Effects of Molt-induction Period on Induction of Molt and Post-molt Performance in Laying Hens

Soe, Hnin Yi; Yayota, Masato; Ohtani, Shigeru

doi:10.2141/jpsa.46.203

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…One of the current concerns is the welfare of layers submitted to complete feed withdrawal to induce molting in order to obtain a second laying cycle. Several alternative methods have been proposed (McReynolds et al 2006;Donalson et al 2005;Landers et al 2005a;Landers et al 2005b;Soe et al 2007;Soe et al 2009). In the present study, the effectiveness two non-feed withdrawal methods (feeding alfalfa meal and barley grain), as alternatives to the conventional method, was investigated.…”

Section: Discussionmentioning

confidence: 99%

Applicability of Non-Feed Removal Programs to Induce Molting Instead of the Conventional Feed Withdrawal Method in Brown Laying Hens

Sarıözkan

Kara

Güçlü

2016

Rev. Bras. Cienc. Avic.

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This study was conducted to compare the applicability of non-feed removal (NFR) programs to induce molting in brown laying hens by feedusing alfalfa meal and barley grain on molting of instead of feed withdrawal in terms of performance, egg quality and profitability. A total of 240, 75-week-old Hy-Line brown laying hens were randomly divided into three groups as conventional feed withdrawal (CONV), and two non-feed removal programs using alfalfa meal (A+F) or barley grain (B+F), each containing 80 hens with 20 replicates (4 hens x 20 replicates = 80 hens). After 10 days of the induced molting the lowest body weight loss (20.01%) was found in the B+F method (p<0.01). In the second cycle, onset of egg production days were significantly different between groups (p<0.001) and hens of NFR groups (A+F and B+F) reached 50% egg production earlier than CONV group (p<0.05). Most of the performance (average egg production, daily feed intake, feed conversion ratio and mortality) and egg quality parameters (egg weight, specific gravity, shell thickness and breakage) of NFR groups were similar to the CONV group (p>0.05). Haugh unit of CONV group was better than NFR groups, whereas molting by NFR groups improved egg yolk color (p<0.001). Despite higher feed cost of NFR programs, egg income and profit was better than CONV group (p<0.001). In conclusion, molting with alfalfa meal and barley grain of brown layers may be used as non-feed removal programs, without negative effects on the performance and egg quality parameters. Besides, these nonfeed removal programs have higher income and profitability.

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Section: Discussionmentioning

confidence: 99%

Applicability of Non-Feed Removal Programs to Induce Molting Instead of the Conventional Feed Withdrawal Method in Brown Laying Hens

Sarıözkan

Kara

Güçlü

2016

Rev. Bras. Cienc. Avic.

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“…Some reaserchers have found that feed withdrawal can affect the different components of the immune system such as thymus (Brake et al, 1981) and spleen weights . It can also affect differential white blood cell counts mainly by increasing the heterophils and decreasing the lymphocyte number in blood (Soe et al, 2009). Moreover, the moult induced with feed withdrawal is a potential factor escalating structural bone loss in old laying hens.…”

Section: Introductionmentioning

confidence: 99%

Effect of utilization of maize silage in moult inducing diets on performance, immune response and bone quality in laying hens

Ayasi¹,

Dastar²,

Ghoorchi³

et al. 2016

J. Anim. Feed Sci.

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Effects of Hen Age and Force Molting Programs on Body Weight Loss and Heterophil: Lymphocyte Ratio during Molt Period in Laying Hens

Aygün

Yeti̇şi̇r²

2013

IJVMR

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The aim of this study was to determine the effects of hen age and force molting programs on body weight loss, egg production cease and heterophil:lymphocyte ratio during molt period. The experiment was conducted using 320 Hy-Line W36 hens randomly assigned to experimental groups (five replicates of 8 hens for each treatment). The experimental design of the study was a 2 × 4 factorial arrangement of a completely randomized design. Eight treatments were compared in a 2 x 4 factorial arrangement with 2 age treatment (63 and 75 week of age) and 4 force molting treatments [feed withdrawal (FW), 100% alfalfa (A), 50% alfalfa and 50%oat (AO), and 100% oat (O)]). The hen age had no significant effect on BW loss, cease egg production and H: L ratio during molt period. The FW had significantly (P<0.01) higher BW loss than AO and O treatments and it was similar to A treatment. Egg production for all treatments ceased completely by day 6. H: L ratio were significantly higher for FW treatment when compared with nonfeed withdrawal treatments. The results indicated that alfalfa or oat appears to be alternatives to FW methods for force molting.

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Effects of Molt-induction Period on Induction of Molt and Post-molt Performance in Laying Hens

Cited by 3 publications

References 26 publications

Applicability of Non-Feed Removal Programs to Induce Molting Instead of the Conventional Feed Withdrawal Method in Brown Laying Hens

Applicability of Non-Feed Removal Programs to Induce Molting Instead of the Conventional Feed Withdrawal Method in Brown Laying Hens

Effect of utilization of maize silage in moult inducing diets on performance, immune response and bone quality in laying hens

Effects of Hen Age and Force Molting Programs on Body Weight Loss and Heterophil: Lymphocyte Ratio during Molt Period in Laying Hens

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