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dc.creatorNagata, Adriano Kaneo-
dc.creatorRodrigues, Paulo Borges-
dc.creatorAlvarenga, Renata Ribeiro-
dc.creatorZangeronimo, Márcio Gilberto-
dc.creatorRodrigues, Kênia Ferreira-
dc.creatorLima, Gustavo Freire Resende-
dc.date.accessioned2020-08-27T00:30:32Z-
dc.date.available2020-08-27T00:30:32Z-
dc.date.issued2011-08-
dc.identifier.citationNAGATA, A. K. et al. Energy and protein levels in diets containing phytase for broilers from 22 to 42 days of age: performance and nutrient excretion. Revista Brasileira de Zootecnia, Viçosa, MG, v. 40, n. 8, p. 1718-1724, Aug. 2011. DOI: 10.1590/S1516-35982011000800014.pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/42661-
dc.description.abstractThis study was conducted in order to evaluate the influence of different levels of metabolizable energy and crude protein in diets formulated according to the ideal protein concept with phytase supplementation on performance and nutrient excretion of broilers from 22 to 42 days age. It was used 1,500 Coob lineage broilers at 22 days of age and with initial weight of 833 ± 7g, distributed in completely randomized design in a 3 × 3 + 1 factorial scheme composed of three levels of correct apparent metabolizable energy (2,950; 3,100 and 3,250 kcal/kg), three levels of crude protein (14, 16 and 18%) and a control treatment, totaling ten treatments with six repetitions of 25 birds each. All diets, with the exception of the control, were supplemented with phytase. For determination of excretion of pollutants, it was used 180 broilers from the same lineage at 35 days of age,placed in metabolic cages, with ten treatments each one with six repetitions and three birds per experimental unit. The protein and energy levels in diets containing phytase influenced feed intake, weight gain, feed conversion and excretion of nitrogen, phosphorus, calcium, potassium, copper and zinc by the birds. The corrected apparent metabolizable energy level in the diets for broilers in the studied period must be increased up to 3,250 kcal/kg of metabolizable energy and the levels of crude protein, calcium and phosphorus must be reduced down to 18, 0.70 and 0.31%, respectively, provided that supplemented with amino acids and phytase to improve the performance and to reduce excretion of pollutants by birds.pt_BR
dc.languageen_USpt_BR
dc.publisherSociedade Brasileira de Zootecnia (SBZ)pt_BR
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rightsacesso abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.sourceRevista Brasileira de Zootecnia (RBZ)pt_BR
dc.subjectAdditivespt_BR
dc.subjectAvailable phosphoruspt_BR
dc.subjectEnzymept_BR
dc.subjectIdeal proteinpt_BR
dc.subjectMetabolizable energypt_BR
dc.subjectPollutantspt_BR
dc.titleEnergy and protein levels in diets containing phytase for broilers from 22 to 42 days of age: performance and nutrient excretionpt_BR
dc.typeArtigopt_BR
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