The optimal lysine and threonine intake for Cobb broiler breeder hens using Reading model

Silva, Edney Pereira da; Sakomura, Nilva Kazue; Oliveira, Cléber Franklin Santos de; Costa, Fernando Guilherme Perazzo; Dorigam, J. C. P.; Malheiros, Euclides Braga

doi:10.1016/j.livsci.2015.01.009

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…The effect seen on EW can be attributed to the ecological characteristics of the species ( Bowmaker and Gous, 1991 ) in preserving embryo competitiveness and maintaining a minimum EW to ensure posthatch survival ( Bowmaker and Gous, 1991 ; Silva et al., 2015a ; Lima et al., 2018 ), with the slightest variation was detected as significant by ANOVA ( Table 3 ). The EW reduction in broiler breeder hens is close to 10% ( Silva et al., 2015b ) and in commercial laying hens it is close to 20% ( Silva et al., 2015a ), whereas for Japanese quails in the present study, a value close to 30% was recorded ( Table 4 ), which was similar to that reported by Sarcinelli et al. (2020) .…”

Section: Discussionsupporting

confidence: 86%

Arginine requirement for egg production in Japanese quail

et al. 2022

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Section: Discussionsupporting

confidence: 86%

Arginine requirement for egg production in Japanese quail

et al. 2022

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“…Therefore, it is possible to make use of this potential, defined as a percentage of NR max T or deduced daily nitrogen retention as a performance parameter to determine the Lys requirements (Table 6). Compared with our previous study using the Reading model (Silva et al, 2015) to estimate Lys requirements for broiler breeder hens, this procedure is faster, because it is not necessary ten weeks (six of adaptation and four of egg collection) to obtain the results and produce similar results.…”

Section: Discussionmentioning

confidence: 98%

“…The derived optimal Lys intake of 915 mg/day calculated in the current study (Table 6) for broiler breeder hens from 31 to 35 weeks, with a nitrogen retention of 1371 mg/BW kg 0.67 per day that corresponds to 0.81 times the NR max T value (1684 mg/BW kg 0.67 per day) and was generally in line with the data range given in literature. Considering the optimum economic intake of lysine for a population of broiler breeder hens, Silva et al (2015) estimated 954 mg/hen per day using the Reading model. For maximum egg mass production, Ekmay et al (2013b) determined in two consecutive trials the daily requirements of digestible Lys as 909 mg and 919 mg in peak production, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, the Lys requirement should be known at high level of validity. From a biological point of view, Silva et al (2015) recommended a daily lysine intake of 643 mg/hen per day, which is lower than the recommendation of 954 mg/hen per day based on the optimum economic intake of lysine for a population of broiler breeder hens estimated by the Reading model. In another recent study, Ekmay et al (2013b) found the Lys intake of 909 and 926 mg/hen for product output (egg mass plus body weight gain) and feed conversion, respectively, considering 95% of the asymptote from the polynomial regression.…”

Section: Introductionmentioning

confidence: 89%

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Modelling of lysine requirement in broiler breeder hens based on daily nitrogen retention and efficiency of dietary lysine utilization

Dorigam

Sakomura

Soares

et al. 2017

Animal Feed Science and Technology

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The current feeding programs used for broiler breeder hens need information on how to make use of the genetic potential more efficiently by modelling the amino acid (AA) requirements. Thus, this study aimed to determine the model parameters for maximum nitrogen retention (NR max T), nitrogen maintenance requirement (NMR) and the efficiency of lysine utilization (bc −1) to determine the lysine (Lys) requirements of broiler breeder hens. Nitrogen balance trials were performed in two periods (I: 31-35 wks and II: 46-50 wks). Seven dietary treatments were used with eight replicates and one hen per cage; the treatments consisted of seven diets with protein levels ranging from 58.8 to 311.9 g/kg of feed, with Lys being limiting in the dietary protein (c = 3.91 g of Lys in 100 g of CP). For each period, nitrogen intake (NI), nitrogen excretion (NEX), nitrogen in egg mass (NEM), nitrogen deposition (ND) and nitrogen retention (NR, NR = ND + NEM + NMR) were obtained in a N balance trial of 25 days. The NMR was calculated as the intersection point of the exponential curve between NEX and NI at NI = 0. The NR max T and b (slope related to protein quality) were estimated by the exponential fit between NR and NI. The Lys efficiency bc −1 was obtained dividing b by c. The likelihood ratio test for the model parameters yielded 255 mg/BW kg 0.67 for NMR, 0.000117 for b and 1684 mg/BW kg 0.67 (period I) and 1484 mg/BW kg 0.67 (period II) for NR max T. The necessary Lys intake dependent on NR and Lys efficiency was derived by the equation Lys = (lnNR max T-ln(NR max T-NR))/(16 × bc −1). Lys intakes required to achieve 0.80 times the maximum potential (NR max T) were 915 mg and 876 mg in the period I and II, respectively. For broiler breeder hens, assuming 0.80 times the NR max T value and average efficiency of Lys utilization, 6.02 g/kg (31-35 wk) and 5.96 g/kg (46-50 wk) digestible dietary Lys were observed as optimal digestible Lys concentration in the diet (corresponding to 152 and 147 g of daily feed intake, respectively). Results of model calculations need verification in performance trials with evaluation of nitrogen deposition and varying dietary Lys efficiencies.

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“…The remaining nutrients and energy contents were refilled with feed ingredient (premixes, cellulose, dicalcium phosphate, limestone, soybean oil, sodium and potassium chlorides) to the same concentration as BD. The dilutions were based on the results from previous study with broiler breeder hens (Silva et al., ) in order to achieve a limiting response that was only obtained in the first AA level, corresponding to approximately 45% of the hen's requirements. In the upper AA levels, the responses were almost constant.…”

Section: Methodsmentioning

confidence: 99%

Optimal in‐feed amino acid ratio for broiler breeder hens based on deletion studies

Dorigam

Sakomura

Sarcinelli

et al. 2016

Animal Physiology Nutrition

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An ideal amino acid ratio (IAAR) for breeder hens is needed for maximum nitrogen retention (NR) taking into account nitrogen deposition in body (ND ), feathers (ND ) and egg mass (NEM) to improve dietary protein efficiency. Thus, the aim of this study was to apply the deletion method to derive the IAAR for broiler breeder hens. The nitrogen balance trials were performed from 31 to 35 weeks and from 46 to 50 weeks. Twelve treatments with eight replicates and one hen per cage were used. A balanced diet (BD) was formulated to meet the requirement of all nutrients. The other diets were formulated diluting 55% of BD with corn starch and refilled with amino acids (AAs) and other ingredients, except the AA tested. Each trial lasted 25 days. Feather losses, egg production and egg weight were recorded daily, and the samples were stored to further determine NEM and nitrogen in feather losses (ND ). At the start and the end of each period, a group of birds were slaughtered to further determine ND and ND . The NR was calculated as the sum of ND , ND , ND , NEM and the nitrogen maintenance requirement (NMR). The deletion of valine greatly depressed the NR in peak production (31 to 35 weeks) while the deletion of the isoleucine greatly depressed the NR of the hens from 46 to 50 weeks of age. The percentual reduction in NR and the per cent of the AA to delete from the BD were used to calculate the AA requirement. The average IAAR was Lys 100, Met+Cys 86, Trp 23, Thr 80, Arg 113, Val 90, Ile 91, Leu 133, Phe+Tyr 108, Gly+Ser 94 and His 35. The IAAR was in line with the recommendation from the literature, validating deletion method with the advantages from a rapid and low-cost procedure.

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The optimal lysine and threonine intake for Cobb broiler breeder hens using Reading model

Cited by 11 publications

References 19 publications

Arginine requirement for egg production in Japanese quail

Arginine requirement for egg production in Japanese quail

Modelling of lysine requirement in broiler breeder hens based on daily nitrogen retention and efficiency of dietary lysine utilization

Optimal in‐feed amino acid ratio for broiler breeder hens based on deletion studies

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