The effects of alternative forced-molting methods on the performance and egg quality of commercial layers

Molino, AB; Garcia, Edivaldo Antônio; Berto, Dirlei Antônio; Pelícia, K; Silva, AP; Vercese, Francine

doi:10.1590/s1516-635x2009000200006

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…The results of eggs' production in the postmolting phase are in agreement with previous studies (RAMOS et al, 1999;KESHAVARZ;QUiMBY, 2002;MOLiNO et al, 2009). in these publications, the number of eggs was greater for birds that received total feed restriction for inducing molt.…”

Section: Resultssupporting

confidence: 92%

Methods of feed restriction for molt induction in commercial laying hens

et al. 2014

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An experiment was carried out to evaluate methods of quantitative or qualitative feed restriction for inducing molt on the performance of Hy -Line Brown layers in the second lay cycle. Two hundred and twenty -five birds with 88 wks-old Hy -Line Brown were used in a completely randomized design with five treatments: Quant 100 -restriction of 100% of the daily amount recommended by lineage manual; Quant 75 -restriction of 75% of the daily amount recommended; Quant 50 -restriction of 50% of the daily amount recommended; Qual 75 -supply of an ad libitum diet with 75% grinded rice hulls and 25% of basal diet; Qual 50 -supply of an ad libitum diet with 50% of grinded rice hulls and 50% of basal diet. The feed conversion ratio per dozen eggs and egg mass was similar (P=0.0035 and P=0.0139) between Quant 75 and Qual 75 methods, in relation to Quant 100 . The eggs production was similar (P=0.0122) among the hens from Quant 75 , Quant 50 and Qual 75 methods, in relation to Quant 100 . The methods of feed restriction did not alter the eggs density (P=0.8971). Quant 75 or Qual 75 methods can substitute the conventional method for inducing molt in Hy-Line Brown layers, without modifying the performance in the second lay cycle. Key words: Brow egg, commercial laying, Gallus gallus, molt, performance ResumoO objetivo do trabalho foi avaliar métodos de restrição alimentar quantitativa ou qualitativa para a indução a muda sobre o desempenho de poedeiras Hy-Line Brown no segundo ciclo de produção. Foram utilizadas 225 aves com 88 semanas de idade em um delineamento inteiramente casualizado com cinco tratamentos: Quant 100 -restrição de 100% da quantidade diária de ração recomendada para a linhagem; Quant 75 -restrição de 75% da quantidade diária de ração recomendada; Quant 50 -restrição de 50% da quantidade diária de ração recomendada; Qual 75 -dieta com 75% de casca de arroz e 25% de dieta basal; Qual 50 -dieta com 50% casca de arroz e 50% de dieta basal. A conversão alimentar por dúzia e por massa de ovos foi similar (P=0,0035 e P=0,0139) para os métodos Quant 75 e Qual 75 em relação ao Quant 100 . A produção de ovos foi semelhante (P=0,0122) para as poedeiras dos tratamentos Quant 75 , Quant 50 e Qual 75 em relação ao Quant 100 . Os métodos de restrição alimentar não alteraram (P=0,8971) a densidade dos ovos no segundo ciclo. Os métodos Quant 75 ou Qual 75 podem substituir o método tradicional (Quant 100 ) para induzir a muda em poedeiras Hy-Line Brown, sem alterações no desempenho das aves no segundo ciclo de produção. Palavras-chave: Desempenho, Gallus gallus, ovo marrom, postura comercial, troca de penas

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Section: Resultssupporting

confidence: 92%

Methods of feed restriction for molt induction in commercial laying hens

et al. 2014

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“…Park et al (2004) reported body weight loss of 15.52 and 15.60 % over 9 days in laying hens moulted with zinc acetate and zinc propionate, respectively while those subjected to feed withdrawal lost 25.12 % of their body weight within the same period. Molino et al (2009) observed body weight loss of 21.19 % by D 7 in hens undergoing fasting moult which agreed with the result of the present study. Whatever the moulting method employed, body weight loss of 25 to 30 % has been advocated to optimize post moult performance (Sohail et al, 2011).…”

Section: Trend In Performance Of Hens During the Moulting Phasesupporting

confidence: 93%

“…Induced moulting rejuvenates the hen's reproductive organs and improves the post-moult performance of the flock in livability, egg production, and egg quality compared to the immediate pre-moult performance (Holt, 2003;Webster, 2003). Programmes used to induce moulting in laying hens include feed deprivation, photoperiod reduction, mineral (Ca, Cu, Zn, Al, etc) supplementation and the use of low energy diets (Molino et. al., 2009;Santos et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Response of domestic chickens to fasting and non-fast moulting programmes in a humid tropical environment

Ogbu

Ndifereke

Ogbu

et al. 2020

NJAP

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The study evaluates the effect of fasting and non-fasting (Zn supplementation) moulting methods on performance of indigenous (IC) and Shaver brown (SB) hens in the hot humid tropical environment of Nsukka, Southeastern Nigeria. One hundred and twenty indigenous and Shaver brown hens (60/genotype) aged between 75 and 80 weeks were shared into three groups (20/group), T : hens fed layers diet at 125 g/bird/day (control group), T : hens fed 1 2layers mash supplemented with 20,000ppm Zn as ZnO at 125 g/bird/day for 14 days, and T : 3 hens subjected to feed deprivation (FD) for 14 days. Water was given ad libitum to all birds. Data analyzed were pre-moult and moulting body weight, hen day egg production (HDEP), and egg weight. Moulting method significantly (p<0.05) affected body weight in SB but not in indigenous hens; hen day egg production and day to stoppage of egg production in bothgenotypes with FD resulting in greater loss in body weight and an early cessation of egg production compared to zinc supplementation. Shaver Brown hens subjected to ZnO and FD lost 15.6 and 26.7 % of their initial body weight, respectively while IC lost 16.2 and 32.6 %, respectively. Hen day egg production was 0.00 ± 0.00 % in the last week of moulting in SB and IC moulted by FD but 8.32 ± 6.47 % for SB and 10.71 ± 3.25 % for IC moulted by ZnO. Egg production stopped on day 10 (D10) and 6 in SB hens submitted to ZnO and FD, respectively and on D13 and 5, respectively for the IC. In conclusion, zinc supplementation at 20,000ppm in the diet of laying chickens as moulting agent is a milder but equally effective moulting method as fasting and is recommended for intensive commercial and rural indigenous poultry production.

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“…The practice of forced molting to extend the longevity of laying hens has been widely studied and several methods have showed effective results in term of egg quality and quantity (Berry, 2003;Molino et al, 2009;Aygun, 2013). However, there a few studies with quails.…”

Section: Introductionmentioning

confidence: 99%

Experimental infection of Salmonella Enteritidis in quails submitted to forced molting by feed fasting

Santos

Teixeira²,

Lopes³

et al. 2015

Rev. Bras. Cienc. Avic.

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This study aimed at evaluating bacterial shedding, as detected in swabs, feces, and eggs of quails submitted to forced molting by feed fasting and experimentally infected with a Salmonella Enteritidis (SE) strain. In the experiment, 84 40-week-old Italian female quails were distributed in the following groups: FI (quails induced to molt by fasting and inoculated with Salmonella Enteritidis -SE); CI (quails fed with a laying diet and inoculated with SE); FNI (quails induced to molt by fasting and not inoculated with SE); and CNI (quails fed with a laying feed and not inoculated with SE). Feces, cloacal swabs, and eggs were collected on day 1, 3, 7 and 14 post-inoculation (dpi) and submitted to bacteriological analyses. All samples obtained from cloacal swabs were negative for SE. None of the quails of the non-inoculated groups (FNI and CNI) were positive for SE in the fecal samples. Among the inoculated quails, the FI group presented significantly higher (p< 0.05) SE shedding in the feces on 1 dpi than the CI group. On 4 dpi, no significant difference was observed (p< 0.05) in SE shedding between the inoculated quail groups. On 7 dpi, only the FI group shed SE in the feces, whereas on 14 dpi, none of the groups shed SE. According to the results, we concluded that quails submitted to molting by fasting have higher possibility of shedding SE in the feces.

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The effects of alternative forced-molting methods on the performance and egg quality of commercial layers

Cited by 11 publications

References 6 publications

Methods of feed restriction for molt induction in commercial laying hens

Methods of feed restriction for molt induction in commercial laying hens

Response of domestic chickens to fasting and non-fast moulting programmes in a humid tropical environment

Experimental infection of Salmonella Enteritidis in quails submitted to forced molting by feed fasting

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