Feeding Laying Hens a Diet Containing High-Oleic Peanuts or Oleic Acid Enriches Yolk Color and Beta-Carotene While Reducing the Saturated Fatty Acid Content in Eggs

We investigated the dietary effects of high-oleic peanuts (HOPN) or oleic fatty acids (OA) on older production hen performance, egg mass and quality, and lipid composition. A total of 99 laying hens were divided between three treatments and fed ad libitum for 8 weeks: (1) Conventional diet; (2) HOPN diet; (3) OA diet. Body weight (BW) was measured at weeks 1 and 8, and feed, egg weights (EW), and egg quality parameters were collected. Data was analyzed by analysis of variance at p < 0.05 significance level. There were no treatment differences in 8 week BW, feed conversion ratio, or average weekly egg quality parameters. The 8 week average EW of eggs from the HOPN group had reduced EW relative to the other treatment groups (p = 0.0004). The 8-week average yolk color score (p < 0.0001) was greater in eggs from the HOPN group relative to the other treatments. Overall, the β-carotene (p < 0.006) and OA content (p < 0.0001) was greater in eggs from the HOPN group, with reduced saturated fats in eggs from the HOPN group relative to the other treatments. These results suggest that HOPN and/or OA may be a useful layer feed ingredient to enrich eggs, while significantly reducing egg size in older production hens.

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Pequi peel meal in laying hen diet

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v38i2.29240 ◽

2016 ◽

Vol 38 (2) ◽

pp. 151 ◽

Cited By ~ 1

Author(s):

Amanda Lapa Silva ◽

Romênia Regina Pires Lage ◽

Daniel Emygdio de Faria Filho ◽

Izabela Lorena Azevedo ◽

Adélio Nunes Dias ◽

...

Keyword(s):

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Egg Yolk ◽

Laying Hen ◽

The Other ◽

Egg Mass ◽

Feed Conversion ◽

Randomized Design ◽

Completely Randomized Design

This study evaluated the effect of pequi peel meal in the diet for laying hens on performance and egg quality. Hy-Line® Brown hens (n=160) aged 55 weeks with 1642±63g body weight were distributed in a completely randomized design with five treatments and four replications of eight birds each. The treatments consisted of isometric substitution of corn by pequi peel meal at 0, 2.5, 5.0, 7.5 and 10%. The performance and internal and external egg quality were evaluated. Egg production, egg mass and feed conversion worsened linearly with increasing replacement of corn with pequi peel meal, while the yolk color increased linearly. The other variables related to performance and internal and external egg quality were not significantly affected by the treatments. It can be concluded that the use of pequi peel meal replacing corn in laying hen diet does not change the internal and external egg quality, improves the pigmentation of egg yolk, and impairs performance of laying hens.

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Phytase and protease supplementation for laying hens in peak egg production

Semina Ciências Agrárias ◽

10.5433/1679-0359.2016v37n6p4285 ◽

2016 ◽

Vol 37 (6) ◽

pp. 4285

Author(s):

Bruno Serpa Vieira ◽

Silvana Alves Pedrozo Vitalino Barbosa ◽

João Marcos Novais Tavares ◽

Inês Gameiro Colvara Beloli ◽

Guilherme Moreira de Mello Silva ◽

...

Keyword(s):

Intestinal Mucosa ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Positive Control ◽

Quality Parameters ◽

Egg Mass ◽

Feed Conversion ◽

Randomized Design ◽

Negative Controls

The effects of the combination of enzymes in commercial laying hens need to be more explored in literature. To determine if the type of protease affects performance, egg quality, nutrient intake, and morphometry of intestinal mucosa of laying hens in peak egg production and fed with phytase, 780 25-weeks Hy-Line W36 hens were assigned to a completely randomized design composed of five treatments/diets (one positive control, two negative controls, and negative controls plus protease A or B), with 12 replicates of 13 birds each. There was no effect of treatments (P > 0.05) on egg production, egg mass and feed conversion, even though the nutritional restriction imposed by the negative controls reduced egg weight (P = 0.02), albumen height (P < 0.01), and Haugh unit (P < 0.01). Although inclusion of proteases in negative controls did not cause the calculated intake of protein and amino acids to return to the same amount consumed by positive-control hens, egg quality parameters returned to positive control standards with protease A. Intestinal mucosa responded to treatment only at jejunum, where birds fed with protease B showed greater (P < 0.01) villus height and crypt depth than those treated with protease A. These findings suggest that different proteases and phytases interact distinctly and, in consequence, induce different responses on the birds. Moreover, the behavior of egg quality parameters after protease A inclusion in the diet indicates that the nutritional contribution of the combination of this protease with phytase is greater than the contribution of protease alone.

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The effect of additional turmeric flour in rations on the performance and egg quality of laying chicken isa brown strain age 70th weeks

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/888/1/012054 ◽

2021 ◽

Vol 888 (1) ◽

pp. 012054

Author(s):

A Jaelani ◽

N Abelina ◽

R Samudera ◽

T Rostini ◽

Masganti ◽

...

Keyword(s):

Research Method ◽

Laying Hens ◽

Egg Quality ◽

Egg Mass ◽

Feed Conversion ◽

Unit Value ◽

Randomized Design ◽

Completely Randomized Design ◽

Haugh Unit

Abstract This research aims to study and analyze the effect of adding turmeric flour (Curcuma domestica Val) in the rations on the performance of 70 weeks old Isa Brown strain of laying hens. The research method used in this study was an experimental method with a completely randomized design (CRD) step with five treatments and four replications. The number of chickens used was as many as 40 laying hens. The treatments given to the sample were P0 = feed without giving turmeric flour (control), P1 = feed with 0.3% turmeric flour, P2 = feed with 0.5% turmeric flour, P3 = feed with 0.7% turmeric flour and treatment P4 = feed by giving turmeric flour 0,9%. The results showed that giving turmeric flour in the rations of the Isa Brown strain of laying hens affected chicken performance and egg quality. This research concludes that giving turmeric flour a percentage of 0.7% in Isa Brown’s 70-week old laying hens is the best for ration consumption, Hen Day Production, egg weight, feed conversion, and egg quality: Haught Unit, yolk egg color, yolk egg index, grading egg and egg mass. Based on the haugh unit value, all eggs produced are still in the AA grade category

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Influence of peeling and inorganic calcium concentration on the utilisation of giant taro (Alocasia macrorrhiza) corm meal by laying hens

Animal Production Science ◽

10.1071/an18625 ◽

2019 ◽

Vol 59 (8) ◽

pp. 1553 ◽

Cited By ~ 1

Author(s):

S. S. Diarra ◽

I. Wamekeni ◽

A. Vunagilee ◽

H. Lavaka ◽

T. Finau

Keyword(s):

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Shape Index ◽

Egg Mass ◽

Feed Conversion ◽

Shell Quality ◽

Laying Performance ◽

Calcium Source ◽

Main Effects

The effects of peeling and limestone flour level on the utilisation of Alocasia macrorrhiza corm meal (ACM) by laying hens were investigated. Maize-based diets with two concentrations of limestone flour (40 and 60 g/kg) and diets containing 200 g peeled and unpeeled ACM meal/kg with the same levels of limestone flour were fed to five replicate pens containing 10 20-week-old Shaver brown pullets (1635 ± 148 g), each for 105 days. Results showed no interaction or main effects of ACM or limestone concentration on feed intake, egg weight, egg mass, feed conversion efficiency, egg shape index, surface area and Haugh unit (P > 0.05). Feeding whole ACM with 40 g limestone/kg diet reduced hen-day production and shell thickness (P < 0.05) but this was overcome by increasing limestone concentration to 60 g/kg diet. Peeled ACM with both concentrations of limestone flour maintained laying performance and egg quality. We concluded that feeding 200 g whole ACM depresses egg production and shell quality in laying hens, but increasing dietary limestone concentration overcomes this adverse effect. The concentration of limestone flour in the diet has no effect on laying performance. Higher inclusion levels of ACM, calcium source and level that will maintain laying performance and reduce feed cost need to be investigated.

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Changes in performance, egg quality and blood parameters of laying hens fed selenium and oregano oil

Animal Production Science ◽

10.1071/an19319 ◽

2020 ◽

Vol 60 (13) ◽

pp. 1620

Author(s):

H. Reshadi ◽

M. Torki ◽

H. Mohammadi

Keyword(s):

Antioxidant Capacity ◽

Total Antioxidant Capacity ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Synergistic Effects ◽

Blood Parameters ◽

Egg Mass ◽

Feed Conversion ◽

Total Antioxidant

Context Organic and herbal additives in feed may lead to more healthy animal products. For this study, we hypothesised that an organic form of selenium and/or a herbal additive (oregano, Origanum vulgare L.) may improve performance of laying hens. Aims The study was designed to determine the effects of selenium source (SS, sodium selenite; or selenium yeast, SY), oregano essential oil (OEO) and a combination of Se and OEO on performance, egg quality and blood parameters of laying hens. Methods In total, 216 Lohmann LSL-Lite laying hens, 66 weeks of age, were assigned to feed on one of six diets: control group, receiving basal diet (BD); BD + 0.3 mg SS/kg; BD + 0.3 mg SY/kg; BD + 250 mg OEO/kg; BD + 250 mg OEO + 0.3 mg SS/kg; BD + 250 mg OEO + 0.3 mg SY/kg. For each treatment, there were six replicates of six hens each for 12 weeks. Key results Feed conversion ratio was higher (P < 0.05) with the OEO diet than in the control. The SY diet decreased egg production and the OEO diet decreased egg mass (P < 0.05), although this effect was reversed with the SY + OEO diet. This would illustrate a synergistic effect of OEO with SY. Highest and lowest yolk colour values were found with the SY and SS diets, respectively (P < 0.05). Serum uric acid was lower with diets containing Se than the control diet (P < 0.05). Glutathione peroxidase activity was highest with SY and SY + OEO diets and lowest with the OEO diet (P < 0.05). Birds fed the SS + OEO diet showed the highest total antioxidant capacity and those fed SY showed the lowest total antioxidant capacity (P < 0.05). Conclusions Based on the results of the current study, it can be concluded that SY diet have increasing effect on egg weight in laying hens. In addition, novel synergistic effects between OEO and SY diets on improving egg production, egg mass and feed conversion ratio have been found. In terms of oxidative status, the detected synergistic effects between OEO and SS diets on total antioxidant capacity and between OEO and SY diets on glutathione peroxidase (GPx) have not been reported before, that appreciate more clarifying investigations in future. Although, dietary supplemental SY individually and also with OEO increased GPx, adding SS to diet together with OEO showed more improving effect on GPx compared to the separate usage. Implications Dietary supplemental SY can improve egg weight in laying hens. In addition, adding SY to diet of laying hens individually and with OEO have beneficial effects on oxidative status of bird in terms of GPs activity, which in turn can ameliorate the unfavourable impressions of probable environmentally oxidative stress on productive performance.

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Production performance and egg quality of White Rock laying hens fed diets containing whole linseed

Bangladesh Journal of Livestock Research ◽

10.3329/bjlr.v20i1-2.47019 ◽

2020 ◽

Vol 20 (1-2) ◽

pp. 48-53

Author(s):

H Khatun ◽

MN Islam ◽

MA Rashid ◽

MY Ali ◽

MSK Sarker

Keyword(s):

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Control Diet ◽

Production Performance ◽

Egg Mass ◽

Feed Conversion ◽

Egg Weight ◽

Quality Aspects ◽

Significant Difference

This study was conducted to know the production performance of laying hen by using different graded level of linseed. At 56 weeks of age, a total of 160 laying hens were raised up to 63 weeks of age. All hens were fed a basal corn soyabean meal diet. The experiment was allowed 4 dietary treatments (T0, no addition of whole linseed in the basal diet; T1, addition of 5% whole linseed; T2, addition of 10% whole linseed and T3, addition of 15% whole linseed) with 5 replications and per replication contains eight hens. Egg production, feed intake, egg weight of each treatment was recorded. Egg samples were collected and analyzed for egg quality. The results showed that egg production and egg mass (kg) exhibited for all dietary treatment groups were unaffected (P>0.05) by feeding linseed to the laying hens. Feed Conversion Ratio (FCR) was found significant difference within the four dietary group (P<0.05). Egg quality aspects such as yolk weight, egg weight, HU and yolk index were not differed significantly (P>0.05) among treatments. A trend for lower yolk weight was observed in birds fed 10% linseed, where as the highest yolk weight percentage was recorded in control diet. There was no statistical difference among the different diets for yolk index. The results of the present trial suggested that feeding linseed to the laying hens has no detrimental effects on egg production and egg quality. Bangladesh J. of Livestock Res. 20(1-2): 48-53, Jan-Dec 2013

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Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Arquivo Brasileiro de Medicina Veterinária e Zootecnia ◽

10.1590/s0102-09352012000300028 ◽

2012 ◽

Vol 64 (3) ◽

pp. 743-750 ◽

Cited By ~ 13

Author(s):

G.O Figueiredo ◽

A.G Bertechini ◽

E.J Fassani ◽

P.B. Rodrigues ◽

J.Á.G Brito ◽

...

Keyword(s):

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Experimental Unit ◽

Egg Mass ◽

Feed Conversion ◽

Linear Effect ◽

Randomized Experimental Design ◽

Egg Shell

The present study was developed using 864 Hy-Line W36 laying hens (42 to 58 weeks of age) with a randomized experimental design in a 4x3 factorial arrangement, with five replicates and 12 birds per experimental unit and 4 evaluation periods of 28 days each. The digestible lysine levels studied were 0.675%, 0.743%, 0.811% and 0.879%, and the digestible threonine levels were 0.542%, 0.596% and 0.650%. The performance and egg quality was evaluated. There were no significant effects on the egg production, specific gravity, albumen and yolk percentage and total solids in albumen and yolk for birds submitted to the different dietary digestible lysine and threonine levels. There was significant interaction between these amino acids on the egg shell percentage and Haugh unit in fresh eggs. There was a decreasing linear effect on the feed intake with increase of digestible lysine level. Egg weight, egg mass and feed conversion demonstrated a quadratic effect with the increase of the digestible lysine level with the best results in the diets with 0.754, 0.772 and 0.795% of digestible lysine, respectively.

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A by-product of pinto beans in diets for quail in the laying phase

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v42i1.48883 ◽

2020 ◽

Vol 42 ◽

pp. e48883

Author(s):

Gisele Maria Nunes Vieira ◽

Adriana Aparecida Pereira ◽

Dirceu Neutzling Griep Júnior ◽

Wilson Araújo da Silva ◽

Samila Santos Viana ◽

...

Keyword(s):

Japanese Quail ◽

Egg Quality ◽

Quality Parameters ◽

Egg Laying ◽

Egg Mass ◽

Feed Conversion ◽

Randomized Design ◽

Final Weight ◽

Completely Randomized Design ◽

Pinto Beans

The aim of this study was to evaluate levels of inclusion of pinto beans in diets for quail in the laying phase on their performance and egg quality. A total of 280 Japanese quail in the laying phase were distributed into five treatments in a completely randomized design with eight replicates and seven birds per plot. Treatments consisted of five levels (0, 2, 4, 6, and 8%) of inclusion of pinto beans in the diets, which remained isoenergetic and isoproteic. The experiment began with the quail at 70 days of age and lasted 63 days, with their performance assessed every 21 days and egg-quality parameters on the last two days of each cycle. The following parameters were evaluated: final weight, feed intake, egg-laying rate, feed conversion (per dozen eggs and per egg mass), egg weight, eggshell thickness, specific gravity, yolk color, and weights of shell, yolk, and albumen. No difference was detected between the bean inclusion levels for any of the performance and egg-quality traits assessed or the birds' final weight. In conclusion, up to 8% raw pinto beans may be added in diets for Japanese quail in the laying phase without compromising their performance or internal-external egg quality.

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Egg quality and production performance of laying hens injected with growth hormone and testosterone in the late phase of production

Animal Production Science ◽

10.1071/an14111 ◽

2016 ◽

Vol 56 (1) ◽

pp. 147

Author(s):

H. Mohammadi ◽

Z. Ansari-Pirsaraei ◽

S. N. Mousavi ◽

M. Bouyeh ◽

A. Gholibeikifard ◽

...

Keyword(s):

Growth Hormone ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Quality Parameters ◽

Production Performance ◽

Fixed Dose ◽

Control Group ◽

Egg Mass ◽

Positive Effects

In this study, 160 73-week-old laying hens (HyLine W-36) were used to investigate the changes in production performance and egg quality parameters of aged laying hens after injection of different doses of growth hormone (GH) and a fixed dose of testosterone (Ts). The hens were weighed individually, placed in laying cages and then randomly assigned to four treatments with four replicates of 10 birds each, in a completely randomised design. The experiment was started at the 75th week and lasted until the 82nd week of age. The treatments were: 1: injection of 100 µL distilled water (control group), 2: injection of 500 µg Ts/kg liveweight + 50 µg GH/kg liveweight, 3: injection of 500 µg Ts/kg liveweight + 100 µg GH/kg liveweight and 4: injection of 500 µg Ts/kg liveweight + 150 µg GH/kg liveweight. In this study, ovulation rate (egg production percent), egg mass and feed intake were significantly higher in Treatment 3 than the control group (P < 0.05), and in Treatment 4, feed conversion ratio was significantly higher than for the other experimental groups (P < 0.05). In addition, the birds in Treatment 3 showed greater egg weight, albumen height, eggshell weight, eggshell density and eggshell weight per surface area than the control group (P < 0.05). In Treatment 3, egg length significantly increased compared with Treatments 1 and 4 (P < 0.05), and in Treatments 2 and 4, shell breaking strength was significantly lower than for the control group (P < 0.05). In conclusion, our results showed positive effects of GH and Ts administration on egg quality parameters and production performance in aged laying hens. Taken together, in the present study Treatment 3 was found more effective in improving egg quality and production performance of the old laying hens.

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High Temperature With Low Humidity or Vice Versa Does Not Affect Performance and Physiology of Laying Hens

10.20944/preprints202011.0251.v1 ◽

2020 ◽

Author(s):

Da-Hye Kim ◽

Yoo-Kyung Lee ◽

Sang-Ho Kim ◽

Kyung-Woo Lee

Keyword(s):

Biochemical Parameters ◽

Egg Production ◽

Laying Hens ◽

Egg Quality ◽

Density Lipoprotein ◽

Scientific Basis ◽

Egg Mass ◽

Thermal Treatments ◽

Feed Conversion ◽

Laying Performance

The present study investigated the effect of different ambient temperature and relative humidity (RH) but equal temperature-humidity index (THI) on laying performance, egg quality, heterophil to lymphocyte ratio (H/L ratio), corticosterone (CORT) concentration in blood, yolk and albumen, and plasma biochemical parameters in laying hens. One hundred and twenty commercial hens (Hy-Line Brown) aged 60 weeks were allocated into 2 environmental chambers. Laying hens were subjected to either one of two thermal treatments, i.e., 26ºC and 70% RH (LH75) and 30ºC and 30% RH (HL75) for 28 days. Both thermal treatments had equal THI being 75. Neither LH75 nor HL75 affected (P > 0.05) laying performance including egg production, egg weight, egg mass, feed intake, and feed conversion ratio. Plasma biochemical parameters such as total cholesterol, high-density lipoprotein cholesterol, triglyceride, calcium, magnesium, and phosphorus was not altered (P > 0.05) by thermal treatments. As to the stress indicators, both environment regimes failed (P > 0.05) to affect blood H/L ratio and CORT levels in plasma, yolk and albumen although albumen CORT levels were elevated (P < 0.05) in LH75 vs. HL75 at days 3, 7, and 28. In conclusion, our study suggests that laying hens performed and responded equally when they were exposed to equal THI environment conditioned from either 26ºC and 70% RH or 30ºC and 30% RH. The results of this study will be served as a scientific basis for management decisions and handling under thermally challenging conditions.

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