Digestible lysine requirements of broilers

Bernal, L.; Tavernari, F. de C.; Rostagno, Horácio Santiago; Albino, L. F. T.

doi:10.1590/s1516-635x2014000100007

Cited by 24 publications

(28 citation statements)

References 7 publications

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“…In this period, an interaction (p<0.05) between factors (sex and diet) was observed in the feed intake (Table 4), with males consuming diets in greater proportion (around 9.3% more) than females. Similar results were reported by Costa et al (2001); Mendes et al (2004); Sabino et al (2004); Kolling et al (2005); Lima et al (2008); Bernal et al (2014) and Tavernari et al (2014), who, when evaluating diets with different levels of crude protein, energy and amino acids in the finisher phase, observed differences regarding sex, in which male broilers showed best performance. FI (g)-Feed intake; BW (g)-Body weight; WG (g)-Weight gain; FC-Feed conversion; VF-Flock viability; PEI-Index of production efficiency.…”

Section: Resultssupporting

confidence: 88%

“…Concerning carcass yield results (Table 5), there was no difference (p>0.05) among the factors, i.e., regardless of their diets and nutritional levels, similar behaviors were reported for males and females. Costa et al (2001); Almeida et al (2002); Mendes et al (2004); Bernal et al (2014) and Tavernari et al (2014) confirmed this result, having reported that male and female chicken carcass yields were not influenced by the nutritional levels of treatments (changes in ME, CP, and AA). Significant effects regarding carcass yield were shown by Sabino et al (2004) and Lima et al (2008), indicating that the carcass yield can improve with an increase in CP, or amino acid levels in the diet followed by average levels of energy, respectively.…”

Section: Resultssupporting

confidence: 71%

“…However, in order for feed improvement and to change the nutritional levels of the diets, it is necessary to take the interference of the bird's sex into account, since each sex exhibits differentiated metabolic behavior. In other words, the male chicken may require higher amounts of nutrients, in comparison to the female, due to its greater growth capacity (more significant body weight gain), which will be represented in greater absolute weights for eviscerated carcass, thigh, drumstick and, in some cases, larger absolute weights of breast with bone and breast fillet (Sá et al, 2012;Bernal et al, 2014;Tavernari et al, 2014).…”

Section: Effects Of Nutritional Levels On Performance Carcass Characmentioning

confidence: 99%

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Effects of Nutritional Levels on Performance, Carcass Characteristics and Nutrient Digestibility of Sexed Broilers

Muñoz

Suckeveris

Demuner

et al. 2018

Rev. Bras. Cienc. Avic.

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The objective of this study was to evaluate the effects of dietary nutrient levels on performance, carcass yield, commercial cuts, digestibility and economical viability of broilers from 1 to 42 days of age. During the experiment, 180 COBB 500™ chicks were housed in metal batteries and subjected to a completely randomized design in a 2x3 factorial arrangement, of two sexes and three diets (male, female and mixed), totaling 6 treatments and 6 repetitions of 5 birds each. Data were subjected to statistical analysis and the means were compared using the Tukey test, at 5% probability. The results indicate the effect of sex on performance and commercial cuts, except for breast and thigh fillets, in which males and females showed similar results when given the mixed diet. The influence of the nutritional levels on performance, digestibility and commercial cuts was observed, in which the female diet showed the highest results for feed intake, body weight and weight gain, in addition to greater retention of protein and crude energy. For drumstick and abdominal fat yield, the highest values were obtained using the mixed diet and the female diet, and the lowest values were obtained using the male diet. Regarding economic viability, the female diet showed the highest return per unit of Real (R$) spent on feed. Therefore, these data prove that the female diet had a positive effect when provided to both sexes, and it may be a promising alternative for its application at the production level.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 71%

Section: Effects Of Nutritional Levels On Performance Carcass Characmentioning

confidence: 99%

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Effects of Nutritional Levels on Performance, Carcass Characteristics and Nutrient Digestibility of Sexed Broilers

Muñoz

Suckeveris

Demuner

et al. 2018

Rev. Bras. Cienc. Avic.

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“…Even more markedly, the experimental diet induced a reduction in BMY (−10%, P < 0.0001) and an increase in AFP (+21%, P < 0.0001) compared with the control diet, without changing LY. It has been established that Lys has a major impact on broiler carcass composition and that birds' Lys requirements for optimal BMY are greater than those based on optimal growth (Dozier et al, 2008;Bernal et al, 2014). Breast muscle in broilers serves as a protein store which is highly solicited in cases of AA deficiency (Tesseraud et al, 1999), which could explain the higher response of the breast muscle to Lys deficiency compared with other skeletal muscles.…”

Section: Resultsmentioning

confidence: 99%

Combined effect of divergent selection for breast muscle ultimate pH and dietary amino acids on chicken performance, physical activity and meat quality

Alnahhas¹,

Berri²,

Chabault-Dhuit³

et al. 2017

Animal

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Responses to changes in dietary Lys and other essential amino acid (AA) concentrations were evaluated in 480 male and female broilers originating from two lines divergently selected for high (pHu+) or low (pHu−) ultimate pH (pHu) of breast muscle. The two genetic lines were fed with two grower isoenergetic diets differing in both true digestible Lys (control = 10.2 g/kg and experimental = 7.0 g/kg) and amounts of other essential AA calculated in relation to Lys, which were sufficient for the control diet or in excess for the experimental diet. There were six repetitions per treatment. Birds were weighed individually at days 0, 21, 28 and 43. Feed consumption was recorded per pen and feed conversion was calculated over the growing period. The physical activity and walking ability of broilers were recorded during the whole rearing period. Breast and leg yield, and abdominal fat percentage were measured at 43 days of age, as were pHu, color, drip and cooking loss, Warner-Bratzler shear force, and curing-cooking yield of the breast Pectoralis major and pHu of the thigh Sartorius muscle. Divergent selection greatly affected most breast meat quality traits without significantly changing growth rate or feed efficiency. When subjected to a variation in dietary intake of AA, birds from the two genotypes responded in a similar way in terms of animal's growth, feed efficiency, body composition and meat quality traits. Although line and diet did not affect physical or feeding activities of the broilers, a significant effect of line-by-diet interaction was observed on gait score. Contrary to the pHu− birds, the walking ability of pHu+ birds was impaired when fed the control diet that favored growth and breast muscle development and limited storage of carbohydrate in muscle.

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“…However, according to Nascimento et al (2009), higher lysine intakes could promote higher muscle deposition and lower carcass fat accumulation, resulting in better FCR in chickens. Lower FCR for males and females broiler chickens were previously estimated at dietary lysine levels of 1.22 and 1.24%, respectively (Bernal et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Digestible Lysine on Live Performance of Chicken Type Naked Neck During the Starter Phase

Oliveira

Pinheiro

Castro

et al. 2015

Rev. Bras. Cienc. Avic.

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The poultry market has changed due to a higher consumer interest on products with differentiated organoleptic characteristics, making of free-range broiler production a promising activity. This experiment was conducted to determine the digestible lysine requirements of Redbro Cou Nu male and female chickens during the starter phase (one to 21 days of age). Six hundred and thirty Redbro Cou Nu broilers were distributed into 30 pens (21 chickens/pen) according to a randomized complete design in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine and two sexes, with three replicates (pens) per treatments. Diets with increasing digestible lysine levels (8.1, 9.5, 10.9, 12.3 and 13.7 g of digestible lysine per kg of diet) were offered ad libitum. The following performance traits were evaluated at the end of the experiment (d 21): feed intake, lysine intake, body weight gain, and feed conversion ratio. No interaction between dietary lysine level and sex was observed for the evaluated traits. The effect of sex was only detected on body weight gain, while effects of dietary lysine level were only detected on the feed intake. Males presented higher body weight gain than females. Lysine intake and body weight gain increased, and feed conversion ratio decreased as the level of dietary lysine increased. The best feed conversion ratio was obtained when birds were fed 12.95 g of digestible lysine per kg of diet.

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Digestible lysine requirements of broilers

Cited by 24 publications

References 7 publications

Effects of Nutritional Levels on Performance, Carcass Characteristics and Nutrient Digestibility of Sexed Broilers

Effects of Nutritional Levels on Performance, Carcass Characteristics and Nutrient Digestibility of Sexed Broilers

Combined effect of divergent selection for breast muscle ultimate pH and dietary amino acids on chicken performance, physical activity and meat quality

Digestible Lysine on Live Performance of Chicken Type Naked Neck During the Starter Phase

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