oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Lipid Composition of Egg Yolk and Serum in Laying Hens Fed Diets Containing Black Cumin (Nigella sativa)  [PDF]
Nabiela M. El Bagir,Aziza Y. Hama,Rania M. Hamed,Ahmed G. Abd El Rahim
International Journal of Poultry Science , 2006,
Abstract: Laying hens were fed diets without or with 10 or 30 g of the whole seed of black cumin (Nigella sativa)/kg. The concentrations of total lipids, total cholesterol, phospholipids and triacylglycerols in serum and egg yolk were measured. Feeding of the diets with 1 and 3% black cumin seeds for a period of three months reduced egg yolk total cholesterol by 34 and 42%, respectively. Serum cholesterol concentrations averaged for the whole feeding period were lowered by 15 and 23% after feeding the diets with 1 and 3% black cumin seeds, respectively. Black cumin seeds in the diet of laying hens also caused a lowering of serum and egg-yolk concentrations of triacylglycerols and phospholipids. Inclusion of black cumin seeds in the diet caused a significant reduction in egg production, without any effect on egg width and length, while there was a significant increase in hen`s body weight. The increase in body weight in the hens fed black cumin seeds is explained by the ingested feed energy not used for egg production. It is concluded that black cumin seeds and/or the active principle are of interest as potential egg-yolk cholesterol-lowering agents.
Influence of Zeolite on fatty acid composition and egg quality in Tunisian Laying Hens
Imen Fendri, Lamia Khannous, Zouhir Mallek, Al Ibrahim Traore, Neji Gharsallah, Radhouane Gdoura
Lipids in Health and Disease , 2012, DOI: 10.1186/1476-511x-11-71
Abstract: Zeolite (Clinoptilolites) was added to Laying Hens feed at concentrations 1% or 2% and was evaluated for its effects on performance of the production and on egg quality. The Laying Hens were given access to 110?g of feed mixtures daily that was either a basal diet or a ‘zeolite diet’ (the basal diet supplemented with clinoptilolite at a level of 1% or 2%). It was found that zeolite treatment had a positive and significatif (p?<?0.05) effect on some parameters that were measured like egg height and eggshell strength. While dietary zeolite supplementation tended to/or has no significant effects on total egg, eggshell, yolk and albumen weights. It was found also that zeolite mainly increases level of polyunsaturated fatty acids in egg.This study showed the significance of using zeolite, as a feed additive for Laying Hens, as part of a comprehensive program to control egg quality and to increase level of polyunsaturated fatty acids on egg.
Effect of Dietary Inclusion of Cassava Yeast as Probiotic Source on Egg Production and Egg Quality of Laying Hens  [PDF]
Songsak Chumpawadee,Anut Chantiratikul,Suwannee Sataweesuk
International Journal of Poultry Science , 2009,
Abstract: The study was conducted to investigate the effect of dietary inclusion of cassava yeast as a probiotic source on laying hens performance and egg quality. Two hundred and sixteen Roman breed laying hens (26 week of age), were used. The laying hens were randomly allocated to 24 pens containing 9 laying hens each with 6 replicates and assigned to receive one of 4 dietary treatments (1. Control, 2. S. cerevisae 1x106 organisms/kg, 3. S. cerevisiae 1x107 organisms/kg, 4. S. cerevisiae 1x108 organisms/kg) in a completely randomized design. The results showed that feed intake, feed conversion efficiency, albumin weight, yolk weight and haugh unit were not significantly different among treatments (p>0.05). Significant differences were observed in egg production, egg weigh and shell thickness. Cassava yeast as probiotic source had positive effect on egg weigh and shell thickness, but has negative effect on egg production. The results of the present experiment showed that dietary inclusion of cassava yeast as a probiotic to laying hens seems to have minimal influence on laying hens performance.
Effects of Bacteriocin-Like Substance on Performances and Egg Quality of Laying Hens
Yaoqi Guo,Guang Jia,Zhanqiao Yu,Rijun Zhang
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.2276.2279
Abstract: Feed supplements had been widely studied for improvement of egg quality. The effects of Bacteriocin-Like Substance (BLS), an antimicrobial peptide produced by a new Bacillus licheniformis strain, on performances and egg quality of laying hens were evaluated here. About 150 Hy-Line Brown laying hens which were 32 weeks old were randomly divided into five groups with 5 replicates (6 birds per replicate). Four groups were fed different concentrations of bacteriocin-like substances (500, 1500, 2500 and 3500 AU kg-1 basic dietary, respectively) whereas the group fed basic diet was served as control. After experiment, groups fed BLS had a higher egg production without significance comparing to control. There were also no significant differences between control and trial groups, in terms of feed to egg ratio, egg weight, egg shell thickness, egg shell strength, egg shape index and Haugh unit. However, groups supplemented with BLS exhibited significant higher yolk color (p<0.01) and lower ratio of blood spots eggs.
Effect of rearing system and season on the performance and egg characteristics of Ancona laying hens  [cached]
Cecilia Mugnai,Alessandro Dal Bosco,Cesare Castellini
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2009.175
Abstract: Productive performance and egg characteristics of Ancona laying hens reared under three different rearing systems (conventional, organic and organic-plus) were compared during an experimental period of one year. Three-hundred-sixty Ancona female chicks at 28 days of age were divided in three groups and assigned to different rearing systems. The organic group had 4m2 pasture/hen according to the requirements imposed by the EC Regulation 1804/99, whereas the organic-plus group had a larger grass paddock (10m2/hen). The Control group was reared in cages under standard housing conditions. The following egg characteristics were recorded and analysed during the year-long cycle: egg weight and egg mass laid/d, weight of egg components, shell thickness, Haugh index and yolk colour. Egg quality was affected by the pasture available. The hens that ingested grass (organic-plus), produced eggs with higher shell weight and percentage, darker yolk colour and higher α-tocopherol, carotenoid and polyphenol contents. The other egg traits were not affected by rearing system.
Effects of Fat Type on Performance, Some Egg Charecteristics and Egg Yolk Cholesterols of Laying Hens
Suleyman Calislar,Ali Kirik
Journal of Animal and Veterinary Advances , 2012,
Abstract: The objective of this experiment was to determine the effect of fat type on hen performance, cholesterol level and some egg charecteristics. A total number of 75 Lohman white layers, with 36 week old weeks of age at the beginning of the experiment, was distributed in a completely randomized experimental desing into five treatments, with three replicates of 5 hens each. Fat type had no significant (p>0.05) effect on Final Body Weight (FBW), Feed Intake (FI) and Feed Conversion Ratio (FCR) of laying hens. The FBW of laying hens at the end of experiment ranged from 1586.67±21.53-1623.33±27.21 g. The FI and FCR of laying hens ranged from 124.48±0.29-126.66±0.11 and 2.14±0.02-2.28±0.04, respectively. The fat type also had no significant (p>0.05) effect on the external egg charecteristics. The egg weigth and shell weight ranged from 60.07-63.55 and 7.62-7.96 g, respectively. The egg shape index ranged from 74.00-75.00%. The fat type had significant (p<0.001) effect on the cholesterol level of egg of laying hens. The egg yolk cholesterol level and egg yolk fat content ranged from 211.89-248 mg and 32.87-36.02 g, respectively. Egg yolk cholesterol level and fat content of laying hen fed diet V was significantly (p<0.001) higher than those of laying hen fed other diets. It is likely to manipulate the chlosterol level of egg without changing external and internal egg quality charecteristics.
Interactive Effect of Sodium Bentonite with Pigments on Performance and Egg Quality of Laying Hens
H. Hashemipour,H. Kermanshahi,M. Pilevar
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2010.2179.2184
Abstract: In this experiment sodium bentonite was evaluated for its effect on egg yolk pigmentation and performance when synthetic pigment was added to the diet of laying hens. About 256 Hy-Line W-36 laying hens 35 weeks old were allocated to 8 experimental diets with 4 replicates each. Four levels of sodium bentonite (0.0, 1.0, 2.0 and 3.0%) and 2 levels of synthetic pigment (0.0 and 0.04%) were used for the 12 week experiment with a 4x2 factorial arrangement and a completely randomized design. Pigment was supplied by 20 g of lucantin and 20 g of xanthin that were diluted with 9960 g wheat bran. About 1 week before the experiment, the birds fed dietary treatments for adaptation. The measured records were feed intake, feed conversion ratio, egg production, egg weight, specific gravity, shell percent, shell thickness and yolk color index. The addition of sodium bentonite decreased (p<0.05) the specific gravity and yolk color index compared to the control diet. The addition of pigment significantly increased specific gravity and as expected, increased the yolk color index compared to the control diet.
The Effects of Inclusion Different Levels of Rice Bran in Laying Hens Diets on Performance and Plasma and Egg Yolk Cholesterol Contents
A. Nobakht
Journal of Animal and Veterinary Advances , 2012,
Abstract: This study was designed to evaluate the effects of inclusion different levels of rice bran in laying hens diets on performance and serum and egg yolk cholesterol contents. Two hundred and fifty six Hy-Line strain laying hens, 65-73 weeks of age, were randomly assigned to 4 dietary treatments. The levels of rice bran Inclusion were 0, 5, 7.5 and 10% and fed to laying hens for 8 week. Egg production, feed efficiency and egg mass were significantly affected by inclusion of rice bran in treatments. Whereas egg quality and plasma and egg yolk cholesterol content were not significantly affected (p< 0.05). It was concluded that rice bran can be used as an alternative feedstuff in laying hens diets, at inclusion levels up to 7.5% without negative effects on performance and egg quality.
The Effects of Inclusion Different Levels of Dried Tomato Pomace in Laying Hens Diets on Performance and Plasma and Egg Yolk Cholesterol Contents
A. Nobakht,A.R. Safamehr
Journal of Animal and Veterinary Advances , 2012,
Abstract: This study was designed to evaluate the effects of inclusion different levels of DTP pomace in laying hens diets on performance and serum and egg yolk cholesterol contents. One hundred eighty two Hy-Line strain laying hens, 65-73 weeks of age, were randomly assigned to 4 dietary treatments. The levels of DTP Inclusion were 0, 5, 7.5 and 10% and fed to laying hens for 8 week. Egg production, egg weight, egg mass and eggshell weight were significantly affected by inclusion of DTP in treatments. Whereas serum and egg yolk cholesterol content were not significantly affected (p< 0.05). It was concluded that DTP can be used as an alternative feedstuff in laying hens diets, at inclusion levels up to 10% without negative effects on performance and egg quality.
Effects of Microbial Phytase Supplementation on Feed Consumption and Egg Production of Laying Hens  [PDF]
Mehmet Ciftci,Bestami Dalkilic,M. Ali Azman
International Journal of Poultry Science , 2005,
Abstract: In this study, the effects of microbial phytase supplementation in diets were investigated on feed intake, egg production and feed efficiency in laying hens. The experiment was carried out between the July 15th to October 15th. 120 Nick Chick White hens at 210 days of age were divided into four groups of 40 each. Each cage contained 5 hens. Treatment groups were fed the basal diet (Control Group) or the basal diet supplemented with 300 U/kg of microbial phytase (Group A) and 600 U/kg of microbial phytase (Group B). Birds in each group were fed a balanced diet ad libitum. Daily feed intake, feed efficiency, egg production and egg weight differed between treatment groups (P< 0.01). However initial and final body weights were similar in all groups. It can be concluded that supplementation of microbial phytase to diets improved hen productivity.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.