Phase Feeding for Laying Hens: Effect of Protein and Essential Amino Acids on Egg Quality and Production

<p>To evaluate the effect of dietary supplementation of DL-methionine and L-lysine in hypoprotein diets on productivity and egg quality, a total of 240 White Leghorn laying hens (Hybrid L-33) of 26 weeks during laying peak period were placed for 49 days, according to completely randomized design with four treatments and 10 repetitions. Dietary treatments consisted of a control diet (no amino acid supplementation) (T0) and supplementation of 0.03% DL-Met and 0.04% L-Lys (T1); 0.06% DL-Met and 0.08% L-Lys (T2) and 0.09% DL-Met and 0.12% L-Lys (T3). At 26 and 33 weeks of age, 30 eggs per treatment were collected to determine internal and external egg quality parameters.</p><p>The experiment diets did not affect the viability and feed intake. Supplementation of essential amino acids, especially the T3 improved egg weight (54.30 to 58.30 g), laying rate (76.89 to 85.45%) and mass conversion (2.52 to 2.11 kg/kg) (P<0.05). At 33 week, the albumin height (7.21 to 8.23 mm), Haugh units (86.70 to 91.15) (P<0.05) and shell surface (67.10 to 69.20 cm2) increased by the effect of supplementation of DL-Met and L-Lys. The results allow recommending the dietary supplementation of 0.09% DL-Met and 0.12% L-Lys in hypoprotein diets to improve productivity and egg quality in laying hens.</p>

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PSIV-B-26 Effect of different intakes of sulfur amino acids on the productive response and egg quality of commercial laying hens

Journal of Animal Science ◽

10.1093/jas/skab235.710 ◽

2021 ◽

Vol 99 (Supplement_3) ◽

pp. 388-389

Author(s):

Elías Salvador Tasayco ◽

Julio Narvaez Reyes ◽

Lorenzo Rios Junchaya ◽

Luis Lujan Valenzuela

Keyword(s):

Amino Acids ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Block Design ◽

Metabolizable Energy ◽

Feed Consumption ◽

Sulfur Amino Acids ◽

Gross Margin

Abstract Modern laying hens have improved their productive response and persistence of egg production. However, in terms of productivity, egg quality and profitability, there are still several issues that need to be reevaluated and improved, among them the level and consumption of digestible sulfur amino acids (AASD). The objective is to determine the effect of different AASD consumptions on the productive response and egg quality of commercial laying hens. METHODS: 160 laying hens of the LOHMANN Brown genetic line, 90 weeks old, of uniform weight and size, were used. The laying hens were distributed in the study area, following the protocol of a Random Block Design (DBA). 4 AASD intakes (g / hen / day) were established as treatments: T-1 (730.11 mg), T-2 (677.20 mg), T-3 (607.09 mg) and T-4 (676.88 mg). Each of the treatments had 5 repetitions, giving a total of 20 experimental units. The variables of egg production, egg weight and mass, feed consumption, feed conversion index, energy efficiency, Haugh unit of the egg, shell color and percentage, egg yolk color and index, margin and economic reward were evaluated. RESULTS: The results showed that the different AASD consumptions did not significantly affect (P > 0.05) the productive response and egg quality of the hens and affected the margin and economic retribution. AASD intakes in the range of 607 to 730 mg / hen / day did not affect the productive response and egg quality. The metabolizable energy level of the diet influences the economic response to different intakes of digestible sulfur amino acids. The consumption of 676.88 mg / hen / day of AASD with a level of 2725 Kcal of metabolizable energy / Kg of feed achieved the highest gross margin and best economic return in 90-week-old LOHMANN Brown laying hens.

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EFFECT OF ENZYME DRUGS, AMINO ACIDS AND PROBIOTICS ON LAYING HENS PERFORMANCE AND ON EGG QUALITY

BULLETIN OF VETERINARY PHARMACOLOGY ◽

10.17238/issn2541-8203.2019.2.111 ◽

2019 ◽

Vol 2 ◽

pp. 111-118

Author(s):

M. Yu. Syromiatnikov ◽

◽

M. I. Derevshchikova ◽

N. V. Pas’ko ◽

E. V. Mikhailov ◽

...

Keyword(s):

Amino Acids ◽

Laying Hens ◽

Egg Quality

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Distillers feeds and feed fractions of barley in the diets of laying hens

Agricultural and Food Science ◽

10.23986/afsci.72916 ◽

1990 ◽

Vol 62 (5) ◽

pp. 423-433

Author(s):

Matti Näsi

Keyword(s):

Amino Acids ◽

Adverse Effects ◽

Ethanol Production ◽

Feed Intake ◽

Laying Hens ◽

Egg Quality ◽

Protein Supplement ◽

Colour Intensity ◽

Egg Weight ◽

Barley Protein

Two experiments using 551 and 537 LSK-61 WL laying hens in the tests were conducted to evaluate hen performance and egg quality when graded levels of barley or wheat distillers feeds (BDDGS, WDDGS) from conventional process and barley protein and fibre (BP, BF) from integrated starch-ethanol production were incorporated into the diets. In the first exp. hens were fed diets containing 200 g/kg diet of WDDGS or 100 or 200 g BDDGS either with or without cellulase addition, respectively. In the second trial hens were fed diets with 50 or 100g BP as protein supplement or 100 or 200g/kg diet BF with or without multienzyme (Avizyme) addition. Each diet with similar contents of ME, CP, lysine and S-amino acids was fed to hens from 34 to 58 wk of age following 4-wk pretreatment and 2-wk transition periods. There were only small dietary effects and no significant differences in performance due to treatment in either trial. The production level was rather high; on average the laying rate was 82.3 and 84.5 %, feed intake 119 g and 118 g/d and FCR 2.42 and 2.37 kg feed/kg eggs in exp. 1 and 2, respectively, indicating no adverse effects of the supplements used. A linear decrease (P < 0.01) in egg weight and yolk colour intensity (P

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EFFECT OF DIFFERENT PROTEIN AND/OR METABOLIZABLE ENERGY LEVELS IN DIETS FORMULATED BASED ON IDEAL PROTEIN CONCEPT ON PERFORMANCE, EGG PRODUCTION, AND EGG QUALITY TRAITS OF LAYERS DURING PHASE 1 OF EGG PRODUCTION

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v9.i10.2021.4301 ◽

2021 ◽

Vol 9 (10) ◽

pp. 94-107

Author(s):

Shaimaa R. Anwar ◽

Ahmed A. Al-Sagan ◽

El- Bannaa R. A ◽

Melegy T. M

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Metabolizable Energy ◽

Feed Consumption ◽

Ideal Protein ◽

Crystalline Amino Acids ◽

The Ideal

A comparative study was conducted to determine the impacts of crude protein (CP) reductions in laying hen diets. During phase one of egg production, 270 laying hens were randomly assigned into six dietary treatments, which were replicated three times using a 2 × 3 factorial experiment. Reduced CP and metabolizable energy (ME) diets were formulated based on the ideal amino acid profile concept and supplemented with crystalline amino acids. The control treatment received standard commercial diets containing 18.8% CP and 2,725 kcal/kg ME. Average weight gain, hen day egg production percentage, egg weight, egg mass, and other selected egg quality parameters were recorded. Data were statistically analyzed. Feed consumption and the feed conversion ratio were improved in birds fed reduced CP diets supplemented with crystalline amino acids. The dietary CP level significantly influenced shell thickness (ST), while the dietary ME level had no effect. A highly significant interaction was observed between CP percent and the Haugh unit (HU). Results indicate that the “ideal protein concept” may be followed as an economically feasible option for laying hens since it optimizes the dietary amino acid profiles and ME levels, and have a positive effect on hen growth, egg quality and environmental pollution.

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Order of amino acid inclusion in the diet of DeKalb White laying hens

Semina Ciências Agrárias ◽

10.5433/1679-0359.2016v37n3p1539 ◽

2016 ◽

Vol 37 (3) ◽

pp. 1539 ◽

Cited By ~ 1

Author(s):

Danilo Vargas Gonçalves Vieira ◽

Thiago De Sousa Melo ◽

José Humberto Vilar da Silva ◽

Fernando Guilherme Perazzo Costa ◽

Danilo Teixeira Cavalcante ◽

...

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Crude Protein ◽

Egg Production ◽

Laying Hens ◽

Essential Amino Acids ◽

Control Treatment ◽

Amino Acid Supplementation ◽

Haugh Unit

Three hundred and twenty-four DeKalb White laying hens aged 42 weeks were distributed in a completely randomised design with nine treatments and six replicates of six birds in each treatment. The experiment lasted 112 days. Diets were: T1 = 16.02% crude protein - CP [Met + Lys + Thr + Trp + Val]; T2 = 14.02% CP [Met + Lys + Thr + Trp + Ile + Val]; T3 = 14.02% CP [no amino acid supplementation]; T4 = 14.02% CP [Met + Lys + Thr + Trp]; T5 = 14.02% CP [Met + Lys + Thr]; T6 = 14.02% CP [Met]; T7 = 14.02% CP [Lys]; T8 = 14.02% CP [Thr]; T9 = 14.02% CP [Trp]. Regarding the quality of the eggs, the percentage of yolk and albumen, shell thickness and Haugh unit were not affected by the different diets. The percentage of shell, specific gravity and albumen height showed significant differences. We found that supplementation of only one amino acid in the diet (T7, T8 or T9), with the exception of methionine (T6), worsened performance relative to the control. Supplementation of three amino acids (methionine, lysine and threonine; T5) or four amino acids (methionine, lysine, threonine and tryptophan; T4) worsened egg production and conversion per mass and per dozen eggs; however, feed intake and egg weight and mass were similar to the control treatment. When all amino acids (methionine, lysine, threonine, tryptophan, isoleucine and valine; T2) were supplemented performance was similar to the control treatment in all variables. Supplementation of methionine, lysine and threonine is essential for birds in the laying phase; however the addition of six essential amino acids (lysine, methionine, threonine, tryptophan, valine and isoleucine) to the diet of laying hens is important for a good productive performance comparable with the control treatment T1. However, the inclusion of the latter two (isoleucine and valine) is justified only if the production cost is lower.

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