Effect of phytase suplementation on the performance and ileal digestibility of nutrients

Revista Brasileira de Zootecnia

Rostagno, Horacio Santiago¹  Vieites, Flávio Medeiros¹  Tejedor, Anel Atencio¹  Albino, Luiz Fernando Teixeira¹ 

[1] Universidade Federal de Viçosa, Viçosa

关键词: enzyme;    phytase;    corn-soyben meal;    broilers chicks;    nutrient digestibility   IntroduçãoNo Brasil;    aproximadamente 90% das dietas para aves são compostas de ingredientes de origem vegetal (milho e farelo de soja);    sendo que a maior parte do fósforo presente nestes ingredientes se encontra na forma de ácido fítico;    o qual é indisponível para aves;   

DOI  :  10.1590/S1516-35982001000300027

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- One experiment was conducted to evaluate the effect of microbial enzymes, phytase, on the performance of the birds and on the digestibility coefficient of dry mater (DM), crude protein (CP), phosphorus (P) and calcium (Ca) and the values of apparent ileal digestible of energy (AIDe) and nitrogen corrected apparent metabolizable energy (AMEn). A total of 384 Avian Farm male broiler chicks, 10 days old, during 14 d-trial were used in a factorial arrangement of 2 x 3, with eight replicates, eight chicks per unit were used. The diets were formulated to contain two levels of Ca and available P normal (0.93%Ca/0.45%Pd) and low (0.80%Ca/0.33%Pd) x three level of phytase (o - control, 500 FTU phytase - 1 and 750 phytase 2). Chromic oxide (0,5%) was added to the diets, as an indigestible marker, to estimate ileal digestibility. Phytase 1 improve weight gain in 3.4% and phytase 2 in 2.8%. Both enzymes improved feed:gain ratio in 3% and the digestibility of CP, E, P and Ca. Phytase addition, also, improved AIDe, however the enzyme did not improve the EMAn.

【 授权许可】

CC BY-NC