Effects of Calcium and Phosphorus Levels on Egg Weight and Egg Shell Quality in Laying Hens

1. For 6 months 432 medium heavy laying hens were given diets which supplied 0.16, 0.20, 0.40, 0.60, 0.80 or 1.00% available phosphorus. Egg production was greatest by hens given 0.20 or 0.40% P and least by those given 0.16%. Feed intake did not differ among groups. Heaviest eggs, 62.2 g, were laid by hens given 1.00% P. Shell quality, determined from shell percentage, shell thickness and shell index, decreased as P in the diet increased. Hatchability, yolk and white indices of eggs and calcium, P and ash in tibiae of chicks one day old did not differ among groups. Ca in blood of hens did not differ among groups but inorganic P in plasma increased with increasing P in the diet. Ash, Ca and P in tibiae and breaking strength of tibiae of hens increased with increasing P in the diet. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Changes in serum calcium and phosphorus levels and their relationship to egg production in laying hens infected with velogenic Newcastle disease virus

Journal of Applied Animal Research ◽

10.1080/09712119.2017.1352506 ◽

2017 ◽

Vol 46 (1) ◽

pp. 523-528 ◽

Cited By ~ 7

Author(s):

A. O. Igwe ◽

J. I. Ihedioha ◽

J. O. A. Okoye

Keyword(s):

Newcastle Disease Virus ◽

Disease Virus ◽

Serum Calcium ◽

Newcastle Disease ◽

Egg Production ◽

Laying Hens ◽

Velogenic Newcastle Disease Virus ◽

Calcium And Phosphorus ◽

Phosphorus Levels

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

ANIMAL PRODUCTION ◽

10.20884/1.jap.2018.20.3.704 ◽

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.

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

Biotechnology in Animal Husbandry ◽

10.2298/bah1104649k ◽

2011 ◽

Vol 27 (4) ◽

pp. 1649-1658 ◽

Cited By ~ 5

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.

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

Canadian Journal of Animal Science ◽

10.4141/cjas89-088 ◽

1989 ◽

Vol 69 (3) ◽

pp. 757-764 ◽

Cited By ~ 5

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

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

British Poultry Science ◽

10.1080/00071669208417520 ◽

1992 ◽

Vol 33 (4) ◽

pp. 781-794 ◽

Cited By ~ 24

Author(s):

J. Grizzle ◽

M. Iheanacho ◽

A. Saxton ◽

J. Broaden

Keyword(s):

Environmental Factors ◽

Laying Hens ◽

Shell Quality ◽

Egg Shell

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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

Canadian Journal of Animal Science ◽

10.1139/cjas-2017-0134 ◽

2018 ◽

Vol 98 (4) ◽

pp. 619-630 ◽

Cited By ~ 2

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.

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ON THE PHOSPHORUS REQUIREMENTS OF CHICKENS FOR EGG PRODUCTION AND HATCHABILITY

Canadian Journal of Animal Science ◽

10.4141/cjas59-025 ◽

1959 ◽

Vol 39 (2) ◽

pp. 182-192 ◽

Cited By ~ 11

Author(s):

W. F. Pepper ◽

S. J. Slinger ◽

J. D. Summers ◽

G. C. Ashton

Keyword(s):

Total Phosphorus ◽

Egg Production ◽

High Efficiency ◽

Laying Hens ◽

Weight Maintenance ◽

Calcium Content ◽

Dicalcium Phosphate ◽

Egg Weight ◽

Shell Quality ◽

Clear Cut

An experiment was made in an attempt to determine the availability of the phosphorus in soft phosphate as compared with that in dicalcium phosphate for laying hens fed a diet of natural ingredients. A high efficiency "all-vegetable" diet containing 0.38 per cent total phosphorus and an estimated 0.11 per cent nonphytin phosphorus was fed without added phosphorus and with sufficient dicalcium phosphate or soft phosphate to supply 0.05 and 0.1 per cent phosphorus. The calcium content of all diets was kept constant at 2.4 per cent.The results indicated that the inclusion of supplementary phosphorus did not improve egg production or feed required per dozen eggs. Differences were not demonstrated in body weight maintenance, egg weight, specific gravity of the eggs, hatchability, or bone ash at the end of a 44-week period of production.The results suggest the possibility that egg weight loss after 14 days’ incubation may have been influenced by supplementary phosphorus. Evidence for this effect was not clear-cut and more work appears desirable in this connection.It is concluded that it is not possible to assay feed phosphates for laying hens with diets of natural ingredients. It would also appear that a level of 0.38 per cent total phosphorus and 0.11 per cent nonphytin phosphorus is adequate for laying hens.Supplementation of an "all-vegetable" laying diet with Vigofac did not improve egg production, feed efficiency, egg weight, egg-shell quality or hatchability.

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