Níveis de energia metabolizável em rações formuladas com base no conceito de proteína ideal e suplementadas com fitase para leitões dos 15 aos 35 kg

摘要: A total of 84 barrows and females from a commercial hybrid (Agroceres × MS60), averaging 15.3 kg, was raised 15 to 35 kg evaluate the effect different dietary levels metabolizable energy (ME) crude protein (CP) formulated according ideal concept phytase supplementation on performance carcass characteristics. The experiment analyzed as complete randomized block design, in factorial arrangement treatments 3 2 + 1, with three ME (3,080, 3,230, 3,380 kcal/kg), two CP (14% 16%), supplemented synthetic amino acids 1000 FTU/kg phytase, calcium level reduced by 25% phosphorus 30%. Additional control treatment 18% without attend nutrient requirements pigs Brazilian Feedstuffs Tables recommendations. Therefore, seven treatments, six replications animals per experimental unit were used. No daily weight gain, feed conversion, intake organs (absolute relative) observed.Feed higher fat deposition rate, lower fed diet kcal ME/kg. Decreasing nitrogen intake, increasing efficiency utilization for gain blood urea content observed 14% diets compared those 18%. reduction ME, CP, available 3,080 kcal/kg, 14%, 0.54% 0.28%, respectively, rations pigs, based do not affect kg.