Níveis dietéticos de lisina para frangos de corte de 1 a 21 e 22 a 40 dias de idade

Costa, Fernando Guilherme Perazzo; Rostagno, Horácio Santiago; Albino, Luiz Fernando Teixeira; Gomes, Paulo Cézar; Toledo, Rodrigo Santana

doi:10.1590/s1516-35982001000600016

Cited by 31 publications

(39 citation statements)

References 17 publications

(4 reference statements)

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“…In this study, however, the results were different from those obtained by Amarante Junior et al (2005), who suggested 1.03% digestible lysine for broilers from 22 to 42 days of age, and by Costa et al (2001), who indicated 1.044% digestible lysine for broiler chickens of the same strain from 22 to 40 days of age. As indicated in this study, the optimum level is about 20% higher than the suggested in the technical manual line used (Agroceres, 2004), which suggests 0.92% digestible lysine for the period of 29 days of age until slaughter.…”

Section: Resultscontrasting

confidence: 99%

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Dietary levels of lysine for male broilers from 23 to 36 days of age: performance and body composition

Neto¹,

Toledo²,

Takeara³

et al. 2011

R. Bras. Zootec.

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-One thousand and fifty (1,050) Ross male broilers from 23 to 36 days of age were used to evaluate the dietary effects of levels of lysine. It was used a random block design with 5 levels of digestible lysine (0.95; 1.00; 1.05; 1.10 and 1.15%). Each level was applied to seven replicates and the experimental unit was composed of 30 birds. Diets were offered in seven replicates and the experimental unit was represented by 30 birds. Weight gain, feed intake, feed conversion, carcass traits, cut yields, composition and deposition of body nutrients were evaluated. The concentration of 1.09% of digestible lysine optimized performance without significant effects on feed intake. Carcass traits and cut yields had no significant differences among levels of lysine. On the other hand, there was a quadratic effect on carcass weight, which was the best at the level of 1.07% of digestible lysine. On crude protein content of the empty body, the best response was observed at the level of 1.10% of dietary lysine. This same level corresponded to a quadratic response in the deposition of water from carcass and empty body. The level of digestible lysine for better performance, chemical composition and body nutrient deposition in broilers from 23 to 36 days of age is between 1.07 and 1.10%.

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Section: Resultscontrasting

confidence: 99%

“…The results obtained for carcass traits and yield cuts differ from those found by Costa et al (2001) in a similar study with broilers from the same lineage and age. These authors observed a linear increase in carcass and breast yield and a decreasing effect on abdominal fat in the extent to which increased the level of dietary lysine.…”

Section: Resultscontrasting

confidence: 99%

Dietary levels of lysine for male broilers from 23 to 36 days of age: performance and body composition

Neto¹,

Toledo²,

Takeara³

et al. 2011

R. Bras. Zootec.

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“…Isso ocorre porque esse aminoácido é utilizado prioritariamente na síntese protéica muscular, que ocorre principalmente na fase de crescimento do frango de corte (Friesen et al, 1996;Lawrence & Fowler, 1997 O nível de lisina digestível estimado (1,01%) foi similar aos sugeridos por Costa et al (2001), 1,044%, e Valério et al (2003), 1,022%, para frangos de corte em idades semelhantes. Então, pode-se afirmar que o nível proposto pelo NRC (1994) não atende às demandas das linhagens encontradas no mercado, uma vez que níveis mais elevados de lisina melhoraram o rendimento de carne de peito na fase de terminação (Moran Jr. & Bilgili, 1990;Mendes et al, 1997).…”

Section: Resultsunclassified

Níveis de lisina digestível para frangos de corte machos no período de 37 a 49 dias de idade

et al. 2009

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Digestible lysine levels for male broilers in the period from 37 to 49 days of age ABSTRACT -One thousand and fifteen commercial male broilers from 37 to 49 days of age were used to evaluate different digestible lysine levels. A completely randomized trial was used, with five treatments (0.90, 0.95, 1.00, 1.05 and 1.10% of digestible lysine, respectively), seven repetitions and 35 experimental units, with 29 birds each. Lysine levels were added in isoenergetic (3,250 kcal of ME/kg) and isoproteic (18% of CP) corn and soy meal rations. Weight gain, feed intake, feed:gain ratio, carcass characteristics and cuts, body composition and nutrient deposition were measured. Digestible lysine levels influenced the feed:gain ratio, with decreasing linear effect. Quadratic effect was observed due to lysine levels used on carcass characteristics, cuts and abdominal fat deposition. The variable chemical composition of the carcass, empty body and mineral matter showed quadratic effect on the digestible lysine levels. The digestible lysine levels had no effect on the chemical composition of blood and offal fractions. However, evidences of linear increase in the protein deposition of carcass and empty body due to the increase in the digestible lysine level were observed. Considering performance, the digestible lysine level should be 1.10% or higher.

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“…Diversos autores (Baker & Han, 1994;Rostagno et al, 1999;Costa et al, 2001;Ishibashi & Yonemochi, 2002;Borges et al, 2002) têm relatado que os níveis ótimos de aminoácidos em rações para frangos de corte podem variar em razão de fatores como linhagem, idade, sexo, níveis nutricionais, fontes de energia e proteína, desafios imunológicos, manejo e temperatura ambiente.…”

Section: Introductionunclassified

“…Em estudos nutricionais utilizando rações à base de milho e farelo de soja, a lisina tem sido considerada o segundo aminoácido limitante para o crescimento e desenvolvimento de frangos de corte (Kidd et al, 1997;Costa et al, 2001;Ishibashi & Yonemochi, 2002;Lana et al, 2005). Sabe-se também que a lisina é um aminoácido essencial cujo principal papel fisiológico é a síntese protéica (tecido muscular) e que está envolvida, em menores proporções, em outros processos metabólicos (Baker & Han, 1994;Costa et al, 2001;Amarante Jr. et al, 2005;Takeara et al, 2005;Lana et al, 2005).…”

Section: Introductionunclassified

Níveis de lisina digestível da ração e temperatura ambiente para frangos de corte em crescimento

Siqueira

Oliveira²,

Donzele³

et al. 2007

R. Bras. Zootec.

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RESUMO -Este estudo foi conduzido para avaliar os efeitos dos níveis de lisina digestível da ração e da temperatura ambiente sobre o desempenho e as características de ABSTRACT -This study was aimed to evaluate the effects of the dietary digestible lysine levels and environmental temperature on performance and carcass characteristics of broiler chickens from 22 to 42 days-old. Six hundred seventy two males Ross ® broiler chickens with an average weight of 726 g were allotted to a completely randomized design, in a 4 × 4 factorial arrangement with six replicates and seven birds per experimental unit. The chickens were fed with different digestible lysine levels in the diet (0.934, 1.009, 1.084, and 1.159%) and kept under different environmental temperatures (18.5, 21.1, 24.5, and 27.0°C). There were no interactions between environmental temperature and lysine levels in the diet for the studied variables. Feed intake and the weight gain (WG) were not influenced by lysine levels in the diet. Feed intake linearly reduced with the environmental temperature and the WG increased up to the estimated temperature of 21.5°C. The feed:gain ratio improved up to the estimated digestible lysine level in the diet of 1.085%. The weights of carcass (CW), boned breast (BBW), thigh (TW) and drumstick (DW) increased up to the estimated temperatures of 21.9, 21.7, 22.7, and 23.7°C, respectively. The yields of carcass (CY), thigh (TY) and drumstick (DY) increased, whereas the deboned breast weight (DBW), the boned breast yield (BBY) and deboned breast yield (DBY) linearly decreased with the environmental temperature. The TW and TY increased, whereas the DY linearly decreased with the lysine levels in the diet. The lysine levels did not influence the CW, BBW, DW, CY, BBY and DBY. The environmental temperature in the range from 18.5 to 27.0°C did not influence the lysine requirements of the birds. The condition that provided better feed:gain ratio during the experimental period was obtained with the digestible lysine level in the diet of 1.085% and the estimated environmental temperature of 23.3°C.

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Níveis dietéticos de lisina para frangos de corte de 1 a 21 e 22 a 40 dias de idade

Cited by 31 publications

References 17 publications

Dietary levels of lysine for male broilers from 23 to 36 days of age: performance and body composition

Dietary levels of lysine for male broilers from 23 to 36 days of age: performance and body composition

Níveis de lisina digestível para frangos de corte machos no período de 37 a 49 dias de idade

Níveis de lisina digestível da ração e temperatura ambiente para frangos de corte em crescimento

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