Effects of Age of Bird and Season of the Year on Egg Quality 1. Shell Quality

Izat, A. L.; Gardner, F. A.; Mellor, David B.

doi:10.3382/ps.0641900

Cited by 18 publications

(11 citation statements)

References 11 publications

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“…The observed changes in performance and shell quality with age are in accord with earlier ndings (Hurnik et al, 1977;Roland, 1979;Izat et al, 1985). Production per d and ST decreased, while BW and EW increased progressively with age.…”

Section: Effect Of Agesupporting

confidence: 89%

“…These and other ndings suggested that prelaying diets may contain the same calcium content as the laying diets. However, this and other publications (Hurnik et al, 1977;Roland, 1979;Izat et al, 1985) lack suf cient details to allow a judgement to be made on the difference in effects of feeding prelaying diets containing 20 and 35 to 40 g calcium/kg; the response of hens beginning to lay early and those beginning to lay late; and information on possible delayed responses at ages greater than 60 weeks.…”

Section: Introductionmentioning

confidence: 97%

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Effects of age at onset of production, light regime and dietary calcium on performance, eggshell traits, duodenal calbindin and cholecalciferol metabolism

Bär

Vax²,

Striem³

1998

British Poultry Science

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1. Rate of production and shell thickness (ST) decreased, while body weight (BW), egg weight (EW) and percentage breakage increased progressively with age. Shell weight (SW) increased until 8 to 13 months of age and then decreased. 2. Early onset of production resulted in lower BW and EW at the onset of production, and lower pooled averages of BW, EW, SW and ST, as compared with late or medial onset of production. In 4 out of 5 trials, early onset did not result in the production of more eggs during the laying period. 3. Early onset of production is associated with physiological Ca deficiency as indicated by increases in kidney-1-hydroxylase and duodenal calbindin in early layers as compared with late layers. Early layers exhibited a more severe reduction in shell quality as the result of Ca deficiency as compared with late layers. 4. Feeding pullets with a prelaying diet containing 3.9% Ca did not affect unequivocally the performance or shell quality during the whole productive period, whether the birds started to lay early or late. The dietary treatment did not cause renal damage, as indicated by morphological examination and by plasma calcium and uric acid concentration.

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Section: Effect Of Agesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 97%

Effects of age at onset of production, light regime and dietary calcium on performance, eggshell traits, duodenal calbindin and cholecalciferol metabolism

Bär

Vax²,

Striem³

1998

British Poultry Science

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“…Many researchers have raported significant genotype differences related to egg weight (Monira et al, 2003;Аnderson et al, 2004). Egg weight per unit area (Arad and Mader, 1982;Izat et al, 1985) declined with increasing age of hens, but at the same time egg size increased (Sauter et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

The influence of strain and age on some egg quality parameters of commercial laying hens

2011

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The experiment was conducted to evaluate the influence of strain and age on some egg quality parameters (egg weight and egg shell strength) of commercial laying hens. Layers of lines ISA Brown and DeKalb White were examined in period of nine months. Both lines were at same age (28 weeks) and were confined in common facility in battery cages. Laying hens were reared and fed according to standard breeding technology. Once a month 25 eggs of each line were taken to be examined for eggshell strength and egg weight, or in other words, total 450 table eggs were tested. Analises were done in Laboratory for testing egg quality by gaudges Egg Multi Tester EMT 5200 and Egg shell Gauge (Robotmation Co. Ltd., Tokyo, Japan) which have computerised equipment to examine quality and physical characteristics of eggs. Statistic analyses on results were done by computer sub-programme ANOVA and Fisher's LSD test to determine the level of statistical significant difference between examined factors. Egg weight was under significant impact of age (P ? 0,05), but not under the influence of strain, although eggs of ISA Brown line were insignificantly heavier than eggs of DeKalb White line. Eggs were heaviest at layers with older age, while they were lightest at younger birds. The results have shown significant differences (P ? 0,05) in eggshell strength compared to line influence (genotype) and months of age. Eggs from ISA Brown laying hens had much better and eggshell strength than those eggs from DeKalb White. Correlations between eggshell strength and egg weight were with significant (R < 0,05) negative value, which indicating that with increasing egg weight decreases of eggshell strength.

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“…pH kuning dan putih telur. Pengukuran pH dilakukan menurut Iza et al (1985). pH telur dihitung dengan mencelupkan ujung elektroda pH meter pada putih telur yang telah dipecah dan pada kuning telur yang telah dilarutkan dalam aquades.…”

Section: Metodeunclassified

Kualitas Fisik Telur Asin Itik Pegagan Yang Diproses Dengan Menggunakan Abu Pelapah Kelapa Sawit Dan Asap Cair

Yosi¹

2016

BuletinPeternak

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INTISARIAsap cair merupakan bahan yang bermanfaat untuk digunakan dalam proses pengawetan telur. Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan abu pelepah sawit dan asap cair dalam proses pengasinan terhadap kuaitas fisik telur itik pegagan. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) pola searah yang terdiri atas 5 perlakuan dan 4 ulangan dengan setiap ulangan terdiri 5 butir. Perbedaan mean diuji dengan Duncan Multiple Ranges Test. Perlakuan terdiri atas R0, R1, R2, R3, dan R4, di mana seluruhnya menggunakan abu pelepah kelapa sawit dan garam dapur (1:0,25) serta masing-masing ditambahkan larutan asap cair secara berurutan 0% (kontrol), 2,5%, 5%, 7,5%, dan 10% (v/v). Variabel yang diamati adalah kualitas fisik telur asin, meliputi susut bobot telur, berat kuning telur, berat putih telur, indeks kuning telur, indeks putih telur, berat kerabang telur, tebal kerabang telur, kedalaman rongga udara, warna kuning telur, pH kuning telur, pH putih telur, haugh unit (HU), viskositas putih telur. Hasil penelitian menunjukkan bahwa penggunaan abu pelepah kelapa sawit dan asap cair dalam proses pengasinan berpengaruh nyata (P<0,05) terhadap tebal kerabang telur, kedalaman rongga udara, berat putih telur, berat kerabang telur, pH putih telur, indeks putih telur, haugh unit (HU), viskositas putih telur, dan susut bobot telur, akan tetapi berpengaruh tidak nyata (P>0.05) terhadap warna kuning telur, pH kuning telur, berat kuning telur, dan indeks kuning telur. Kesimpulan penelitian adalah penggunaan abu pelepah kelapa sawit dan asap cair dalam proses pengasinan dapat mempertahankan kualitas fisik telur asin itik pegagan.(Kata kunci: Abu pelepah kelapa sawit, Asap cair, Kualitas fisik, Telur itik pegagan) R0, R1, R2, R3, and R4, where all of treatments used palm oil fronds ash and salt (1:0.25) and each treatment was added liquid smoke 0% (control), 2,5%, 5,0%, 7,5%, and 10% (v/v) ABSTRACT Liquid smoke is a useful material for use in the process of preserving eggs. The purpose of this study was to determine the effect for use of palm oil fronds ash and liquid smoke in the process of salting to the physical quality of pegagan duck's egg. This study was assingned in a Completely Randomized Design, which consists of 5 treatments and 4 replications. Each replicatation used as much as 5 eggs. The treatment consists of

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Effects of Age of Bird and Season of the Year on Egg Quality 1. Shell Quality

Cited by 18 publications

References 11 publications

Effects of age at onset of production, light regime and dietary calcium on performance, eggshell traits, duodenal calbindin and cholecalciferol metabolism

Effects of age at onset of production, light regime and dietary calcium on performance, eggshell traits, duodenal calbindin and cholecalciferol metabolism

The influence of strain and age on some egg quality parameters of commercial laying hens

Kualitas Fisik Telur Asin Itik Pegagan Yang Diproses Dengan Menggunakan Abu Pelapah Kelapa Sawit Dan Asap Cair

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