Lysine Requirement of Broiler Chickens Fed Low-density Diets under Tropical Conditions

Aftab, Usama; Ashraf, Muhammad; Mumtaz, Arif; Jiang, Zhong‐Xing

doi:10.5713/ajas.2007.939

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…This is similar to previous studies reported by some workers (Sterling et al, 2006;Aftab et al, 2007;Viola et al, 2009). However, this study also obtained at the highest feed intake did not increase the abdominal fat.…”

Section: Performancesupporting

confidence: 83%

“…Therefore, some studies revealed the need to correct the proportion levels of crude protein to lysine (Harm and Russell, l995;Labadan et al, 2001). This is due to the fact that the lysine requirement is higher than the NRC (1994) requirement measured with the experimental situation (Lehmann et al, 1996;Kerr et al, 1999;Rezaei et al, 2004;Aftab et al, 2007;Indarsih and Pym, 2010). Breast meat deposition can be optimized on feeding at a higher level of lysine in the starter and finisher diets than those recommended by NRC (1994) as studied by Rezaei et al (2004).…”

Section: Introductionmentioning

confidence: 99%

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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: 83%

Section: Introductionmentioning

confidence: 99%

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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“…The results of present study demonstrated that the impact of BP on BW was strictly linear, and no apparent plateau was reached up to the highest BP level, suggesting that the 'requirement' of broilers for BP could have been even higher than those observed in the current study. Conversely, our previous experiments using similarly low ME basal diets, but making use of the conventional graded-supplementation approach, suggested that digestible lysine requirement for BW was 0.85 and 0.75% of diet, respectively during the starter and grower/finisher phase (Aftab et al, 2007). In this respect, findings of the current study seems to agree with those reported by Wijtten et al (2004), who demonstrated that broiler weight gain broilers responded to higher dietary Ideal Protein (or BP) levels than would be expected from single lysine requirement studies in literature.…”

Section: -----------------------------Probability--------------------mentioning

confidence: 86%

“…The requirements of broilers for various amino acids during different growout phases have been extensively studied. In general, two methodologies have been used to study the responses to individual amino acids: graded supplementation (Mack et al, 1999;Baker et al, 2002;Aftab et al, 2007) and diet dilution (Gous & Morris 1985). The common aspect between these two techniques is that, except for the amino acid under investigation, amino acids are supplied in large excess.…”

Section: Introductionmentioning

confidence: 99%

Response of broilers to practical diets with different metabolizable energy and balanced protein concentrations

Aftab¹

2009

Rev. Bras. Cienc. Avic.

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Experiment was conducted to study the effect of Metabolizable Energy (ME) and Balanced Protein (BP) on the performance of 1- to 35-day-old male and female Hubbard x Hubbard broilers. Set in a factorial arrangement, dietary treatments involved 3 levels of ME (2650, 2750, or 2850 kcal per kg diet) and 4 levels of Balanced Protein (expressed as 8.4, 9.0, 9.6, or 10.2 g Standardized Ileal Digestible lysine per kg). Each diet was fed to 5 replicate pens of 17 chicks. Dietary ME and BP did not interact for any of the parameters studied (p>0.05). The main effect of ME was significant (p<0.05) for feed intake, body weight, and feed conversion ratio at all ages. Highest ME (2850 kcal) resulted in 35 day feed intake and feed conversion ratio that was significantly (p<0.05) low compared with those fed on lower levels of ME; while 35 day body weight was significantly (p<0.05) high at 2850 kcal compared with 2650 kcal ME. Feed intake and body weight improved linearly (p<0.05) with increasing BP from 8.4 to 10.2 g per kg, while the BP did not have any effect on feed conversion ratio. Dietary combinations of ME and BP to optimize body weight and feed conversion ratio are suggested on weekly basis

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“…These authors concluded that the methionine requirement for 21-42 days of age male broilers decreased from 1.21 g per Mcal ME at 21C to 1.09 g per Mcal ME at diurnally cycling temperatures of 25 to 35C and 0.92 g per Mcal ME at constant high temperature (30C). In our study, although we didn't aim at direct estimation of the optimum amino acid ratios, we can still calculate the M+C to lysine ratios using the requirement estimates of the present experiments with those of lysine studies (Aftab et al 2007) conducted under similar dietary (low-ME basal diets) and environmental context (heat-stress conditions). Its is however emphasized that these should be considered only as a reference, as use of different basal diets across experiments cast doubt on the use of these ratio estimates for practical feed formulation purpose.…”

Section: Discussionmentioning

confidence: 99%

Methionine+cystine requirement of broiler chickens fed low-density diets under tropical conditions

Aftab

Ashraf

2008

Trop Anim Health Prod

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Two experiments were conducted to determine the M+C requirement of straight-run broiler chickens (Hubbard x Hubbard) during the period 4-21 (Exp. 1) and 21-40 (Exp. 2) days of age. Experiments were conducted during summer months (July-August) in open-sided houses, thus exposing chicks to chronic heat stress. Daily min-max temperature averaged 26-37C (Exp. 1) and 23-36C (Exp. 2). M+C deficient basal diets were formulated to contain low-nutrient-density, i.e., 2750 kcal per kg ME, 20.1% CP (Exp. 1), and 2780 kcal per kg ME, 17.0% CP (Exp. 2). Diets were supplemented with DL-methionine to provide total M+C level ranging from 0.64 to 0.89 % (six increments) and 0.54 to 0.79% (six increments), respectively in experiment 1 and 2. Requirements (0.95 of the maximum quadratic response) were found to be 0.77 and 0.75% total M+C, respectively for gain and feed efficiency, during 4-21 days; and 0.67% total M+C for both gain and feed efficiency during 21-40 days of age. Calculated on the digestible M+C basis, the estimates were 0.67 and 0.65% respectively for gain and feed efficiency during 4-21 days of age; and 0.60% for gain and feed efficiency during 21-40 days of age.

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Lysine Requirement of Broiler Chickens Fed Low-density Diets under Tropical Conditions

Cited by 5 publications

References 7 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

Response of broilers to practical diets with different metabolizable energy and balanced protein concentrations

Methionine+cystine requirement of broiler chickens fed low-density diets under tropical conditions

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