Hen performance, egg quality, and the sensory evaluation of eggs from SCWL hens fed dietary flax

1994 ◽  
Vol 74 (2) ◽  
pp. 347-353 ◽  
Author(s):  
L. J. Caston ◽  
E. J. Squires ◽  
S. Leeson
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Metabolizable Energy ◽  
Liver Fat ◽  
Flax Seed ◽  
Egg Weight ◽  
Commercial Strain ◽  
Egg Shell ◽  
Single Comb ◽  
Soybean Diet

Two hundred and twenty-five 19-wk-old Single Comb White Leghorn pullets of a commercial strain were fed diets containing either 0, 10 or 20% ground flax seed. Birds fed 20% dietary flax were smaller and ate more feed (P < 0.01). Hen performance in terms of egg production and egg-shell deformation was unaffected by dietary flax throughout the trial. Egg weight followed this trend until period 12, when control-fed hens laid significantly larger eggs (P < 0.01). The metabolizable energy of diets containing 10 and 20% ground flax was significantly less than that of the control corn-soybean diet (P < 0.01). Malondialdehyde levels in the liver of birds fed 20% dietary flax were moderately elevated, although this was not indicative of serious lipid peroxidation. Percentage liver fat was significantly lower in birds fed all levels of dietary flax (P < 0.05). There was a significant increase of N-3 fatty acids, and particularly linolenic acid, in the livers of birds fed all levels of dietary flax. The data from taste-panel studies involving fresh and stored eggs were somewhat inconclusive, although in general there was a slight perception of off-flavour in eggs from flax-fed birds. Key words: Hen performance, egg quality, dietary flax

scholarly journals Effect of protein and energy levels in a constant ratio supplemented with methionine and lysine on performance of layers and on egg quality.

1980 ◽  
Vol 28 (1) ◽  
pp. 29-35
Author(s):  
A.R. El Boushy ◽  
L.G.M. van Gils ◽  
M.C. Papadopoulos
Keyword(s):  
Feed Intake ◽  
Crude Protein ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Energy Levels ◽  
Metabolizable Energy ◽  
Constant Ratio ◽  
Feed Conversion ◽  
Egg Weight

Twenty groups of 36 laying hens in individual cages were fed on one of 5 diets in which the energy:protein ratio was constant. Diets 1 to 5 had crude protein 12.0, 12.9, 14.0, 15.0 and 16.0% and metabolizable energy 8.71, 9.57, 10.27, 11.10 and 11.70 MJ/kg. From 24 to 64 weeks old, egg production of hens given diets 1 to 5 was 71.46, 71.31, 72.51, 71.13 and 69.99%, respectively. Corresponding values of mean egg weight, weekly feed intake and efficiency of feed conversion were 60.51, 60.47, 61.11, 61.02, 61.07 g; 157.16, 147.56, 142.03, 130.37, 126.72 g; 3.674, 3.460, 3.262, 3.031, 3.014 kg feed/kg egg, respectively. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Effects of a short laying rest on postrest egg production and egg quality

1993 ◽  
Vol 2 (5) ◽  
pp. 437-445
Author(s):  
Tuomo Kiiskinen ◽  
Hilkka Hakatie
Keyword(s):  
Mass Production ◽  
Feed Efficiency ◽  
Egg Production ◽  
Egg Quality ◽  
Live Weight ◽  
Egg Mass ◽  
Whole Grain ◽  
Egg Weight ◽  
Egg Shell ◽  
Production Period

Two factorial trials, each including three commercial laying hybrids, were conducted to study the effects of a short laying rest on postrest performance of hens and on egg quality. A total of 1800 hens laying at 65% on an average (70 wks of age) were subjected to one of the following treatments: no rest (control, C) or feeding only whole-grain barley (WB) or fasting (F, Trial 1 only) until the rate oflay dropped to 0%, after which the birds were returned to the previous all-mash diet. The second laying period was six months. Egg production of the WB and F hens ceased within one week on an average and the birds were out of production for 10 days. Laying intensity during the second production period did not differ significantly between the treatments in each trial, but egg weight and daily egg mass production increased as a result of the rest treatments. The laying rest procedures reduced feed intake, improved feed efficiency and increased live weight significantly. Egg shell and albumen quality traits were significantly better in the laying rest groups than in the controls. Significant differences in performance and egg quality between the hybrids were mainly ascertained in Trial 2. The results suggest that a short laying rest is a feasible means of improving egg quality towards the end of the laying period. It can be accomplished successfully by feeding whole-grain barley.

scholarly journals Effect of Ambient Temperature on the Performance of Shaver Brown Hens in Hot Humid Environment

2019 ◽  
pp. 1-10
Author(s):  
A. O. Ani ◽  
M. O. Okpara
Keyword(s):  
Ambient Temperature ◽  
Egg Production ◽  
Shape Index ◽  
Metabolizable Energy ◽  
Effect Of Temperature ◽  
Crude Fibre ◽  
Egg Weight ◽  
Humid Environment ◽  
Egg Shape ◽  
Egg Shell

The effect of temperature on the performance of Shaver brown hens in the hot humid environment was investigated using seventy-five Shaver brown hens in their 14th week of lay. Each hen was housed in individual battery cage and fed daily with 125 g of commercial layers mash containing 16.5% crude protein, 2650 kcal/kg metabolizable energy, 4% crude fat, 6.5% crude fibre, 3.6% calcium and 0.4% phosphorus for 10 weeks. Water was supplied ad libitum to the birds. Eggs were collected daily and recorded for each hen. Data were collected on average daily feed intake(ADFI),  egg weight, eggshell weight, egg shell thickness, egg shape index, albumin height, yolk height, albumin index, yolk index, haugh unit and hen day egg production. Results showed that ADFI, hen day egg production, egg shape index, albumin height, yolk height, yolk index and Haugh units were significantly (P < 0.05) decreased with increase in ambient temperature. However, high ambient temperature did not have significant (P > 0.05) effect on egg weight, eggshell thickness and albumin index. Based on the results obtained in the study, it was concluded that ambient temperature had an effect on the performance of Shaver brown hens in the humid tropics.

scholarly journals Differences in oviposition and egg quality of various genotypes of laying hens

2017 ◽  
Vol 62 (No. 9) ◽  
pp. 377-383 ◽  
Author(s):  
E. Tůmová ◽  
J. Vlčková ◽  
D. Chodová
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Laying Hen ◽  
Sequence Length ◽  
Production Traits ◽  
Egg Weight ◽  
Egg Shell ◽  
Egg Components

The differences in egg production traits in six laying hen genotypes (brown-egg hens Bovans Brown, Bovans Sperwer, ISA Sussex; white-egg hen Dekalb White; laying hens with tinted shells Moravia Barred and Moravia BSL) and the interactions of genotype and oviposition on egg quality were evaluated. The genotype affected the laying rate (P ≤ 0.003), mean sequence length (P ≤ 0.001), and time of oviposition (P ≤ 0.001). The brown-egg genotypes laid eggs approximately 1 h earlier than the white-egg genotypes and approximately 2 h earlier than the tinted-egg genotypes. Egg shell strength was the lowest in tinted-egg genotypes (P ≤ 0.001) and declined with the time of oviposition (P ≤ 0.002). Egg shell percentage (P ≤ 0.011) and thickness (P ≤ 0.011) were affected by the interaction of genotype and oviposition. None of the effects affected egg weight; however, the proportion of egg components was significantly influenced by the interaction of genotype and oviposition. The study confirmed that the differences in the egg production and egg quality of various genotypes are associated with the laying pattern.

scholarly journals Heritability estimates of egg weight and egg shell weight in Ikenne, Nigeria

2017 ◽  
Vol 6 (1) ◽  
pp. 38 ◽  
Author(s):  
Sylvia John-Jaja ◽  
Abdur-Rahman Abdullah ◽  
Samuel Nwokolo
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Age Groups ◽  
Least Square ◽  
Shell Weight ◽  
Egg Weight ◽  
Mean Values ◽  
Heritability Estimates ◽  
Egg Shell ◽  
Analytical System

This study is designed to determine the inheritance pattern of egg weight and egg shell weight of exotic laying chickens at 25, 51, 72 weeks and overall mean ages of the birds. For this purpose, thirty eggs were collected daily from the birds continuously for five days of egg production, at each ages 25, 51 and 72 weeks. The total number of eggs collected at each age was 150 and 450 for the total of three age periods. The mean values of egg weight and egg shell weight revealed an apparent increase from 25-72 weeks of age with their corresponding overall mean values. The least square means of egg shell weight at different age groups are significantly different at (P<0.01) while egg weight was significantly the same since egg shell weight depends on age variance for adequate performance. Statistical analytical system was used to obtain the variance components for the estimation of heritability. High and moderate heritability estimates were obtained when the age variance were included in the computation at different age groups for both traits while high, moderate and low estimates were obtained when the age variances were excluded. The heritability estimates from different egg quality traits were low to high. Since egg weight yielded high estimates at various age groups, the low and moderate heritability estimates recorded for egg shell weight imply that collection of additional records and improvement of non-genetic factors influencing the trait will improve the accuracy of characterizing the inherent ability of the birds.

UTILIZATION OF MEAL FROM A NEW RAPESEED VARIETY, BRASSICA CAMPESTRIS CV. CANDLE, IN LAYER DIETS

1978 ◽  
Vol 58 (4) ◽  
pp. 593-596 ◽  
Author(s):  
S. J. SLINGER ◽  
J. D. SUMMERS ◽  
S. LEESON
Keyword(s):  
Crude Protein ◽  
Egg Production ◽  
Brassica Campestris ◽  
Animal Feed ◽  
Rapeseed Meal ◽  
Metabolizable Energy ◽  
Egg Weight ◽  
Rapeseed Variety ◽  
Egg Shell ◽  
Production Characteristics

A new Brassica campestris variety of rapeseed, cv. Candle, is currently being evaluated as an animal feed ingredient for use in Canada. This rapeseed has a lighter-colored seed coat and slightly less fiber than established varieties. Isocaloric (2,805 kcal metabolizable energy/kg), isonitrogenous (17% crude protein) corn–soy based mash diets were formulated to contain 0, 5, 10 or 15% Candle rapeseed meal. Each diet was offered to eight replicate groups of 12 caged commercial White Leghorn hens, Feed intake, egg production, egg weight and egg shell deformation were measured during each of ten 28-day periods of lay. Rapeseed meal had no significant (P < 0.05) effect on any of these parameters. Unlike older varieties, Candle meal did not depress egg weight when used at levels up to 10% of the diet, although at 15% inclusion there was an indication of reduced egg size. Diet had no significant (P < 0.05) effect on mortality or incidence of liver hemorrhage. From a consideration of all production characteristics, it would appear to be safe to recommend a level of 5–10% Candle rapeseed meal in diets for laying hens.

EFFECT OF DIETARY ENERGY AND CALCIUM LEVEL ON EGG PRODUCTION AND EGG QUALITY

1963 ◽  
Vol 43 (2) ◽  
pp. 337-343 ◽  
Author(s):  
T. M. MacIntyre ◽  
H. W. R. Chancey ◽  
E. E. Gardiner
Keyword(s):  
Adverse Effect ◽  
Specific Gravity ◽  
Calcium Intake ◽  
Egg Production ◽  
Egg Quality ◽  
Dietary Energy ◽  
White Leghorn ◽  
Shell Quality ◽  
Egg Shell ◽  
Single Comb

Two experiments were conducted with Single-Comb White Leghorn laying hens to measure some of the effects of energy and calcium levels on egg production and quality. In Experiment 1, rations containing 3.95 per cent calcium gave significantly higher egg production than rations containing 3.00 or 2.25 per cent, but in Experiment 2 there was no difference in egg production between rations containing 2, 3, 4, 5, and 6 per cent calcium. Rations containing 1.0 per cent calcium gave significantly lower egg production than rations containing 2.0 per cent or more. Levels of calcium up to 6.0 per cent had no adverse effect on egg production.Egg-shell quality as measured by specific gravity improved with increasing levels of calcium. A calcium intake of at least 4 grams per bird per day was necessary for best egg-shell quality.

scholarly journals The effects of humic acid on egg production and egg traits of laying hen 

2012 ◽  
Vol 50 (No. 9) ◽  
pp. 406-410 ◽  
Author(s):  
S. Kucukersan ◽  
K. Kucukersan ◽  
I. Colpan ◽  
E. Goncuoglu ◽  
Z. Reisli ◽  
...  
Keyword(s):  
Humic Acid ◽  
Feed Efficiency ◽  
Egg Production ◽  
Egg Quality ◽  
Experimental Period ◽  
Feed Consumption ◽  
Egg Weight ◽  
Egg Shell ◽  
Haugh Unit

The effects of humic acid on feed consumption, egg production, feed efficiency, egg weight and external and internal egg quality of laying hens were studied during feeding periods. A total of 180 (Hysex Brown) layers (36 weeks of age) were used in this experiment. There was one control and two experimental groups, each containing 60 hens and 4 subgroups. The experimental period lasted 16 weeks. At the end of the experiment, the supplementation of humic acid had a significant effect on feed consumption and feed efficiency. An increase in egg production was determined when humic acid was added to the diets at 30 g/t of feeds (91.70%) and 60 g/t of feeds (91.32%). There were no significant differences between the groups in egg shell thickness, egg shell breaking strength, yolk index, albumen index and Haugh unit. It can be therefore concluded that the dietary supplementation of humic acid at doses of 30 and 60 g/t feed can be used to improve egg production, egg weight and feed efficiency.

scholarly journals PERFORMANCE AND EGG QUALITY OF HENS FED COCOA HUSK BASED DIETS

2021 ◽  
Vol 25 (1) ◽  
pp. 22-24
Author(s):  
O. SOBAMIWA
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Dietary Treatment ◽  
Colour Index ◽  
Feed Consumption ◽  
Egg Mass ◽  
Shell Weight ◽  
Egg Weight ◽  
Weight Percentage ◽  
Egg Shell

Lowman Brown hens, 37 – week – old were used to study the effect of dietary inclusion of 10 and 20% cocoa husk meal (CHM) at the expense of maize on hen performance and egg quality. The trial was conducted for 10 weeks. Egg production (EP), egg weight (EW), egg mass (EM), feed consumption (FC), and feed efficiency (FC) were cost/kg egg, shell weight, percentage shell and yolk colour index. Inclusion of 10 and 20% CHM in laying hen diets had no significant effect (P <0.05) on EP, EM and FE. However, FC was high appeared to be compensated for by increased egg weight. Shell weight and percent shell were not affected by dietary treatment while the 20% CHM diet increased yolk colour index. Feed cost/kg egg was lowered by feeding the test diets. The present study has shown that laying hens can tolerate and produce eggs economically on diets incorporating up to 20% CHM.

scholarly journals Effect of dietary levels of calcium on performance of pullets and layers, physical characteristics of the egg, and calcium and phosphorus in plasma and bone.

1979 ◽  
Vol 27 (4) ◽  
pp. 305-312
Author(s):  
A.R. El Boushy ◽  
M.C. Papadopoulos
Keyword(s):  
Feed Intake ◽  
Shell Thickness ◽  
Egg Production ◽  
Breaking Strength ◽  
Soya Bean ◽  
Metabolizable Energy ◽  
Egg Weight ◽  
Inorganic P ◽  
Calcium And Phosphorus ◽  
Egg Shell

From 16 weeks old 432 chickens of a medium-heavy strain were given diets based on maize, soya bean oilmeal and barley with 1.5, 3.7 or 5.0% calcium and about 0.8% phosphorus. Diets supplied metabolizable energy 12.12, 11.35 or 10.96 MJ/kg. After a laying phase at 23 weeks old when they reached 50% production, chickens given 5.0% Ca weighed significantly less and tended to eat more than those given 1.5 or 3.7% Ca. Ca in plasma did not differ among groups but inorganic P was greater in those given 1.5% Ca than in others. During the laying period of 22 weeks egg production was greatest with 3.7% Ca. Feed intake, egg shell thickness, relative density of egg shell and proportion of shell increased with increasing Ca in the diet. Egg weight, albumen index and yolk index did not differ among groups. Tibial ash and breaking strength of tibia increased with increasing Ca in the diet. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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