PERFORMANCE AND CARCASS EVALUATION OF SWINE FED FINISHING RATION WITH PHYTASE ASSOCIATED WITH THE WITHDRAWAL OF MICROMINERAL-VITAMIN SUPPLEMENT AND THE REDUCTION OF INORGANIC PHOSPHORUS

• Autor(a) principal: Oliveira, Ana Paula Azara de
• Data de Publicação: 2010
• Outros Autores: Nunes, Romão da Cunha, Roner, Márcia Nunes Bandeira, Stringhini, José Henrique, Rufino, Luciana Moura, Farias, Leonardo Atta
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência animal brasileira (Online)
• Texto Completo: https://revistas.ufg.br/vet/article/view/4534
• topic: Animal production; Conversão alimentar; Enzima; Ganho de peso; Terminação

The experiment aimed to evaluate the effect of phytase enzyme in rations for swine at the finishing phase without the use of mineral-vitamin supplement and with reduced levels of inorganic phosphorus on performance and carcass characteristics, ashes and mineral percentage in the bones and economic viability. Twenty-four hybrid females with starter weight of 66 ± 1.4 kg and final weight of 106 ± 1.8 kg were housed for 38 days in 24 stalls and allotted in a completely randomized experimental design with six treatments and four replications of two animals each. The following treatments were used: T1 –­­ basal feed; T2 – basal feed without micromineral-vitamin supplement; T3 – basal feed with phytase and without micromineral-vitamin supplement; T4 – basal feed with phytase, without micromineral-vitamin supplement and without 1/3 of inorganic phosphorus; T5 – basal feed with phytase, without micromineral-vitamin supplement ans without 2/3 of inorganic phosphorus; and T6 – basal feed with phytase, without micromineral vitamin supplement and without inorganic phosphorus supplementation. The withdrawal of the micromineral-vitamin supplemet, the reduction of inorganic phosphorus level and the addition of phytase enzyme did not affect (P>0.05) the carcass characteristics, but they reduced (P<0.05) feed intake and weight gain, and showed worse feed conversion. Likewise, reduction of inorganic phosphorus levels and  phytase addition did not improve economic efficiency when compared to basal feed.KEYWORDS: Enzyme, finishing phase, pig, ration, weight gain.