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Reevaluation of the digestible lysine requirement for broilers based on genetic potential Scientia Agricola
Dorigam,Juliano Cesar De Paula; Sakomura,Nilva Kazue; Hauschild,Luciano; Silva,Edney Pereira da; Bendezu,Hilda Cristina Palma; Fernandes,João Batista Kochenborger.
Broiler strains available in the poultry industry present different requirements for dietary lysine due to their different growth potentials as a result of their genetic makeup. This study aimed to determine the model parameters for maximum nitrogen retention (NRmaxT), the nitrogen maintenance requirement (NMR) and the efficiency of lysine utilization (bc-1) to reevaluate the lysine (Lys) requirements of male and female broilers. Nitrogen balance trials were performed during three periods (I: 6-21 days, II: 22-37 days, and III: 38-53 days). Seven treatments were used for males and females; the treatments consisted of seven diets with protein levels ranging from 61 to 364 g kg-1 dry matter, with Lys being limiting in the dietary nitrogen (4.91 g of Lys in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acid; Exponential model; Maintenance; Nitrogen retention; Performance.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000300004
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Ryegrass (Lolium multiflorum) BRS Ponteio and wheat (Triticum aestivum) BRS Tarumã pasture with different doses of ammonium sulfate as topdressing Animal Sciences
Timm, Luiz Carlos; Haygert-Velho, Ione Maria Pereira; Bolke, Delvacir Rezende; Antunes, Gustavo Veiverberg; Alessio, Dileta Regina Moro; Velho, João Pedro.
This study analyzed the behavior of the annual ryegrass (Lolium multiflorum) BRS Ponteio and dual-purpose wheat (Triticum aestivum) BRS Tarumã with different doses of ammonium sulfate as topdressing and evaluated the exponential growth model to explain the physiological development of both species. For each species, a completely randomized design was used with four replications per treatment with 9m2 area, in which the following treatments were distributed: 0, 150, 250, 350 and 450 kg nitrogen per hectare applied as ammonium sulfate. The cumulative and adjusted productions to the exponential growth model at the end of the cycle were, respectively: BRS Ponteio 150 = 5,620; 250 = 5,920; 350 = 7,585 and 450 = 8,491 and BRS Tarumã 150 = 3,922; 250 = 5,060; 350...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias; Zootecnia; Pastagem e Forragicultura degree-days; Lolium multiflorum; Dry matter; Exponential model; Nitrogen; Triticum aestivum..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/44026
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