Lysine partitioning in broiler breeders is not affected by energy or protein intake when fed at current industry levels

Ekmay, R. D.; Salas, C.; England, J.; Cerrate, S.; Coon, C. N.

doi:10.3382/ps.2013-03703

Cited by 18 publications

(16 citation statements)

References 14 publications

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“…On the other hand, the proportion of the ND B reduced from an average 63% (balanced diet) to approximately 45% (Fig. ), corroborating with the assumption that the body protein is fundamental to provide Lys to maintaining the egg mass production (Ekmay et al., ).…”

Section: Discussionsupporting

confidence: 83%

“…Lysine is an important AA for the synthesis of egg and body protein, and the absence of this AA results in lower egg production (Hiramoto et al., ). The body protein has an important role as a source of AA for egg formation (Ekmay et al., ). More recently, these authors suggested that Lys is incorporated at the rate of 78% in body protein in comparison with 22% present in the egg protein.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

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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show abstract

“…The metabolic pathway of lysine has been altered from muscle tissue to egg formation once broiler breeders commence their egg production, and the amount of lysine partitioned to egg formation changes according to the egg production rate [ 16 ]. In this regard, dietary lysine intake should be shortly adjusted as per hens’ age and stage of egg production, however no sufficient data on the responses to various levels of lysine in broiler breeder hens in an early-laying stage are available.…”

Section: Discussionmentioning

confidence: 99%

“…It is reasonable to assume that a relatively reduced egg production in hens offered the diet containing 0.55% and 0.59% total lysine might be partially due to decreased follicular recruitment into the F1 yolk follicle pool, evidenced by Robinson et al [ 30 ] where an increased atresia of small yellow follicles was observed when hens were unable to appropriately manage the ovarian follicles in the hierarchy. One reason for this could be due to the dietary lysine partitioning between maintenance and production was likely to be disturbed when dietary lysine was not adequate, suggested by Ekmay et al [ 16 ] found that lysine used for primarily towards muscle, and then excessive lysine utilized to egg production when needed in broiler breeder hens during the early laying period.…”

Section: Discussionmentioning

confidence: 99%

Estimating total lysine requirement for optimised egg production of broiler breeder hens during the early-laying period

Kim¹,

Wickramasuriya²,

Shin³

et al. 2020

J Anim Sci Technol

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The production performance of broiler breeder hens in response to different levels of total lysine during the early laying period was investigated. A total of 126 Ross 308 parent stock hens were offered one of seven dietary treatments formulating elevated contents of total lysine ranging from 0.55% to 0.79% (0.04 scale; 133 g of feed) from 23 to 29 weeks of age. Each treatment had six replicates with three birds per pen. Body weight was recorded triweekly and eggs were collected and weighted at 9:00 am daily. One hen from each pen was euthanized to collect blood samples and visceral organs were harvested and weighed. Egg production, egg weight and egg mass were lower ( p < 0.05) in hens offered a diet containing 0.55% total lysine compared to those fed the diet containing higher total lysine. Hens offered a diet containing 0.71%, 0.75%, and 0.79% total lysine had greater ( p = 0.008) egg production rate compared to those offered a diet containing lysine less than 0.71%. The number of total eggs produced tended to be greater ( p = 0.083) in hens offered a diet containing 0.71 and 0.75% total lysine compared to the other treatments. The number of settable egg production was higher ( p < 0.001) in hens offered a diet contacting 0.79% total lysine compared to those fed the diet containing lower levels of total lysine. The relative weights of oviduct and ovary were lower ( p < 0.05) in hens offered a diet containing 0.59% total lysine compared to the other treatments. No difference found in body weight, the number of total eggs, double-yolk eggs and abnormal shell eggs among the treatments. The urea nitrogen, estradiol-17 beta and progesterone in plasma were not affected by treatments. Based on linear- and quadratic-plateau models, total lysine requirements for egg production, settable egg production and egg mass at the early laying period were to be 0.73%, 0.77%, and 0.71%, respectively. Modern broiler breeder hens likely require higher total lysine than NRC recommendation in a diet for enhancing productivity during the early-laying period.

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“…Chen et al (2006) described that 50 to 60% of daily ad libitum feed reduced metabolic disease, and enhanced egg quality in female broiler breeders. In this regard, commercial broiler breeder feeds are formulated with low energy and crude protein levels (Ekmay et al, 2014). For instance, when the diets contained excess lysine, it could result in a higher muscle deposition but in a lower egg production and fertility rate during laying periods (Coon, 2004).…”

Section: Introductionmentioning

confidence: 99%

Standard Body Weight and Serum Estradiol and Progesterone Concentrations in Response to Total Lysine Content in Female Broiler Breeders from 14 to 42 Days after Hatch

Kim

Rew

Shin

et al. 2018

Rev. Bras. Cienc. Avic.

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This study was conducted to determine the total lysine requirement for female broiler breeders from days 14 to 42. Two-hundred and ten female broiler breeders were used in a completely randomized design with 6 replicates per treatment and 5 chicks per pen under restricted feeding. The contents of total lysine used in this experiment were 0.68, 0.72, 0.76, 0.80, 0.84, 0.88 and 0.92% in the diet. A basal diet was formulated to meet or to exceed the Ross 308 female broiler breeders' nutrient specifications except for the lysine. Body weight and feed intake were measured to calculate feed efficiency, and body weight uniformity was defined on a weekly basis. One chick per pen was randomly selected to collect blood samples, organ and an abundance of sexual maturity associated miRNAs (miR-21, mi-26a and mi-375) in the plasma was measured on day 42. Increasing total lysine contents in the diet improved body weight gain and feed conversion ratio from days 14 to 42. The combined values from the two models for BW, average daily gain and feed efficiency were estimated at 1.04, 1.00 and 1.21% total lysine, respectively. Total lysine contents did not affect the ovary weight, serum estradiol-17β, serum progesterone and plasma urea nitrogen or the expression levels of the three miRNAs on day 42. Therefore, the results from the current study indicated that female broiler breeders fed on 0.68% total lysine could achieve the recommended BW, suggested by field practice when data were fitted into the overlapped point of linear-, and quadratic-plateau models.

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Lysine partitioning in broiler breeders is not affected by energy or protein intake when fed at current industry levels

Cited by 18 publications

References 14 publications

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

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

Estimating total lysine requirement for optimised egg production of broiler breeder hens during the early-laying period

Standard Body Weight and Serum Estradiol and Progesterone Concentrations in Response to Total Lysine Content in Female Broiler Breeders from 14 to 42 Days after Hatch

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