Digestible Lysine Requirements of Straight-Run Broiler Chickens from Fifteen to Twenty-Eight Days of Age

Mehri, Mehran; Nassiri-Moghaddam, H.; Kermanshahi, H; Mesgaran, M. Danesh

doi:10.3923/javaa.2010.2321.2324

Cited by 18 publications

(11 citation statements)

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“…However, FCR for both sexes was not significant (P>0.05). This indicates that males required a higher level of dietary lysine than females for maximal BWG and dietary digestible lysine for FCR was higher than for BWG (Greenwood et al, 2005;Dozier et al, 2009;Dozier et al, 2010;Indarsih and Pym, 2010;Mehri et al, 2010). Male growing chickens gained faster than females due to higher daily feed intake in males (Samadi and Libiert, 2006) were also observed in this study.…”

Section: Performancesupporting

confidence: 60%

Response of Different Genotypes of Broilers to Lysine Supplementation Raised Under Practical Condition

Indarsih

Tamsil

2012

J. Indonesian Trop. Anim. Agric.

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ABSTRAKPenelitian ini dilakukan untuk mengevaluasi suplementasi lisine pada broiler komersial umur 4 sampai 42 hari. Percobaan faktorial dengan 2 strain (Arbor Acres dan Lohmann) yang dibedakan jantan dan betina sebanyak 450 ekor, kemudian ditimbang dan secara acak ditempatkan pada 60 kadang bambu ukuran 2 m 2 dalam bangunan kandang terbuka. Starter komersial diberi lisin mono-HCL dengan level 0,0; 0,5; 1,0; 1,5; dan 2,0 g/kg dari umur 4-21 hari, kemudian diberi pakan finisher komersial dari umur 22-42 hari. Konsumsi pakan dan pertambahan bobot badan diukur setiap minggu. Pada umur 43 hari, 4 ekor untuk setiap ulangan diambil sebagai sampel dan dipotong untuk mengukur parameter karkas. Hasil penelitian menunjukkan bahwa penambahan lisin pada ransum komersial meningkatkan berat karkas secara signifikan (P<0,05), dan cenderung meningkatkan daging dada serta menurunkan lemak abdominal. Strain Arbor Acres merespon dengan baik pada pakan dengan lisin yang rendah sedangkan strain Lohmann merespon lebih baik pada pakan dengan lisin tinggi. Katakunci: lisin, broiler, strain, daging dada, lemak abdominal ABSTRACTThis study evaluated lysine supplementation of 4 to 42 day of age of two commercial broiler genotypes (Arbor Acres and Lohmann). Four hundred and fifty day-old chicks were sexed and randomly distributed into 60 bamboo pens each 2 m 2 . A starter commercial diet as a basal diet was supplemented with lysine mono-HCL in a 2x2x5 factorial arrangement with lysine levels of 0.0, 0.5, 1.0, 1.5 and 2.0 g/kg fed from 4-21 days of age, and then followed by a finisher diet fed from 22-42 days of age. Feed consumption, body weight gain and FCR were determined on weekly basis. On d 43 of experiment, 4 birds per each replicate were processed for carcass parameters. Results of the study revealed that lysine supplementation in a starter commercial diet increased significantly carcass weight (P<0.05. Improved breast meat and lower abdominal fat were found in lysine supplementation. Arbor Acres broilers response more efficient in low lysine whilst Lohmann broilers were better in a higher level of lysine.

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Section: Performancesupporting

confidence: 60%

Response of Different Genotypes of Broilers to Lysine Supplementation Raised Under Practical Condition

Indarsih

Tamsil

2012

J. Indonesian Trop. Anim. Agric.

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“…Most researchers have used univariate optimization in which a single amino acid being evaluated at a time and potential complex interactions among tested amino acid and other amino acids has been overlooked (Mehri et al, 2010a(Mehri et al, ,b, 2013. On other hand, interactive effects of amino acids on the performance and metabolism have been issued (D'mello and Lewis, 1970;Balnave and Brake, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Because the nutritional experiments involve more than one response, determination of optimum conditions on the independent variables requires simultaneous consideration of all the responses. However, the most studies report single evaluation of each response (e.g., BW gain or feed conversion ratio, FCR) in the optimization process at a time Baker, 1993, 1994a;Baker and Han, 1994;Baker et al, 2002;Mehri et al, 2010aMehri et al, ,b, 2012Zaboli et al, 2011;Ghazaghi et al, 2012;Mehri, 2012), and complex relationships among multiple responses have been overlooked. In addition, the bird responses are usually correlated functionally (e.g., FCR is a function of the feed consumed); therefore, analyzing performance data using a ABSTRACT The optimization algorithm of a model may have significant effects on the final optimal values of nutrient requirements in poultry enterprises.…”

Section: Introductionmentioning

confidence: 98%

Optimization of response surface and neural network models in conjugation with desirability function for estimation of nutritional needs of methionine, lysine, and threonine in broiler chickens

Mehri

2014

Poultry Science

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The optimization algorithm of a model may have significant effects on the final optimal values of nutrient requirements in poultry enterprises. In poultry nutrition, the optimal values of dietary essential nutrients are very important for feed formulation to optimize profit through minimizing feed cost and maximizing bird performance. This study was conducted to introduce a novel multi-objective algorithm, desirability function, for optimization the bird response models based on response surface methodology (RSM) and artificial neural network (ANN). The growth databases on the central composite design (CCD) were used to construct the RSM and ANN models and optimal values for 3 essential amino acids including lysine, methionine, and threonine in broiler chicks have been reevaluated using the desirable function in both analytical approaches from 3 to 16 d of age. Multi-objective optimization results showed that the most desirable function was obtained for ANN-based model (D = 0.99) where the optimal levels of digestible lysine (dLys), digestible methionine (dMet), and digestible threonine (dThr) for maximum desirability were 13.2, 5.0, and 8.3 g/kg of diet, respectively. However, the optimal levels of dLys, dMet, and dThr in the RSM-based model were estimated at 11.2, 5.4, and 7.6 g/kg of diet, respectively. This research documented that the application of ANN in the broiler chicken model along with a multi-objective optimization algorithm such as desirability function could be a useful tool for optimization of dietary amino acids in fractional factorial experiments, in which the use of the global desirability function may be able to overcome the underestimations of dietary amino acids resulting from the RSM model.

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“…The effects of limiting amino acids on performance of broiler chickens have been studied extensively (Hickling et al, l990;Kidd et al, 1996;Kidd et al, 2000;Carew et al, l997;Corzo et al, 2006;Mehri et al, 2010). 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).…”

Section: Introductionmentioning

confidence: 99%

“…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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Digestible Lysine Requirements of Straight-Run Broiler Chickens from Fifteen to Twenty-Eight Days of Age

Cited by 18 publications

References 0 publications

Response of Different Genotypes of Broilers to Lysine Supplementation Raised Under Practical Condition

Response of Different Genotypes of Broilers to Lysine Supplementation Raised Under Practical Condition

Optimization of response surface and neural network models in conjugation with desirability function for estimation of nutritional needs of methionine, lysine, and threonine in broiler chickens

Choice Feeding and Amino Acid Requirements for Broilers

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