Effects of Forced Molt Period on Postmolt Performance of Leghorn Hens

An experiment was conducted to determine the effects of hen BW before molt and the percentage of BW loss during molt on the subsequent performance and profitability of hens during the second cycle of production. Results revealed that profits associated with Light hens (≤1,453 g, or 3.2 lb) were from 1.8¢ to 3.8¢/dozen eggs higher than those associated with Heavy hens (≥1,589 g, or 3.5 lb). Profits of Nonselected hens (ranging from 1,090 to 2,134 g, or 2.4 to 4.7 lb) were intermediate, ranging from 1.2¢ to 2.5¢/dozen higher than profits of Heavy hens. The increased profitability of Light hens was largely due to their improved feed conversion. Because Light hens produced predominantly Large and Extra Large eggs, the price spread between Medium and Large eggs had little impact on profits. Although not as pronounced as the effect of premolt BW, profits associated with Heavy hens that underwent a 35% reduction in BW during molt were from 0.8¢ to 1.5¢/dozen higher than those from Heavy hens with a 25% BW reduction. Reducing the BW of Light hens by 35% had no observable adverse effects in this study.

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“…production rates associated with molted secondcycle hens are higher than those of nonmolted hens of the same age [2, 4,7].…”

mentioning

confidence: 99%

Performance and profitability of second-cycle laying hens as influenced by body weight and body weight reduction during molt

Gordon¹,

Bryant

Roland

2009

Journal of Applied Poultry Research

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“…Egg output was less when body weight losses of either less than 65% or greater than 80% occurred. Lee (1982) also compared different periods of food restriction, but found they had no significant effect on post-moult egg production. However the three periods he tested (3, 5 and 7 weeks following 7 d of food withdrawal resulted in body weight reductions of only 89, 85 and 91% of initial body weight respectively.…”

Section: Discussionmentioning

confidence: 96%

“…Previous investigations indicated that varying the duration of induced moults altered shell strength (Baker et al 1982, Lee, 1982. The moulting procedures we compared may have all allowed for an optimum or equal regression and regeneration of the uterus and so no differences in egg shell quality were obtained.…”

Section: Discussionmentioning

confidence: 97%

Fatness of laying hens and induced moulting regimens

Rose¹,

Campbell²

1986

British Poultry Science

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1. A flock of laying hens was divided into two groups according to their fatness, which was estimated using abdominal fatness callipers. 2. A moult was induced in both groups by reducing day-length and restricting food intake. The food restriction period lasted for 2, 3 or 4 weeks and the birds were given either 15 or 25 g of whole wheat/bird. 3. No differences were observed between the moulting treatments on post-moult egg weights, shell strength or Haugh units, but maximum egg output (g/bird d) was obtained by the 4-week food restriction period for the fat-grouped birds but by the 3-week food restriction for the lean-grouped birds. 4. The birds restricted to 15 g wheat/bird d showed a more rapid regression of the ovary and oviduct, which may account for their increased egg numbers towards the end of the 22-week laying period compared to the birds allocated 25 g/bird d.

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“…Kehilangan berat badan itik yang tidak mendapat perlakuan pemuasaan P0 hanya mendapat perlakuan pembatasan ransum selama 20 hari mengalami kehilangan berat badan 16,52 % sedangkan yang mendapat perlakuan pemuasaan 12 hari adalah yang paling besar mencapai 28,44 %. Menurut Lee (1982) lamanya force molting pada unggas dapat mempengaruhi tingkat penurunan berat badan, dan pemuasaan yang lebih lama akan menurunkan berat badan lebih besar dibanding pemuasaan yang lebih singkat.…”

Section: Materi Dan Metodeunclassified

Performans Produksi Telur Itik Talang Benih pada Fase Produksi Kedua Melalui Force Moulting

Kususiah

Desia

Haryono

2015

JSPI.ID

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An experiment was arranged to evaluate egg production performance of Talang Benih ducks in the second phase, after one year production period. A total of 192 female ducks with production level being less than 30% were distributed into 16 cages, 12 ducks each. Four force molting treatments (fasting 4, 8, or 12 days followed by limited feed for 20 days, and limited feed for 20 days control) were arranged in a Randomized Complete Design with four replications. During fasting water was provided at libitum. Performances observed were weight loss, time to start laying egg, egg production percentage, single egg weight, and feed consumption. The results showed that fastings before feed limitation did not improve egg production of ducks than those treated with limited feed only; even the longer the fasting period the worse egg production was.Key words: Talang Benih ducks, second peiod of egg production, force molting. ABSTRAKPenelitian dirancang untuk mengevaluasi performans produksi telur itik Talang Benih pada fase produksi ke dua setelah melalui masa produksi telur selama satu tahun produksi pertama. Sebanyak 192 ekor itik Talang Benih betina dengan persentase produksi yang telah menurun dibawah 30 % didistribusikan ke dalam 16 petak kandang perlakuan dengan 12 ekor per petak kandang. Rancangan yang digunakan adalah rancangan acak lengkap 4 perlakuan force molting dengan 4 ulangan. P0 sebagai kontrol, itik tidak dipuasakan dan hanya mendapat pembatasan ransum selama 20 hari, P4 dipuasakan selama 4 hari dilanjudkan pembatasan ransum selama 20 hari, P8 dipuasakan 8 hari dilanjutkan pembatasan ransum selama 20 hari , dan P12 dipuasakan selama 12 hari dilanjutkan pembatasan ransum selama 20 hari. Selama pemuasaan itik diberi air minum ad libitum. Peubah yang diukur meliputi : kehilangan berat badan, waktu mulai bertelur kembali, persentase produksi telur, berat telur per butir, dan konsumsi ransum. Dapat disimpulkan bahwa performans produksi telur itik Talang Benih pada fase produksi ke dua yang mendapat perlakuan force molting pemuasan 4, 8, dan 12 hari dilanjutkan pembatasan ransum selama 20 hari tidak lebih baik dibanding dengan kontrol yang hanya mendapat perlakuan pembatasan ransum selama 20 hari.

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Effects of Forced Molt Period on Postmolt Performance of Leghorn Hens

Cited by 56 publications

References 9 publications

Performance and profitability of second-cycle laying hens as influenced by body weight and body weight reduction during molt

Performance and profitability of second-cycle laying hens as influenced by body weight and body weight reduction during molt

Fatness of laying hens and induced moulting regimens

Performans Produksi Telur Itik Talang Benih pada Fase Produksi Kedua Melalui Force Moulting

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