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Chelated Minerals and Limestone Particle Sizes on Performance and Bone Quality of Brown-Egg Layers Rev. Bras. Ciênc. Avic.
Cordeiro,CN; Bastos-Leite,SC; Vasconcelos,FC; Goulart,CC; Sousa,AM; Costa,AC.
ABSTRACT This study aimed to evaluate productive performance, egg quality, and bone quality of commercial brown-egg layers fed diets containing organic and inorganic minerals and three limestone particle sizes. A total of 288 birds at 64 weeks of age were distributed in a completely randomized design in a 2 × 3 factorial arrangement (two mineral sources and three limestone particle sizes) and eight replicates. The experiment lasted 112 days, divided into four periods. The following treatments were tested: T1 = inorganic minerals + 100% fine limestone; T2 = inorganic minerals + 50% fine limestone + 50% coarse limestone; T3 = inorganic minerals + 100% coarse limestone; T4 = inorganic + organic minerals + 100% fine limestone; T5 = inorganic + organic minerals...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Laying; Organic; Sources of calcium; Tibia.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000500035
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Phytase Superdosing in the Diet of Lightweight Replacement Pullets: Performance, Organ Biometry and Bone Characteristics Rev. Bras. Ciênc. Avic.
Sena,TL; Leite,SCB; Farias,MRS; Abreu,CG; Freitas,ER; Costa,AC.
ABSTRACT The aim of this study was to evaluate the effect of two types of phytases (the 1st produced from Escherichia coli and the 2nd from Aspergillus oryzae) with different dosages (300 and 900 Unit Phytase or FTU) on performance, organ biometry and bone quality of replacement pullets in the period of 8 to 17 weeks of age. A total of 288 Hy-Line White laying hens were used at 8 weeks of age. A completely randomized design was adopted in a 2 x 2 factorial scheme, totaling 4 treatments with 8 replicates of 9 birds each. Performance, biometric variables and bone characteristics were evaluated. There was no significant interaction between the factors for any of the evaluated variables. The conversion and the accumulated consumption were influenced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Myo-inositol; Phytate; Phytic acid.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000400306
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