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dc.contributor.authorSoares, Leticia [UNESP]
dc.contributor.authorSakomura, Nilva Kazue [UNESP]
dc.contributor.authorDorigam, Juliano Cesar de Paula
dc.contributor.authorLiebert, Frank
dc.contributor.authorSunder, Angela
dc.contributor.authorNascimento, Mariana Quintino do [UNESP]
dc.contributor.authorLeme, Bruno Balbino [UNESP]
dc.identifier.citationJournal Of Animal Physiology And Animal Nutrition. Hoboken: Wiley, v. 103, n. 1, p. 170-181, 2019.
dc.description.abstractA total of 56 Hy-line W-36 hens from 28 to 30 weeks were used on nitrogen balance (NB) trial to estimate daily N maintenance requirements (NMR) and the genetic potential for daily N retention (NRmaxT). The treatments consisted of six graded levels of nitrogen in the diets (N1 = 8; N2 = 16; N3 = 24; N4 = 32; N5 = 40; and N6 = 48 g N/kg of feed), formulated using the dilution technique. The regression analyses between nitrogen intake and excretion were performed to fit the exponential function and to determine the NMR = 292 mg/BWkg0.67, which was applied for further calculation of NRmaxT = 1,883 mg/BWkg0.67. A second NB trial was conducted, and a total of 96 Hy-line W-36 hens were used in the same period to estimate the ideal amino acid ratio (IAAR). Twelve treatments with eight replicates and one bird per cage were used. A balanced diet (BD) was formulated to meet the IAAR and the requirement of other nutrients for pullets. The limiting diets were formulated diluting BD with cornstarch and refilled with synthetic AAs and other feed ingredients, except for the AA under study. In each trial, the data of nitrogen intake, excretion, deposition and retention were obtained in a NB trial. The IAAR determined by Goettingen approach was Lys 100, Met+Cys 88, Trp 21, Thr 69, Arg 109, Val 90, Ile 75, Leu 127, Phe+Tir 110, Gly+Ser 73 and His 29%. The IAAR determined by Louvain approach was Lys 100, Met+Cys 88, Trp 21, Thr 69, Arg 104, Val 91, Ile 78, Leu 121, Phe+Tir 119, Gly+Ser 77 and His 29%.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.relation.ispartofJournal Of Animal Physiology And Animal Nutrition
dc.sourceWeb of Science
dc.titleOptimal in-feed amino acid ratio for laying hens based on deletion methoden
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionEvonik Ind
dc.contributor.institutionUniv Gottingen
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Anim Sci, Sao Paulo, Brazil
dc.description.affiliationEvonik Ind, Dept Anim Nutr Res, Hanau, Germany
dc.description.affiliationUniv Gottingen, Anim Nutr, Gottingen, Germany
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Anim Sci, Sao Paulo, Brazil
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdFAPESP: 2013/25761-4
dc.description.sponsorshipIdFAPESP: 2016/00536-6
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