Comparative Efficacy of Herbal Combined Amino Acid with Synthetic Amino Acid Supplemention on Egg Quality Parameters of White Leghorn Layers

The present study was conducted to assess the effect of supplementation of Multi-enzymes with lysophospholipids on production performance of pure line White Leghorn layers. Body weights before and after the experiment did not differ significantly across the experimental diets. Irrespective of the dietary treatments, the birds gained 3.83 per cent of live weight relative to its initial body weight. Mean per cent Hen housed egg production was significantly (Pis less than 0.05) higher in diet supplemented with 0.10 MEC-L than other groups. Mean egg weight and average daily feed consumption during 25 to 35 weeks of age indicated no significant effect of enzyme supplementation. Average daily feed consumption per bird in control, 0.05 % and 0.1% multi-enzyme supplemented groups was 108.13, 105.66 and 107.67 g respectively and birds offered control diet recorded numerically more feed intake than enzyme supplemented groups. Comparatively low feed per egg was observed in 0.10 per cent group followed by 0.05 per cent group which offers economic benefits than control diets. However, the egg quality traits between different dietary enzyme supplementation groups showed no significant difference.

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Effects of dietary protein, energy and β-mannanase on laying performance, egg quality, and ileal amino acid digestibility in laying hens.

Poultry Science ◽

10.1016/j.psj.2021.101312 ◽

2021 ◽

pp. 101312

Author(s):

Dima White ◽

Roshan Adhikari ◽

Jinquan Wang ◽

Chongxiao Chen ◽

Jae Hwan Lee ◽

...

Keyword(s):

Amino Acid ◽

Dietary Protein ◽

Laying Hens ◽

Egg Quality ◽

Protein Energy ◽

Laying Performance

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Dual-Purpose Poultry in Organic Egg Production and Effects on Egg Quality Parameters

Foods ◽

10.3390/foods10040897 ◽

2021 ◽

Vol 10 (4) ◽

pp. 897

Author(s):

Marianne Hammershøj ◽

Gitte Hald Kristiansen ◽

Sanna Steenfeldt

Keyword(s):

Egg Production ◽

Egg Quality ◽

Quality Parameters ◽

Egg Laying ◽

High Yield ◽

Meat Production ◽

Dual Purpose ◽

Shell Quality ◽

Egg Shell ◽

Genotype A

Egg laying genotypes have been selected for generations due to their high yield and egg quality, resulting in efficient feed utilization and low body weight; hence, they are not suitable for meat production. This imposes an issue for the male layer chicks, which are killed at one day old. Because of ethical and food waste concerns, the search for suitable dual-purpose genotypes in order to avoid euthanasia of male day-old chicks has intensified. The aim of the present study is to evaluate potential dual-purpose genotypes for their egg quality compared to a representative egg laying genotype. Three dual-purpose genotypes with divergent characteristics were evaluated: genotype A represented an experimental crossbreed based on a broiler type male and an egg layer female, genotype B was a pure breed, and genotype C was a crossbreed of a layer type. These were compared to a control genotype D, which was an egg layer. Eggs were collected six times during the period of 21–54 weeks of hen age, i.e., a total of 1080 shell eggs were analyzed. Examined parameters were weights of egg, shell, yolk, and albumen, by calculating their relative proportions. Shell quality was assessed by shell strength, shell stiffness, and shell thickness. Yolk quality was determined as yolk color and inclusions of blood and meat spots, and albumen quality was evaluated in terms of pH and dry matter (DM) content. The egg layer genotype produced the smallest eggs with least blood and meat spot inclusions compared to that produced by the three dual-purpose genotypes. Shell quality was superior for the layer genotype. However, the experimental genotype A laid eggs of comparable shell quality, albumen DM, and yolk weight, but also with the darkest and most red-yellow colored yolk. The two other dual-purpose genotypes produced eggs of low-medium quality. In conclusion, the genotype A could serve as dual-purpose genotype from an egg quality perspective.

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