The effects of different protein levels in laying hens under hot summer conditions

2017 ◽  
Vol 57 (5) ◽  
pp. 927 ◽  
Author(s):  
Mehran Torki ◽  
Masoomeh Nasiroleslami ◽  
Hossein Ali Ghasemi
Keyword(s):  
Ambient Temperature ◽  
Laying Hens ◽  
Egg Quality ◽  
Control Diet ◽  
Diet Group ◽  
High Ambient Temperature ◽  
Performance Criteria ◽  
Housing System ◽  
Control Group ◽  
Egg Mass

The objectives of the present study were (1) to determine the extent to which the crude protein (CP) content of laying hen diets can be reduced, based on performance criteria, and (2) to determine how egg quality traits and blood biochemical parameters are affected by changes in dietary CP under hot summer conditions. The requirements for egg mass (EM) and feed utilisation (FU) were estimated using quadratic equations and broken-line regression models. Laying hens were raised for a 12-week period (42–54 weeks) in wire cages under a high ambient temperature in an open-sided housing system. A total of 144 Lohmann LSL laying hens were assigned to four treatments with six replicates of six birds each. The four experimental diets (11.51 MJ ME/kg) varied according to four CP levels: normal-CP diet (Control, 16% CP) and low-CP diets containing 13%, 14%, or 15% CP. All diets were fortified with DL-methionine, L-lysine, L-threonine and L-tryptophan at levels sufficient to meet dietary requirements. The results showed that under high ambient temperature conditions, all productive performance traits of birds fed 15% and 14% CP diets were similar to those of birds fed a Control diet (16% CP), whereas feeding a 13% CP diet negatively affected (P < 0.05) EM and FU. Estimations of requirements were of 15.13% and 14.56% CP for EM, and 14.86% and 14.38% CP for FU using quadratic and broken-line models, respectively. Haugh units, blood uric acid levels and albumin levels were significantly lower in birds fed a 13% CP diet compared with the Control group. In contrast, yolk colour index and blood triglyceride level were higher (P < 0.05) for the hens fed the 14% and 13% CP diets than for birds fed the Control diet. Overall, hens consuming 14% and 15% CP diets performed equally as well as the high protein diet group under hot summer conditions.

scholarly journals Effect of graded dietary inclusion levels of hybrid rye grain on productive performance, the cost-effectiveness of nutrition and egg quality in laying hens

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Dariusz Mikulski ◽  
Jakub Naczmański ◽  
Marzena Mikulska ◽  
Jan Jankowski
Keyword(s):  
Cost Effectiveness ◽  
Laying Hens ◽  
Egg Quality ◽  
Control Diet ◽  
Control Group ◽  
Egg Mass ◽  
Hybrid Rye ◽  
Dietary Treatments ◽  
The Cost ◽  
Ground Wheat

Abstract The study was designed to investigate productivity parameters, egg quality and the cost effectiveness of feeding laying hens with diets where ground wheat was replaced with varying levels of whole hybrid rye grain cv. Brasetto. A total of 396 Hy-Line Brown hens at 34 weeks of age were allocated to three treatment groups with 66 replicates (cages) of two hens each, and were fed isocaloric and isonitrogenous pelleted diets for 12 weeks. The diet for control group hens (R0) did not contain rye grain. In diets for hens from groups R100 and R200, ground wheat grain was partially replaced with whole rye grain at 100 g/kg and 200 g/kg, respectively. Whole intact rye grains were included in the diets. The cost of diets containing 10% and 20% of whole rye grain was by approximately 1.0% and 1.9% lower, respectively, compared with the control diet that contained no rye grain. During the entire 12-week feeding period, dietary treatments had no effect on laying rate (95.64% to 97.07%), egg weight (62.51 g to 62.74 g) or egg mass output (5.04 kg to 5.12 kg per hen). The inclusion of whole rye grain in layer diets caused a linear increase in feed intake (P < 0.047) and tended to linearly increase the feed conversion ratio (FCR, P = 0.078). Both groups of hens fed diets containing whole rye grain were characterized by a linear decrease in the dry matter (DM) content of excreta (P = 0.001). Increased excreta moisture was accompanied by a tendency towards a higher incidence of dirty eggshells in R200 hens (P = 0.068). The inclusion of 100 g/kg of whole rye grain in layer diets decreased the cost of feed per kg of eggs by 1.9%. Dietary treatments had no significant effect on eggshell thickness (0.330 mm - 0.345 mm), albumen quality (Haugh units, 83.46 – 85.84) or yolk color (3.8 - 4.0). The results of this experiment indicate that pre-pellet inclusion of whole rye (at up to 200 g/kg) in diets with supplemental NSP-degrading enzymes and phytase can be an effective and economically viable alternative to ground wheat in pelleted layer diets.

Aflatoxin B1 and Clinoptilolite in Feed for Laying Hens: Effects on Egg Quality, Mycotoxin Residues in Livers, and Hepatic Mixed-Function Oxygenase Activities

2003 ◽  
Vol 66 (5) ◽  
pp. 860-865 ◽  
Author(s):  
L. RIZZI ◽  
M. SIMIOLI ◽  
P. RONCADA ◽  
A. ZAGHINI
Keyword(s):  
Cytochrome P450 ◽  
Lipid Metabolism ◽  
Aflatoxin B1 ◽  
Laying Hens ◽  
Egg Quality ◽  
Diet Group ◽  
Control Group ◽  
Complete Diet ◽  
Group 2 ◽  
Mixed Function Oxygenase

Ninety-six laying hens were allocated to four groups administered different diets (group 0-0 received a complete diet, group 0-AF received a diet supplemented with 2.5 ppm of aflatoxin B1 [AFB1], group 2-0 received a diet supplemented with 2% clinoptilolite [CPL], and group 2-AF received a diet supplemented with 2% CPL and 2.5 ppm of AFB1) for 4 weeks to evaluate the effect of AFB1 and/or CPL on egg quality and the ability of CPL to interact with the oral administration of AFB1. The possible effects of AFB1 on cytochrome P450–dependent hepatic mixed-function oxygenase (MFO) activities were also evaluated. Mycotoxin reduced yolk weight, while CPL influenced albumen percentage relative to that of eggs laid by chickens in group 0-AF. Eggs laid by chickens in groups 0-AF and 2-AF had stronger shells and weighed less than the eggs of other groups. The eggs of treated groups were lighter in color than those of the control group (P &lt; 0.01), and the tendency to yellowness in eggs was increased by CPL, probably through the affinity of red pigments for adsorbents and a consequent prevalence of yellow tonality. Color parameters might be connected with AFB1's interference with lipid metabolism and pigment deposition. The livers of hens in groups 0-AF and 2-AF showed very low mycotoxin concentrations that were significantly different (P &lt; 0.01). The highest levels observed were those in the livers of the hens receiving the diet supplemented with the mycotoxin alone. AFB1 did not exert any significant effects on the hepatic MFO activities examined.

scholarly journals Paprika and/or marigold extracts in diets for laying hens

2017 ◽  
Vol 18 (2) ◽  
pp. 293-302 ◽  
Author(s):  
Maria Cristina de OLIVEIRA ◽  
Wanessa Dutra da SILVA ◽  
Higor Castro OLIVEIRA ◽  
Eduardo de Queiroz Barros MOREIRA ◽  
Larissa de Oliveira FERREIRA ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Specific Weight ◽  
Control Treatment ◽  
Control Group ◽  
Egg Mass ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Haugh Unit

SUMMARY This study was performed to evaluate the effect of the inclusion of paprika and marigold extracts in sorghum-based rations on the productivity and egg quality of laying hens. One hundred sixty laying hens were distributed in a completely randomized design in five treatments and in a factorial arrangement (2 × 2 + 1), one control ration based on corn, two levels of paprika extract (0 and 6 g/kg diet), and two levels of marigold extract (0 and 1 g/kg diet) in sorghum-based rations. There was no effect (P > 0.05) of the treatments on the weight, specific weight, and Haugh unit of the eggs and productive performance, but the inclusion of paprika extract resulted in eggs with lower egg pH. The interaction between the control group and the factorial was significant (P < 0.05) to the laying rate, egg mass, and yolk color, whose values were lower with sorghum-based diets with no pigment compared to control treatment. The interaction between the paprika and marigold extracts was significant increasing the height (P < 0.03) and color (P < 0.0001) of the yolk when paprika extract was used, with or without marigold extract. Marigold extract inclusion reduced the percentage (P < 0.02) and thickness (P < 0.01) of the eggshell. As conclusion, the inclusion of paprika extract in sorghum-based diets for laying hens is viable for improving the egg quality.

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

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

scholarly journals Effect of anti-prolactin drug and peppermint on broodiness, laying performance and egg quality in indigenous hens

2017 ◽  
Vol 2 (4) ◽  
pp. 547-554 ◽  
Author(s):  
Mst Nasrin Banu ◽  
Md Bazlar Rashid ◽  
Md Mahmudul Hasan ◽  
Fahima Binte Aziz ◽  
Md Rakibul Islam ◽  
...  
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Control Diet ◽  
Egg Laying ◽  
Mentha Piperita ◽  
Sequence Length ◽  
Control Group ◽  
Laying Performance ◽  
Group B

The study was conducted to determine the effect of antiprolactin drug (Bromergon®) and Peppermint (Mentha piperita L.) on broodiness, laying performance and egg quality in indigenous hens. The effect of modulation of prolactin concentration on egg production, sequence length and inter sequence pauses were studied by analyzing the oviposition records. Total sixty indigenous laying hens (30-40 weeks of age), were assigned for treatment with peppermint solution and Bromergon®. Sixty laying hens were randomly divided into 4 groups (A, B, C and D) and each group remained 15 hens. Group A was kept for control, Group B was treated with bromocriptine (Bromergon® SANDOZ) orally @ 640 ?g per bird per day, Group C with 50% peppermint solution @ 10 g per bird orally and Group D was with peppermint and Bromergon® combined at previous dose. Over the course of trial, incremental dietary peppermint (Group C) significantly (p?0.05) increased egg production, body weight of treated indigenous hens than other groups. Egg shell percentage, thickness and haugh unit of hens fed diets supplemented with peppermint were greater than that of hens fed the control diet. However, peppermint supplementation did not influence other egg quality characteristics like albumen and yolk percentages and albumen height. The treated birds had comparatively longer sequences and fewer pauses. It is concluded that the physiological pauses occur during ovulatory sequences can be disrupted effectively using Bromergon® and peppermint. Prolactin levels modulated which may interfere with follicular recruitment and subsequent oviposition thereby improves egg laying potential of the indigenous hens.Asian J. Med. Biol. Res. December 2016, 2(4): 547-554

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

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.

Use of the feed additive “Toxinon” in feeding of replacement young chickens and laying hens

2022 ◽  
pp. 34-49
Author(s):  
T. A. Poleva ◽  
◽  
V. A. Tereshchenko ◽  
Keyword(s):  
Growth And Development ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
The Body ◽  
Production Costs ◽  
Feed Additive ◽  
Control Group ◽  
Egg Mass ◽  
Experimental Group

At the present time of the development of industrial poultry farming, the main tasks are to increase the productivity of poultry, reduce production costs and improve its quality. Under practical conditions, there is a shortage of minerals in compound feed for poultry, which leads to a violation of metabolism in the body, slowing down growth and development, deterioration of the work of organs and systems, a decrease in productivity and its quality, and an increase in the prime-cost of production. The purpose of the research was to study the effectiveness of the use of the feed additive “Toxinon” in feeding of replacement young chickens and laying hens. The research has been carried out under the conditions of OOO “Bogotolskaya Poultry Farm” in the Bogotolsky area in the Krasnoyarsk Territory. Comprehensive studies have been conducted to study the effect of the feed additive “Toxinon” on the growth and development, productivity and metabolism of replacement young chickens and laying hens of the industrial herd of the cross “Haysex brown”. The influence of different dosages of the feed additive “Toxinon” on the growth rate, livestock livability, digestibility and use of feed nutrients, egg productivity, egg quality, hematological and biochemical blood parameters of replacement young chickens and laying hens has been studied. The laying hens of the 3rd experimental group were distinguished by the highest egg productivity during the experiment period, which exceeded the control group in terms of the gross number of eggs by 6,4 %, the intensity of egg production by 5,02 abs.%, egg weight by 3,0 % (P > 0,95), the yield of egg mass on the average laying hen by 9,12 %. At the same time, expenditures of feed in the 3rd experimental group have decreased compared to the control group by 7,3 % for 10 eggs, by 9,2 % for 1 kg of egg mass. It has been found that in feeding replacement young chickens and laying hens, the most effective use of the feed additive “Toxinon” in the dosage of 0,25 % of the weight of the feed mixture (2,5 kg/ton of feed).

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