Efficacy of pre-lay diet

Shunmugaperumal, Tamilvanan; Rajini, R. Asha; Prabakaran, R.

doi:10.1080/09712119.2013.822803

Cited by 10 publications

(16 citation statements)

References 26 publications

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“…These findings are in line with those found in the literature, where dietary protein levels prior to sexual maturity did not influence egg production ( Hussein et al, 1996 ; Keshavarz, 1998 ). However, a previous study has shown a positive effect of prelay diet on production performance ( Sujatha et al, 2014 ). They reported that an increase in energy and protein levels in a prelay diet improves production performance.…”

Section: Discussionmentioning

confidence: 96%

“…Dietary manipulation during the prelay period can be an effective way of maintaining flock uniformity and enhancing production performance in the laying flock. The development of secondary reproductive organs and growth of ovarian follicles is thought to be between 4 and 6 wk before the first egg (16–18 wk of age) ( Cave, 1984 ), and rapid physiological changes occur during the prelay phase ( Sujatha et al, 2014 ). The diet’s energy and protein content must be adjusted to ensure that hens consume enough nutrients needed to cope with growth and onset of egg production ( Bain et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

“…The diet’s energy and protein content must be adjusted to ensure that hens consume enough nutrients needed to cope with growth and onset of egg production ( Bain et al, 2016 ). Preliminary evidence has demonstrated that the increase of energy and protein levels in the prelay diet increases production performance in laying hens ( Lilburn and Myers-Miller, 1990 ; Sujatha et al, 2014 ). Cave (1984) reported that a high-protein prelay diet could remarkably increase egg production in laying hens.…”

Section: Introductionmentioning

confidence: 99%

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Dietary Energy and Protein Levels During the Prelay Period on Production Performance, Egg Quality, Expression of Genes in Hypothalamus-Pituitary-Ovary Axis, and Bone Parameters in Aged Laying Hens

Qian

Jiao

et al. 2022

Front. Physiol.

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Nutrition during the pre-lay period takes effect on the production performance in the laying flock. This study evaluated the effects of dietary energy and protein levels in pre-lay diet on performance during the whole laying period and the egg quality, bone quality, and mRNA expression of hypothalamus-pituitary-gonadal (HPG) axis-related genes of hens at the end of the laying cycle. A total of 1,856 15-wk old Hy-Line brown pullets were randomly assigned to one of the four dietary treatments: using a 2 × 2 factorial arrangement with 2 energy levels (2,700 and 2,800 kcal/kg ME, respectively) and 2 protein levels (15 and 16.5% CP, respectively). Pullets were fed ad libitum from 15 to 20 wk and from 20 wk onward, fed with a similar laying diet till 72 wk of age. At 72 wk, the expression of genes in the hypothalamus, pituitary, ovarian, and follicles and bone quality was evaluated. At 72wk, there were no differences in production performance, BW, organ index, and ovarian parameters among the dietary treatments. High-CP diet increased the egg shape index and eggshell thickness (p < 0.05), but the eggshell breaking strength, Haugh unit, and albumen height did not differ among the treatments. Neither dietary energy nor protein level took an effect of bone quality. Low-energy diet increased the mRNA expression of gonadotropin-releasing hormone-1 (GnRH-1) in the hypothalamus (p < 0.05). The mRNA expression level of estrogen receptor-1 (ESR-1) in the hypothalamus and ovary was elevated by the 2,700 ME-15%CP diet (p < 0.05). The expression of cytochrome family 17 subfamily A polypeptide 1 (CYP17A1) in the large white follicle (LWF), small yellow follicles (SYF) and dominant follicle (DF) was decreased by the 2,800 kcal/kg diet (p < 0.05). These results indicate that the prelay diet had no influence on the production performance but had minimal effect on the eggshell characteristics and bone parameters. These results suggest that the energy and protein level of the prelay diet changes the expression of HPG axis-related genes of hens around the end of the laying cycle without changing the circulating sex hormone profile. The effect of prelay diet on the endocrinal adjustment at the end of the laying cycle needs to be investigated further.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dietary Energy and Protein Levels During the Prelay Period on Production Performance, Egg Quality, Expression of Genes in Hypothalamus-Pituitary-Ovary Axis, and Bone Parameters in Aged Laying Hens

Qian

Jiao

et al. 2022

Front. Physiol.

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“…Sexual maturity and the beginning of the laying period are critical for laying hens, and may negatively impact hens’ performance [ 1 ]. The pre-peak period is a physically challenging period for young chickens as nutrient deficiencies can affect liver and bone metabolism [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Dietary Pomegranate By-Product Alleviated the Oxidative Stress Induced by Dexamethasone in Laying Hens in the Pre-Peak Period

Eid

Kirrella

Tolba

et al. 2021

Animals

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This experiment was conducted to assess the inclusion of the by-products of pomegranate peels to ameliorate the harmful impacts of oxidative stress in the pre-peak period of laying hens. For this, 120 local Egyptian strain hens (Inshas hens) aged 24 weeks old were used in four treatments. Pomegranate peel powder was included at 2% and 4% in the diets of laying hens subjected to oxidative injuries induced by dexamethasone compared with negative and positive control groups for 12 weeks. The addition of pomegranate peel powder (PPP) reduced the adverse effects of oxidative stress induced by dexamethasone on body weight (p = 0.006) and egg production (p = 0.010) comparing to the positive control. Additionally, pomegranate peel powder had a significant positive lowering effect on plasma cholesterol (p < 0.001) and triglyceride contents (p = 0.005) compared to control groups. The lipid peroxidation indicators (MDA) were reduced, but the antioxidative enzymes (SOD, CAT, and GPx) and total antioxidant blood capacity were improved with PPP. Based on the obtained data, the present research recommends using dietary PPP up to 4% to mitigate adverse oxidative stress effects in the pre-peak laying period and as a sustainable and economical approach for agricultural development.

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“…Two to three weeks before laying the first egg, there is a significant increase in the weight gain of the egg-laying hens that seek to accumulate body reserves to support the production and size of the eggs during the egg-laying cycle (Summers, 1993). Besides, towards the end of the growth period, there is a rapid development of the ovary and the oviduct and an increase in the size of the liver (Sujatha et al, 2014). From the nutritional point of view, adequate contribution of energy and protein in the diet should be considered at this stage, as this will allow the correct accumulation of body reserves (Cankaya et al, 2008) and appetite stimulation in the animal, to increase its feed intake capacity (Leeson & Summers, 2000;Lazaro & Mateos, 2008).…”

Section: Introductionmentioning

confidence: 99%

Crude Glycerin and Energy Density of Diets for Growing, Pre-Lay and Pre-Peak Backcob Brown Egg-Laying Hens

Avellaneda

Ariza-Nieto

Afanador-Téllez

2020

Braz. J. Poult. Sci.

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A total of 320 13-weeks-old pullets were weighed and randomly allocated to treatments comprised by four levels of crude glycerin (0, 3, 6 or 9%) and two levels of ME (metabolizable energy, difference of 100 kcal/kg) in the diets growing (14 to 17 weeks of age), pre-lay and pre-peak (low: 2750, 2800 and 2750 kcal/kg and high: 2850, 2900 and 2850 kcal/kg, respectively). During the study, body weight was registered until 30 weeks of age, feed intake, egg weight and egg-production for each repetition and for individual hens were measured every week. The information was analyzed through a completely randomized design with a 4x2 factorial arrangement. During the growing phase, hens that received low energy diets consumed more feed (p<0.05), gained less body weight (p<0.05) and recorded lower feed conversion (p<0.05). Besides, a positive linear effect (p<0.05) was observed when including glycerin on feed conversion and weight gain. During the initial egglaying phase, hens fed low-energy diets consumed more feed (p<0.05) and laid lighter eggs (p<0.05). Furthermore, a positive linear effect (p<0.05) of including crude glycerin on egg yield and feed intake was observed. After the egg-laying peak, the hens of high energy groups consumed 1.6 g/d less feed (p<0.05) and lay 0.9% less eggs, also, it a quadratic effect of inclusion of glycerin on laying-eggs was observed. In conclusion, the use of high energy diets decrease feed intake, increase egg weight until peak, but decrease the percentage of eggs post-peak; glycerin used in diets increases feed intake and improves egg-laying rate in different ways during the laying phase.

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Efficacy of pre-lay diet

Cited by 10 publications

References 26 publications

Dietary Energy and Protein Levels During the Prelay Period on Production Performance, Egg Quality, Expression of Genes in Hypothalamus-Pituitary-Ovary Axis, and Bone Parameters in Aged Laying Hens

Dietary Energy and Protein Levels During the Prelay Period on Production Performance, Egg Quality, Expression of Genes in Hypothalamus-Pituitary-Ovary Axis, and Bone Parameters in Aged Laying Hens

Dietary Pomegranate By-Product Alleviated the Oxidative Stress Induced by Dexamethasone in Laying Hens in the Pre-Peak Period

Crude Glycerin and Energy Density of Diets for Growing, Pre-Lay and Pre-Peak Backcob Brown Egg-Laying Hens

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