Effect of
the different dietary proprietary vitamin–mineral premixes (PVMP) and housing
systems (HS) on physical characteristics and proximate compositions of egg in
the duration of storage (DOS) at the late laying phase were investigated in
this study. Bovan Nera Black pullets (n=240) at week 71 of life were equally
allotted to battery cage (BC) and deep litter (DL) HS. Pullets were further
allotted in each HS to five dietary treatments. Each treatment was in
triplicate of eight birds. The isocaloric and isonitrogenous diet formulated
was supplemented with one of the five PVMP. Eggs (n=75) were sampled from each
HS and stored at ambient conditions (temperature: 27.1-32.8°C and relative
humidity: 41-76%). Egg indices were assessed at days 0, 7, 14, 21 and 28. The
trial was a '2 × 5 × 5' factorial arrangement in a completely randomized
design. Effect of HS on weight, length, width, Haugh unit, yolk height, shape
index and weight loss of eggs was not significant (p>0.05). Yolk index of
eggs from hens fed diet containing PVMP 1 group (20.41±2.73) and 4 group
(20.53±2.42) differed significantly (p<0.05) from those on supplemental PVMP
2 group (18.49 ± 2.43), 3 group (19.66 ± 2.64) and 5 group (20.02 ± 2.64). Eggs
weight reduced with increased DOS. Ether extract and ash of eggs from hens in
DL were significantly higher (p<0.05) compared to those from BC while crude
protein in egg from BC was significantly higher (p<0.05) than those from DL.
Interactions of BC, PVMP and DOS on egg weight, shell weight, shell thickness
and weight loss differed, significantly (p˂0.05). Relationships of yolk index
and moisture content relative to DOS were negative (R² = 0.908 and R² = 0.631,
respectively) and highly significant (p<0.01). Egg qualities were affected
by the different HS, dietary PVMP used in layer diets as well as the eggs DOS.
Vitamin-mineral premixes Egg quality characteristics Days of storage
Birincil Dil | İngilizce |
---|---|
Bölüm | Araştırma Makalesi |
Yazarlar | |
Yayımlanma Tarihi | 25 Aralık 2018 |
Yayımlandığı Sayı | Yıl 2018 Cilt: 15 Sayı: 2 |
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Print ISSN:1302-3209 - Online ISSN:2147-9003
Journal of Poultry Research is indexed by the following national and international scientific indexing services