scholarly journals RATE OF CO2AND C14EXHALATION IN LAYING HENS RESTING AND DURING EGG-SHELL MINERALIZATION AFTER A SINGLE INJECTION OF NaHC14O3

1970 ◽  
Vol 10 (Hors-série 2) ◽  
pp. 133-139 ◽  
Author(s):  
K. LÖRCHER ◽  
CH. ZSCHEILE ◽  
K. BRONSCH
Keyword(s):  
Laying Hens ◽  
Single Injection ◽  
Egg Shell

Selection for egg shell strength in laying hens using shell membrane characteristics

1996 ◽  
Vol 37 (4) ◽  
pp. 757-763 ◽  
Author(s):  
K. Johansson ◽  
J. Örberg ◽  
A.‐B. Carlgren ◽  
M. Wilhelmson
Keyword(s):  
Laying Hens ◽  
Shell Membrane ◽  
Selection For ◽  
Egg Shell

scholarly journals Nutritional Characteristics and Quality of Eggs from Laying Hens Fed on a Dried Papaya Peel Meal Diet

2019 ◽  
Vol 20 (3) ◽  
pp. 147
Author(s):  
Jein Rinny Leke ◽  
Florencia Nery Sompie ◽  
Erwin Wantasen ◽  
Trina Ekawati Tallei
Keyword(s):  
Crude Protein ◽  
Laying Hens ◽  
Hdl Cholesterol ◽  
Egg Yolk ◽  
Egg White ◽  
Blood Cholesterol ◽  
Negative Effects ◽  
Egg Weight ◽  
Nutritional Characteristics ◽  
Egg Shell

The objectives of this study were to analyze the eggs nutritional characterics and quality from laying hens fed with diried papaya (Carica papaya L) peel meal diets. A total 200 brown laying hens strain MB 402 (42 week-old). The design used in this study was  a The objectives of this study were to analyze the eggs’ nutritional characteristics and quality from laying hens fed with dried papaya (Carica papaya L) peel meal diets. A total of 200 brown laying hens strain MB 402 (42 week-old) were used in this experiment. The design used in this study was a completely randomized design (CRD) consisting of 5 treatments and 4 replications (10 hens each). The treatments consisted of dried papaya peel meal (DPPM) 0%, 3%, 6%, 9% and 12%. Total feeding trial was 8 weeks. The parameters recorded included egg weight (g/bird)), egg yolk weight (g/bird), yolk index (%), albumen index (%), egg yolk color, egg cholesterol (mg/100g), egg crude protein (%), egg crude fat (%), egg white crude protein (%), egg yellow fat (%),  eggshell calcium (%), eggshell phosphorus (%), blood cholesterol (mg/dl), blood LDL cholesterol (mg/dl), and blood HDL cholesterol (mg/dl) of the laying hens. The results showed that feeding birds with 12 %   increased egg yolk weight, egg yolk color, egg crude fat, egg yellow fat, egg cholesterol, egg shell calcium, egg shell phosphor, blood cholesterol, blood HDL. Moreover there were no significant differences in egg weight, yolk index , albumen index, egg crude protein, egg white crude protein and blood LDL. In Conclusion, DPPM diets can be fed to the laying hens up to 12 % to produce eggs without negative effects on the egg quality.ransomized design (CRD) consisting of 5 treatments and 4 replications (10 hens each). The treatments made use of dried papaya peel meal (DPPM) 0%, 3%, 6 %, 9 % and 12 %. Total feeding trial was 8 weeks . The parameters recorded included egg weight (g/bird), egg yolk weight (g/bird), yolk index (%), albumen index(%), egg yolk calor, egg cholesterol (mg/100g), egg crude protein (%), egg crude fat (%), egg white crude protein (%), egg yellow fat (%), eggshell calsium (%), eggshell phosphorus (%), blood cholesterol (mg/dl), blood LDL Cholesterol  (mg/dl), and blood HDL cholesterol (mg/dl) of the laying hens, The results showed that feeding dried papaya peal meal in cinclusion 12 % increased egg yolk weight, egg yolk color, egg crude fat, egg yellow fat, egg cholesterol,  egg shell calsium, egg shell prosphor, blood cholesterol, blood HDL. Moreover there were no significant diffirence in egg weight, yolk index, albumen index, egg crude protein, egg white crude protein and blood LDL. In conclusion DPPM diets can be fed to the laying hens up to 12 % to produce eggs without negative effects on the egg quality.

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

2011 ◽  
Vol 27 (4) ◽  
pp. 1649-1658 ◽  
Author(s):  
D. Kocevski ◽  
N. Nikolova ◽  
A. Kuzelov
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Quality Parameters ◽  
Older Age ◽  
White Line ◽  
Egg Weight ◽  
Statistical Significant Difference ◽  
Significant Difference ◽  
Breeding Technology ◽  
Egg Shell

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.

THE EFFECT OF GRADED LEVELS OF NICARBAZIN ON REPRODUCTIVE PERFORMANCE OF LAYING HENS

1989 ◽  
Vol 69 (3) ◽  
pp. 757-764 ◽  
Author(s):  
S. LEESON ◽  
L. J. CASTON ◽  
J. D. SUMMERS
Keyword(s):  
Reproductive Performance ◽  
Feed Intake ◽  
Egg Production ◽  
Visual Loss ◽  
Laying Hens ◽  
Marked Effect ◽  
Significant Loss ◽  
White Leghorn ◽  
Egg Weight ◽  
Egg Shell

Three experiments were undertaken to investigate the coccidiostat, nicarbazin, on reproductive performance of layers. In trial 1, levels of 0, 5, 10, 20, 40, 80, 125, and 200 ppm nicarbazin were fed to White leghorn laying hens for 5 wk. By the 2nd week of nicarbazin treatment, egg production was significantly reduced in birds fed 125 and 200 ppm (P < 0.05). Similarly, increasing levels of nicarbazin resulted in decreasing egg weights (P < 0.01) and feed intake was significantly decreased. However, by the 2nd week post-nicarbazin treatment, egg production, egg weight, and feed intake had returned to normal. Nicarbazin had no effect on egg shell deformation or body weight. Nicarbazin had a marked effect on hatchability; levels of 125 and 200 ppm reduced hatchability significantly (P < 0.01) as well as producing an increased incidence of malpositions and malformations. When nicarbazin was withdrawn from the diet, hatchability returned to pretreatment values although malpositions and malformations were still in evidence. Experiments 2 and 3 were designed to study the effect of nicarbazin on production of brown-shelled eggs. In the 2nd experiment 0, 5, 10, 20, and 40 ppm of dietary nicarbazin resulted in significant loss of shell color at 20 and 40 ppm, whereas in exp. 3 with levels of 0, 80, 125, and 200 ppm, brown eggs lost virtually all their color. It is concluded that the adult White Leghorn bird can tolerate up to 125 ppm nicarbazin without significant (P < 0.01) loss of reproductive performance although lower levels show a trend for reduced production. Hatchability is depressed with nicarbazin levels in excess of 80 ppm, while trace levels will produce a visual loss of color in brown-shelled eggs. Key words: Layer, coccidiostat, reproductive performance

Nutritional and environmental factors involved in egg shell quality of laying hens

1992 ◽  
Vol 33 (4) ◽  
pp. 781-794 ◽  
Author(s):  
J. Grizzle ◽  
M. Iheanacho ◽  
A. Saxton ◽  
J. Broaden
Keyword(s):  
Environmental Factors ◽  
Laying Hens ◽  
Shell Quality ◽  
Egg Shell

Assessing the response of hen weight, body composition, feather score, egg quality, and level of excreta nitrogen content to digestible balanced protein intake of laying hens

2018 ◽  
Vol 98 (4) ◽  
pp. 619-630 ◽  
Author(s):  
D. Kumar ◽  
C. Raginski ◽  
K. Schwean-Lardner ◽  
H.L. Classen
Keyword(s):  
Egg Production ◽  
Diet Composition ◽  
Laying Hens ◽  
Egg Quality ◽  
N Content ◽  
Shell Quality ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Egg Shell ◽  
Level Of Significance

Ideally balanced dietary protein is critical for laying hen egg production and feed efficiency, but also affects other important characteristics. This research was designed to study the nonegg production and feed intake response of Lohmann-LSL Lite hens to 550, 625, 700, 775, and 850 mg d−1 of amino acid balanced digestible lysine (Dlys) from 27 to 66 wk of age. Data collection included hen weight (HW), feather scoring, tissue weights, egg specific gravity, egg component weights, and excreta nitrogen (N) content. The experiment was a completely randomized design and level of significance was fixed at P ≤ 0.05. Hen weight (quadratic, Q), pectoralis muscle (absolute, % – Q), and abdominal fat (absolute – linear, L; % – Q) increased with increasing Dlys intake. Although gastrointestinal segment weights and lengths were affected by Dlys intake, interpretation of results was confounded by other aspects of diet composition. Hen feather score (L) and excreta N content (Q) increased, and egg shell quality (L) decreased with increasing Dlys intake. Absolute egg component weights increased with Dlys intake, but effects on proportional weights were Q and relatively minor. In conclusion, balanced Dlys intake affected a variety of practical nonproduction characteristics in laying hens.

scholarly journals Optimal dietary concentrations of vitamin C and chromium picolinate for alleviating the effect of low ambient temperature (6.2 degrees C) on egg production, some egg characteristics, and nutrient digestibility in laying hens

2001 ◽  
Vol 46 (No. 9–10) ◽  
pp. 229-236 ◽  
Author(s):  
N. Sahin ◽  
K. Sahin
Keyword(s):  
Vitamin C ◽  
Ambient Temperature ◽  
Shell Thickness ◽  
Egg Production ◽  
Laying Hens ◽  
Chromium Picolinate ◽  
Shell Weight ◽  
Egg Shell ◽  
Haugh Unit ◽  
Low Ambient Temperature

This experiment was conducted to evaluate the effect of vitamin C (L-ascorbic acid) and chromium (chromium picolinate, Cr Pic) on egg production, some egg characteristics, and digestibility of nutrients in laying hens (Hy-Line) reared under a low ambient temperature (6.2&deg;C). Two hundred and ten laying hens (32 week-old) were divided into seven groups, 30&nbsp;hens per group. The treatment groups were designed in a 2 &times; 3 factorial arrangement using two levels of vitamin C (125 and 250 mg/kg of diet) and three levels of chromium picolinate (200, 400, or 800 &micro;g/kg of diet), and control group was fed basal diet. The highest values of performance were obtained if 250 mg/kg vitamin C was supplemented with either 400 or 800 &micro;g Cr per kg of diet. An interaction between vitamin C and chromium for egg production (P&nbsp;= 0.05) and feed efficiency (P&nbsp;= 0.02) was detected. Similarly, egg weight, specific gravity, egg shell thickness, egg shell weight and Haugh unit improved with diet containing 250 mg vitamin C and either 400 or 800 &micro;g Cr per kg of diet (P&nbsp;&pound; 0.05). Digestibility of dry matter (DM), ash, organic matter (OM), crude protein (CP), and ether extract (EE) were higher with higher dietary vitamin C (P&nbsp;&pound; 0.05) and also with higher Cr (P&nbsp;&pound; 0.05). There were no interactions between vitamin C and chromium detected for any parameters measured for egg quality in terms of egg weight, specific gravidity, egg shell thickness, egg shell weight and Haugh unit and digestibility of nutrients (P&nbsp;&sup3; 0.28). Data obtained in the present study shows that a combination of 250 mg vitamin C and 400 &micro;g chromium per kg of diet gave the best results in laying hens reared under a low ambient temperature and a conclusion is suggested that such a diet can be considered as a protective management practice in poultry to alleviate, at least in part, the depressive effect of cold stress on poultry performance.

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