Effects of dietary digestible lysine levels on protein and fat deposition in the carcass of broilers

Tavernari, F. de C.; Buteri, Charles Bernardo; Rostagno, Horácio Santiago; Albino, L. F. T.

doi:10.1590/s1516-635x2009000200005

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…In experiments with chickens in the phases of 1 to 21, 10 to 20 and 10 to 21 days of age, respectively, Conhalato et al (1999), Edwards et al (1999) and Eits et al (2002) observed increased deposition of protein in the carcass as the lysine levels of the diet were elevated. However, these results differ from those found by Cella et al (2009) andTavernari et al (2009), who did not observe variation in protein deposition in male broilers in the period of 1 to 21 days of age fed diets supplemented with 11.4, 11.8, 12.2 and 12.6 g/kg and 10.73 and 11.60 and 12.47 g/kg lysine, respectively. The variation in the results observed between the studies might be related to the lysine levels assessed, to the genetic potential of the birds for protein deposition in the carcass, and to the composition of the experimental diet.…”

Section: Resultscontrasting

confidence: 99%

Lysine levels in diets for broilers from 8 to 21 days of age

Oliveira¹,

Oliveira²,

Donzele³

et al. 2013

R. Bras. Zootec.

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This study was conducted to evaluate the effects of digestible lysine levels in diets with and without supplementation of industrial amino acids on performance and fat deposition in the carcass of broilers in the starter phase. One thousand four hundred and forty chickens with initial weight of 168.1±5.0 g were distributed in a completely randomized experimental design, in a 5 × 2 factorial arrangement, composed of five digestible lysine levels (10.0, 11.0, 12.0, 13.0 and 14.0 g/kg) and two types of diet (diet with different proportions of corn and soybean meal and diet supplemented with industrial amino acids to obtain the digestible lysine levels), with eight replications and 18 birds per replication. There was interaction effect only on weight gain and fat deposition in the birds. The lysine levels reduced feed intake linearly in both diets, but caused a linear increase in lysine intake. The lysine levels quadratically affected weight gain and feed conversion, which improved up to the estimated levels of 13.0 and 12.8 g/kg lysine, respectively, when the corn:soybean meal ratio of the diet changed. In the diets supplemented with amino acids, the lysine levels increased weight gain and improved feed conversion linearly. Regardless of the type of diet, protein deposition increased linearly, whereas fat deposition reduced also linearly, as the lysine levels in the diets were increased. The levels of 13.0 and 14.0 g/kg digestible lysine provide, respectively, the best performance in birds fed a diet in which the proportion of corn and soybean meal varies and a diet supplemented with industrial amino acids, in the period from 8 to 21 days of age.

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Section: Resultscontrasting

confidence: 99%

Lysine levels in diets for broilers from 8 to 21 days of age

Oliveira¹,

Oliveira²,

Donzele³

et al. 2013

R. Bras. Zootec.

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“…Growth responses and carcass composition of broilers to amino acids can be improved by appropriate levels (Kerr et al, 1999;Kamran et al, 2004;Corzo et al 2006;Tavernari et al, 2009;Mehri et al, 2010). On the other hand, depressed growth rate and increase abdominal fat were associated with failure in amino acid supplementation in conventional feeding system due to deficiency in amino acid intake (Saxena et al, 1962;Kidd et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Choice Feeding and Amino Acid Requirements for Broilers

Indarsih

Pym

2011

J. Indonesian Trop. Anim. Agric.

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ABSTRAKPenelitian ini dilakukan menggunakan faktorial untuk mengetahui respon ayam pedaging komersial terhadap pemberian pakan bebas memilih and asam amino esensial terbatas terhadap pertumbuhan dan komposisi karkas. Sebanyak 432 ekor anak ayam umur satu hari ditimbang dan dibagi secara acak pada 48 kandang indukan dari kawat dengan ukuran 1 m 2 . Penelitian menggunakan 2 strain broiler betina dan jantan dan 4 perlakuan pakan dengan 6 ulangan terdiri dari 9 ekor setiap ulangan. Ayam diberi ransum yang merupakan campuran summit dan dilution dengan estimasi kandungan protein 240 g/kg pada umur satu hari kemudian ayam memperoleh pakan dengan protein 120, 150 atau 180 g/kg pada umur 42 hari untuk betina, sedangkan yang jantan memperoleh pakan dengan protein 130, 160, atau 190 g/kg atau ayam diberi kesempatan memilih summit dan dilution. Pada umur 42 hari ayam dipotong untuk diukur komposisi karkasnya. Hasil penelitian menunjukkan bahwa kebutuhan asam amino untuk meningkatkan bobot badan lebih tinggi dari yang direkomendasikan oleh NRC. Pemberian pakan bebas memilih menunjukkan pertumbuhan maupun komposisi karkas yang lebih baik dibanding dengan pemberian ransum protein rendah. Kata kunci: bebas memilih , summit and dilution, pertumbuhan, ayam pedaging ABSTRACTThe study was conducted as a completely randomized design, with a factorial arrangement to determine the response of commercial broilers to choice feeding and limiting amino acids on growth and carcass performance. A total of 432 male birds were weighed at one-d-old and randomly distributed to 48 wire-floored brooder cage each 1.0 m 2 . There were 2 sexes and 4 dietary treatments with 6 replicates each of 9 birds. Birds were given one of three dietary regimens with dietary change every 7 days. All groups were fed free choice of summit and dilution diets. The estimated dietary level of crude protein at day-old was 240 g/kg and the level at 42 d was either 120, 150 or 180 g/kg for females or 130, 160 and 190 g/kg for males. At 43 d of age, all birds from each dietary treatment were slaughtered for measurement of body composition. Results reveal that lysine requirement for maximum gain in this study was higher than NRC recommendation. The free choice-fed bird was significantly higher, in terms of growth and body composition than that obtained on the low dietary protein regimen.

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