02019naa a2200337 a 450000100080000000500110000800800410001902400290006010000180008924500910010726000090019852010440020765000180125165000180126965000200128765000120130765000450131965000160136465000130138065000250139365000200141865000220143870000240146070000210148470000210150570000240152670000170155070000250156770000170159277300720160921138692019-11-04       2019    bl uuuu     u00u1 u    #d7 a10.3382/japr/pfy0822DOI1 aFORNAZIER, R.  aA symbiotic improves performance and carcass yield of broilers.h[electronic resource]  c2019  aAbstract: In order to evaluate the effects of a symbiotic on 1?42-d-old broiler chicks, performance and carcass yield (CY), as well as litter concentrations of phosphorus and nitrogen were measured in a trial using 640 male chicks (Cobb 500). Birds were randomly distributed into 4 treatments with 8 replicates (pens) of 20 birds each. The treatments were different levels of the symbiotic (probiotic bacteria, exogenous enzymes, and autolyzed yeast) in the diets: 0.0, 0.5, 1.0, and 1.5 kg/t, and regression analysis using orthogonal polynomial contrasts was performed. As a challenge, it simulated conditions of commercial broilers sheds. The symbiotic provides beneficial effects for the animal?s performance, especially weight gain, which increased 4.3%, in the treatment with 1.5 kg/t inclusion compared with the diet without symbiotic. Inclusion of the symbiotic in the diets provided improvements in CY and breast yield. The data suggested that the tested symbiotic is a good tool for enhancing poultry performance through nutrition  aBreast muscle  aCarcass yield  aFeed conversion  aPoultry  aSaccharomyces cerevisiae var. cerevisiae  aWeight gain  aCarcaça  aConversão Alimentar  aFrango de Corte  aNutrição Animal1 aRIBEIRO JÚNIOR, V.1 aALBINO, L. F. T.1 aRODRIGUES, D. J.1 aTAVERNARI, F. de C.1 aSILVA, D. da1 aROSTAGNO, HORACIO S.1 aSERAFINI, S.  tJournal of Applied Poultry Researchgv. 28, n. 2, p. 383?389, 2019.