scholarly journals Effects of feeding regimen, fiber inclusion, and crude protein content of the diet on performance and egg quality and hatchability of eggs of broiler breeder hens

2012 ◽  
Vol 91 (12) ◽  
pp. 3097-3106 ◽  
Author(s):  
M. Mohiti-Asli ◽  
M. Shivazad ◽  
M. Zaghari ◽  
M. Rezaian ◽  
S. Aminzadeh ◽  
...  
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Egg Quality ◽  
Crude Protein Content ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Broiler Breeder Hens ◽  
Feeding Regimen

scholarly journals Dietary fibers and crude protein content alleviate hepatic fat deposition and obesity in broiler breeder hens

2012 ◽  
Vol 91 (12) ◽  
pp. 3107-3114 ◽  
Author(s):  
M. Mohiti-Asli ◽  
M. Shivazad ◽  
M. Zaghari ◽  
S. Aminzadeh ◽  
M. Rezaian ◽  
...  
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Fat Deposition ◽  
Crude Protein Content ◽  
Dietary Fibers ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Hepatic Fat ◽  
Broiler Breeder Hens

scholarly journals Laying pattern parameters in broiler breeder hens and intrasequence changes in egg composition

2010 ◽  
Vol 55 (No. 10) ◽  
pp. 428-435 ◽  
Author(s):  
M. Gumulka ◽  
E. Kapkowska ◽  
D. Maj
Keyword(s):  
Egg Quality ◽  
Shape Index ◽  
Sequence Length ◽  
Broiler Breeder ◽  
Weight Percentage ◽  
Breeder Hens ◽  
Dark Regime ◽  
Broiler Breeder Hens ◽  
Egg Components ◽  
Production Period

The aim of the study was to analyze the pattern of oviposition time in laying sequences in broiler breeder hens and to determine a relationship between egg position in the sequence and egg quality. The sequences were described using mean oviposition time (hour) within a sequence, mean lag of oviposition time between successive ovipositions, and mean and cumulative lag of oviposition for a sequence. Egg weight, percentage of egg components and shape index were determined for successive eggs in a sequence. The 2-, 3-, 4-, 5- to 6- and 7- to 9-egg sequences were considered. The light/dark regime was 16 h/8 h (05:00 a.m. to 09:00 p.m.). Hens laid the first egg in a sequence about 3.5 h after the beginning of the photoperiod. With increasing sequence length, the first egg was laid sooner after the beginning of the photoperiod and the intervals between successive ovipositions shortened. This suggests that when planning the frequency of egg collection in a flock of broiler breeder hens, one should account for changes in the egg sequence length during the production period. No significant relationship between egg position in the sequence and quality of egg components was observed.

scholarly journals Rearing system, utility type and hens’ age as a factor modifying lysozyme's hydrolytic activity

2021 ◽  
Vol 17 (2) ◽  
pp. 1-12
Author(s):  
Karolina Wengerska ◽  
Damian Spustek ◽  
Dominika Krakowiak ◽  
Kamil Drabik ◽  
Justyna Batkowska
Keyword(s):  
Egg Quality ◽  
Hydrolytic Activity ◽  
Quality Traits ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Broiler Breeder Hens ◽  
Egg Albumen ◽  
Parent Stock ◽  
The Impact ◽  
Eggs Quality

<b>The aim of study was to analyze the impact of the utility type, age and rearing system of hens on egg quality traits and the enzymatic activity of egg albumen lysozyme (LA). The material consisted of 120 eggs from two genotypes of hens: Hy-Line Brown and parent stock of Ross 308. Laying-type hens were reared divided into 2 systems: intensive (litter, balanced feed) and extensive (open runs, farm fodders). The second source of material was hens age (29, 33, 41, 53 and 70 wks) of the parent stock.. Stocks were differentiated in terms of the hens age (29, 33, 41, 53 and 70 wks). Eggs quality traits and LA were evaluated. The LA of was higher in eggs from laying than from broiler breeder hens. It decreased with the hens’ age and increased with albumen mass, it was also positively correlated with albumen height and Haugh's units. The rearing system considerably modified mass of egg and albumen and the dense albumen height, but does not affect the LA.

PELLETED COMPLETE GROWER–FINISHER RATIONS FOR LAMBS

1978 ◽  
Vol 58 (4) ◽  
pp. 571-577
Author(s):  
R. S. BUSH ◽  
J. W. G. NICHOLSON ◽  
T. M. MACINTYRE
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
The Other ◽  
Crude Protein Content ◽  
Economic Basis ◽  
Lower Protein ◽  
Feeding Regimen ◽  
Dressing Percentage ◽  
Dairy Heifer ◽  
Dietary Treatments

Duplicate groups of 10 lambs were assigned to each of four dietary treatments. These were (1) pelleted complete feed containing 13% crude protein, (2) pelleted complete feed containing 15% crude protein, (3) mash concentrate containing 13% crude protein to be fed with long timothy hay, and (4) pelleted complete feed formulated to meet the requirements of the growing dairy heifer. The lambs weighed an average of 17.3 and 23.4 kg in the two replicates at the beginning of the experiment and were slaughtered between 41 and 45 kg. Lambs consuming the lower protein complete feed had greater average daily gains and required fewer days to reach market weight than did those consuming concentrate plus long hay. There were no significant differences in the performance of lambs fed the two pelleted complete lamb rations (1 and 2). The pelleted complete heifer ration (4) produced similar average daily gains to the concentrate plus long hay feeding regimen; however, more feed was required to maintain that growth. There were no differences in carcass grade and no significant differences in rib-eye area or fat cover at the pinbone cut. Those lambs consuming the heifer growth had a lower dressing percentage than did any of the other three groups. It was concluded that pelleted complete rations are advantageous in a fattening lamb program both on performance and economic basis and that there was no advantage to increasing the crude protein content of the pelleted complete ration from 13 to 15%.

Effect of acute heat stress on the physiological and reproductive parameters of broiler breeder hens – A study under controlled thermal stress

2019 ◽  
Author(s):  
P.B. Aswathi ◽  
S.K. Bhanja ◽  
Puneet Kumar ◽  
T.S. Shyamkumar ◽  
Manish Mehra ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Egg Quality ◽  
Body Weight Gain ◽  
Heat Exposure ◽  
Quality Parameters ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Heat Treated ◽  
Acute Heat Stress ◽  
Broiler Breeder Hens

A study was conducted to find out the effect of thermal stress on the physiological as well as reproductive performances of broiler breeder hens. The birds were exposed to 37±1°C and RH 70% for 6 hours daily for a period of 10 days in the psychrometric chamber (THI >90). In the heat exposed group, body weight gain and feed intake (P lee than 0.05) were negatively affected, whereas water consumption and water:feed intake ratio were much higher during the period of study. Even after 12hrs of heat exposure, surface temperature of feathered regions; neck and back were significantly high (P less than 0.05). The serum cholesterol level in heat treated birds was increasing (P less than 0.05), whereas calcium and phosphorus levelswere showing lower values (P less than 0.05) on the 3rd and 10th day of study. A significant change in serum protein or glucose could not be observed. The reduction in HDEP and internal egg quality parameters like albumen index, Haugh unit score, yolk index etc. were observed in heat exposed hens (P less than 0.01). Higher incidence of blood spots were also noted in eggs laid by heat treated birds. In the present study, it can be concluded that thermal stress at THI>90 for at least 6hrs/day can impart serious damage to various physiological and reproductive performances in broiler breeder hens.

scholarly journals Phytase in diets with crude protein levels for commercial layers

2017 ◽  
Vol 39 (2) ◽  
pp. 163
Author(s):  
Adriana Aparecida Pereira ◽  
Otto Mack Junqueira ◽  
Dirceu Neutzling Griep Junior ◽  
Dorgival Morais de Lima Júnior ◽  
Sarah Sgavioli ◽  
...  
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Egg Production ◽  
Egg Quality ◽  
Crude Protein Content ◽  
Feed Conversion ◽  
Egg Weight ◽  
Protein Levels ◽  
Randomized Design ◽  
And Performance

 The aim of this study was to evaluate the action of the phytase enzyme in diets formulated with variations in the crude protein content on performance and egg quality of commercial layers. A total of 336 commercial layers were housed at eight birds per cage in a 3 × 2 factorial arrangement with seven replicates. Treatments consisted of four crude-protein levels (17, 15, and 13%) and two enzyme levels (0 and 500 FTU kg-1 diet), distributed in a completely randomized design. Feed intake, egg production, feed conversion per dozen eggs and per kilogram, egg weight and mass, specific gravity, eggshell thickness, and Haugh unit were measured over five 28-day periods. The performance of commercial layers fed the diet containing 13% crude protein worsened, irrespective of phytase addition. However, at 15% crude protein, phytase inclusion did not affect feed conversion or egg weight. Inclusion of phytase leads to equal egg-quality and performance results at the dietary crude protein levels of 17 and 15%. The crude protein content of 13%, with or without phytase, is not recommended for the diet of brown-egg layers. 

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