference ration with 750 FTU g-1; T3) ration with 3.5% of RBW with 750FTU g-1; T4) ration with 7.5% of RBW with 750 FTU g-1 T5) ration with 10.5% RBW with 750 FTU g-1 and T6) ration with 14% RBW with
T1-ração referencia, T2-ração referência com enzima, T3-ração com 3,5% de FAI mais enzima, T4-ração com 7,0% de FAI mais enzima, T5-ração com 10,5% de FAI mais enzima, T6-ração com 14,0% de FAI mais enzima (T1) reference ration; T2) reference ration with 750 FTU g-1; T3) ration with 3.5% of RBW with 750 FTU g-1; T4) ration with 7.5% of RBW with 750 FTU g-1 T5) ration with 10.5% RBW with 750 FTU g-1 and T6) ration with 14% RBW with
Summary
O experimento foi conduzido no Setor de Avicultura da Escola Agrotécnica Federal de Iguatu, localizada no município de Iguatu, região centro-sul. Foram utilizados 600 frangos de corte, machos, da linhagem Ross, aos 14 dias de idade com peso médio de 435,50 g distribuídos em seis tratamentos e cinco repetições com 20 animais por parcela (30 boxes). Os animais foram alojados em galpão de alvenaria, com piso de concreto e telhas de barro construído na orientação leste-oeste. Os 30 boxes foram construídos na parte central do galpão, medindo 3,00 m2 (1,22 x 2,50 m) cada
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