Broiler breeder egg production and quality are affected by timing of increased dietary Ca relative to photostimulation

2004 ◽  
Vol 84 (3) ◽  
pp. 411-420
Author(s):  
A. Petruk and D. R. Korver
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Dietary Treatment ◽  
Feed Consumption ◽  
Optimal Time ◽  
Shell Weight ◽  
Egg Weight ◽  
Broiler Breeder ◽  
Treatment Groups ◽  
Ash Weight

Ross 508 broiler breeder pullets (n = 400) were reared in floor pens in a light-tight facility with feed allocation based on breeder-recommended body weight targets. At 17 wk, 250 pullets within 15% of the mean weight were randomly assigned to individual cages in one of two environmentally controlled environments: 18°C (exp. 1, n = 125) or 28°C (exp. 2, n = 125). The pullets were photostimulated at 20 wk of age. At 2-wk intervals from 18 to 26 wk, successive groups of hens (n = 25 per environment) were switched from a 0.88% Ca grower diet to a 2.96% Ca breeder diet. Dietary treatment names were based on the time (in weeks) relative to photostimulation that the diet was changed from the grower to the breeder diet (PS – 2, PS, PS + 2, PS+4, and PS + 6, respectively). The hens were killed at 31 wk of age and one leg from each hen was taken for bone mineral analysis. The birds in both experiments maintained target body weights as recommended by the primary breeder; however, the hens in exp. 2 did not consume the allotted feed for the final 2 wk of the experiment. Dietary treatment did not affect feed consumption or body weight. Overall percent hen day production was not affected by dietary treatment in either experiment. In exp. 1, hens in the PS + 4 and PS + 6 treatments produced larger eggs and hens in the PS + 4 treatment produced eggs with greater shell weights. Shell weight as a percentage of egg weight was significantly lower from the PS + 6 hens than the other dietary treatment groups. The PS + 4 treatment resulted in the highest bone Ca as a percentage of ash weight, indicating that changing the diet 4 wk after photostimulation was the optimal time to increase bone Ca reserves in that environment. In exp. 2, the PS + 6 treatment had the highest egg weight whereas birds in the PS and PS + 2 treatment groups had the highest shell weights. Percent shell was the lowest in the PS + 6 and PS + 4 treatment groups overall, although it was only significantly different until 27.4 wk of age. Ca as a percentage of bone weight was lowest in the PS + 2 and PS + 6 treatment groups and Ca as a percentage of ash was lowest in the PS + 2 treatment group. Overall, the results suggest that improper timing of increasing dietary Ca either before or too long after photostimulation decreased eggshell quality and bone characteristics. Elevated environmental temperature appeared to exacerbate these effects; therefore, the change from a low-Ca grower to a high-Ca breeder diet must be made with greater precision in hot climates. Key words: Broiler breeder, photostimulation, dietary calcium, calcium metabolism, heat stress

scholarly journals PERFORMANCE AND EGG QUALITY OF HENS FED COCOA HUSK BASED DIETS

2021 ◽  
Vol 25 (1) ◽  
pp. 22-24
Author(s):  
O. SOBAMIWA
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Dietary Treatment ◽  
Colour Index ◽  
Feed Consumption ◽  
Egg Mass ◽  
Shell Weight ◽  
Egg Weight ◽  
Weight Percentage ◽  
Egg Shell

Lowman Brown hens, 37 – week – old were used to study the effect of dietary inclusion of 10 and 20% cocoa husk meal (CHM) at the expense of maize on hen performance and egg quality. The trial was conducted for 10 weeks. Egg production (EP), egg weight (EW), egg mass (EM), feed consumption (FC), and feed efficiency (FC) were cost/kg egg, shell weight, percentage shell and yolk colour index. Inclusion of 10 and 20% CHM in laying hen diets had no significant effect (P <0.05) on EP, EM and FE. However, FC was high appeared to be compensated for by increased egg weight. Shell weight and percent shell were not affected by dietary treatment while the 20% CHM diet increased yolk colour index. Feed cost/kg egg was lowered by feeding the test diets. The present study has shown that laying hens can tolerate and produce eggs economically on diets incorporating up to 20% CHM.

SUBSTITUTION OF SORGHUM FOR WHEAT IN DIETS FOR LAYING HENS

1982 ◽  
Vol 62 (1) ◽  
pp. 305-306 ◽  
Author(s):  
E. E. GARDINER ◽  
D. J. MAJOR ◽  
S. DUBETZ
Keyword(s):  
Body Weight ◽  
Key Words ◽  
Egg Production ◽  
Laying Hens ◽  
Feed Consumption ◽  
White Leghorn ◽  
Egg Weight ◽  
Single Comb

The effects of substituting various levels of sorghum for wheat in diets for laying hens were studied. Egg production, egg weight, feed consumption, body weight and hatchability of eggs from Single Comb White Leghorn hens were not affected by the proportion of sorghum in the diet. Key words: Sorghum, wheat, nutrition, egg production

Effect of methionine and lysine supplementation of diets for laying hens, on production and feed intake

1976 ◽  
Vol 27 (5) ◽  
pp. 739 ◽  
Author(s):  
MW McDonald ◽  
IJ Bruce
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Egg Production ◽  
Function Analysis ◽  
Basal Diet ◽  
Metabolizable Energy ◽  
Feed Consumption ◽  
Multiple Regression Equation ◽  
Weight Changes ◽  
Egg Weight

Six diets containing five levels of methionine and two of lysme were each fed to 12 Leghorn and 12 Australorp pullets for a period of 16 weeks Body weight changes, egg production, egg weight and feed intake were measured Although responses to the diets did not differ significantly In univariate analyses, multrvarrate analysis lndicated a srgnificant interaction between breeds and diets. Increased methionine produced small, significant Increases In egg weight, although responses were inconsistent at different levels Body weight gains were not significantly different between diets. Egg production and feed consumption were significantly affected by diet?, but the pattern of response was also inconsistent. A discriminate function analysis showed a consistent response to increased methionine, which indicated that the basal diet was deficient and that the pullets required a total of 0 275% methionine in their diet Lysine supplementation produced a 'significant decrease In feed intake but had no significant effect on any other variable.A multiple regression equation relating metabolizable energy intake to the variables measured in the experiment was calculated and compared with others reported In the literature This was used to predict the requirements of the pullets for a number of essential amino acids.

scholarly journals Effect of Phytase Supplementation on the Performance of Babcock-380 Layer Hens

2021 ◽  
Vol 1 (1) ◽  
pp. 36-41
Author(s):  
MD. Ruhul Amin ◽  
Elliyana Nadia Hamidi
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Egg Size ◽  
Basal Diet ◽  
Experimental Period ◽  
Egg Mass ◽  
Egg Weight ◽  
Treatment Groups ◽  
Microbial Phytase ◽  
Production Group

 In order to examine the effect of phytase supplementation in the diet of laying hen this experiment was conducted with 30 commercial hybrid Babcock-380 layers of 73 weeks of age. The hens were grouped into 3 treatment groups and given microbial phytase (Rena Phytase 400) at levels 2.5, 1.5 and 0 (control) g/kg feed in addition to their basal diet (110 g commercial pellet/day). Records on egg production/group/day, egg mass weight/day, body weight of hens at the end of experimental period were taken and analysed. Results revealed that hen house egg production (HHEP) and egg weight (EW) varied (p<0.05) among the treatment groups but level of phytase did not affect (p<0.05) body weight of hens. Both HHEP and EW were in order of 2.5>1.5>0 g/kg feed phytase group and all the means were significantly (p<0.05) different from each other within treatment groups. Microbial phytase supplementation in layer ration proved to be beneficial in terms of egg production and egg size even after 72 weeks of age of hens. Layer farms in Malaysia can use this technology to earn more profit.

scholarly journals ALTERATION OF PROTEIN LEVEL IN LAYING RATIONS AT VARIOUS STAGES WITHIN THE LAYING CYCLE AND ITS EFFECT UPON PERFORMANCE OF LAYING HENS

1965 ◽  
Vol 45 (3) ◽  
pp. 211-215 ◽  
Author(s):  
R. E. Smith
Keyword(s):  
Adverse Effect ◽  
Body Weight ◽  
Protein Level ◽  
Egg Production ◽  
Protein Diet ◽  
Feed Consumption ◽  
Egg Weight ◽  
Abrupt Changes ◽  
Step Down ◽  
Protein Diets

An experiment was conducted in which protein level was changed at 84-day intervals throughout the laying year. The diets used contained 11, 15, and 19% protein and these were fed in various sequences during three 84-day periods. All birds received the 15% protein diet in the fourth period. Each of six treatment sequences was imposed upon 160 layers in four replicate pens. The various "step-up" and "step-down" programs had no significant effect upon egg production or feed consumption when compared on a full year basis with a 15% ration fed throughout the year. The 11% protein diet caused a decrease in egg production, egg weight, body weight, and feed consumption in any period in which it was fed but the birds tended to compensate in periods following those in which the low level of protein was fed.There were no differences in performance between the 15 and 19% protein diets and abrupt changes in protein level as such had no adverse effect upon the birds.

scholarly journals Conservation of purelines and their performances under research farm condition

2020 ◽  
Vol 20 (1-2) ◽  
pp. 26-32
Author(s):  
MA Rashid ◽  
MS Rana ◽  
MN Islam ◽  
S Faruque ◽  
H Khatun ◽  
...  
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Sexual Maturity ◽  
Egg Production ◽  
Breeding Programme ◽  
Egg Mass ◽  
Next Generation ◽  
Egg Weight ◽  
Treatment Groups ◽  
Pure Lines

The study was conducted at Bangladesh Livestock Research Institute to evaluate the productive and reproductive performances of 4 pure lines conserving for the production of next generation. A total of 2000 pedigree hatched day-old chicks were wing banded and reared up to 40 weeks of age. Data were kept on daily feed intake (g/bird/day), weekly body weight (g), age at sexual maturity (days), daily egg production (%) and egg weight (g). There were highly significant differences (p<0.01) in body weight at 38 weeks, age at sexual maturity, egg production up to 40 weeks and egg weight at 38 weeks of age among the treatment groups. There were no significant differences (P>0.05) in fertility, hatchability, dead in germ, sound chick and dead in shell percentage among the treatment except cull chicks where L1 showed the highest percent of cull chicks.  Egg production at 23-28 and 35-40 weeks of age differ significantly (p<0.01) except at 29-34 weeks of age (p>0.05). Significant variations for FCR observed at 35-40 weeks of age while it was non-significant (p>0.05) at 23-28 and 29-34 weeks of age. It is revealed that line-2 is superior in terms of egg production, age at sexual maturity and egg mass where line-1 was better in terms of FCR value. Considering the results it may be concluded that there are significant variations exists regarding egg production performances among the experimental pure lines, thus could be utilized successfully for the production of high yielding strains through proper breeding programme. Bangladesh J. of Livestock Res. 20(1-2): 26-32, Jan-Dec 2013

THE EFFECT OF PHASE-FEEDING ON EGG PRODUCTION AND EGG QUALITY OF WINTER-HOUSED WHITE LEGHORN HENS

1982 ◽  
Vol 62 (3) ◽  
pp. 887-897 ◽  
Author(s):  
N. A. CAVE ◽  
R. M. G. HAMILTON
Keyword(s):  
Body Weight ◽  
Protein Content ◽  
Egg Production ◽  
Egg Quality ◽  
Performance Criteria ◽  
Feed Consumption ◽  
White Leghorn ◽  
Egg Weight ◽  
Variable Effect

Two experiments with nine strains of Single Comb White Leghorn hens were conducted to compare laying house performance of hens given a diet of uniform protein content or a phase-feeding diet in which protein content was reduced from 156 to 148 and then to 140 g/kg at 273 and 414, or 273 and 384 days of age. Performance criteria were egg production, feed and protein intake, egg, quality, egg weight, mortality and body weight. Phase-feeding allowed reductions of 4.2 and 4.3% in protein consumption without reducing egg production, mortality or, except in one strain, body weight. There was an increase of 0.5% in feed consumption, but feed cost was reduced by 1.3%. Phase-feeding increased Haugh units by 0.3% and decreased specific gravity of eggs in one experiment, decreased percent visibly-cracked eggs in the other experiment and had no effect on percent blood spots. Depending on strain, phase-feeding had a variable effect on egg weight in exp. 1 but had no effect in the second experiment. Key words: Phase-feeding, protein utilization, egg production, hen

Use of L-carnitine and humate in laying quail diets

2005 ◽  
Vol 53 (3) ◽  
pp. 361-370 ◽  
Author(s):  
Sakine Yalçin ◽  
A. Ergün ◽  
Handan Erol ◽  
Suzan Yalçin ◽  
B. Özsoy
Keyword(s):  
Egg Production ◽  
Feed Consumption ◽  
Control Group ◽  
Carnitine Supplementation ◽  
Egg Weight ◽  
Treatment Groups ◽  
Laying Performance ◽  
Egg Albumen ◽  
Egg Shell ◽  
Haugh Unit

This experiment was carried out to determine the effects of using L-carnitine and humate alone or in combination in quail diets on laying performance, egg traits and blood parameters. A total of 280 Japanese quails aged 10 weeks, divided into one control group and three treatment groups, were used. The diets of the first, second and third treatment groups were supplemented with 100 mg L-carnitine/kg, 1.5 g humate (Farmagülatör® Dry Plus)/kg and 100 mg L-carnitine + 1.5 g humate/kg, respectively. The experimental period lasted 16 weeks. The addition of L-carnitine and sodium humate alone or in combination did not significantly affect body weight, feed consumption, egg production, feed conversion ratio, mortality, egg-shell thickness, egg yolk index and the percentages of egg-shell, albumen and yolk. Egg weight increased (P < 0.001) with L-carnitine supplementation. The values of egg albumen height (P < 0.05), egg albumen index (P < 0.01) and egg Haugh unit (P < 0.05) were increased with humate supplementation. Egg cholesterol content and blood serum parameters were not affected by the supplementation of L-carnitine with or without humate. The results in this study demonstrated that L-carnitine supplementation increased egg weight while humate addition increased egg albumen index and egg Haugh unit of laying quails. However, the combined administration of L-carnitine and humate did not have any significant effects on the parameters measured.

Effects of age at photostimulation on reproductive efficiency and carcass characteristics. 1. Broiler breeder hens

1996 ◽  
Vol 76 (3) ◽  
pp. 275-282 ◽  
Author(s):  
F. E. Robinson ◽  
T. A. Wautier ◽  
R. T. Hardin ◽  
N. A. Robinson ◽  
J. L. Wilson ◽  
...  
Keyword(s):  
Body Weight ◽  
Lipid Content ◽  
Sexual Maturity ◽  
Egg Production ◽  
Reproductive Organ ◽  
Carcass Composition ◽  
High Rate ◽  
Egg Mass ◽  
Broiler Breeder ◽  
Treatment Groups

The effect of age at photostimulation on carcass composition at photostimulation and at sexual maturity as well as its effect on subsequent reproductive performance in broiler breeders was investigated. A total of 600 broiler breeder pullets were reared in light-tight facilities. Skip-a-day feeding was used after 2 wk of age to limit body weight to levels suggested by the breeder. Limited daily feeding was initiated at the time of caging (time of photostimulation). The photoperiods used during rearing and lay were 8L:16D and 14L:10D, respectively. Forty birds were selected for study and moved to laying cages and photostimulated at 120, 130, 140, 150 or 160 d of age. Individual egg production records were kept until 60 wk of age. Twenty additional birds were killed for study of carcass composition and reproductive organ, morphology at the time of photostimulation and 20 others were killed at sexual maturity (first oviposition).As age at photostimulation increased, body weight and percent carcass lipid content increased while percent water and ash content decreased. No significant differences were found among treatment groups at photostimulation for carcass protein content. No significant differences were found in any carcass composition parameter at sexual maturity. All groups showed an increase in lipid content from photostimulation to sexual maturity, with the 120 d treatment group showing the largest increase. As age at photostimulation increased, the time from photostimulation to sexual maturity decreased. Total egg production, first egg weight, total egg mass produced, average fertility, hatchability and hatch of fertile did not differ significantly among treatment groups. Chick production was significantly higher in the 140-, 150- and 160-d treatment groups compared with the 120- and 130-d treatment groups. One explanation for the high rate of egg production seen in birds photostimulated at the older ages was that these birds reached sexual maturity with less between-bird variation. To take advantage of this improved flock uniformity, delaying photostimulation to 140 d of age or later is recommended. Key words: Chicken, broiler breeder, sexual maturity, egg production, hatchability, carcass composition

scholarly journals Effect of supplementation of vitamin E and selenium from Lolyvit-ES on the performance of broiler

2018 ◽  
Vol 3 (4) ◽  
pp. 521-528
Author(s):  
Mohammad Salahuddin ◽  
Zahirul Haque Khandaker ◽  
Mohammad Mohiuddin ◽  
Md Mostain Billah
Keyword(s):  
Body Weight ◽  
Vitamin E ◽  
Body Weight Gain ◽  
Dietary Treatment ◽  
Experimental Period ◽  
The Body ◽  
Feed Consumption ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Treatment Groups

An experiment was conducted in the poultry rearing unit of Sahjalal Animal Nutrition Field Laboratory, Bangladesh Agricultural University, Mymensingh for a period of 30 days by using 108 one week aged straight run Starbro broiler chicks to find out the effect of vitamin E and selenium as feed supplement for the performance of broiler. Chicks were distributed into 4 dietary treatment groups each having three replications (R1, R2, R3) and each replication contains 9 chicks. Dietary treatment groups were T0 (Control i.e. without supplemental vitamin E and Selenium), T1 (Control + 50 mg vitamin E 0.11 mg selenium per kg diet), T2 (Control + 100 mg vitamin and 0.22 mg Selenium per kg diet and T3 (Control + 150 mg vitamin E and 0.33 mg Selenium per kg diet). At end of the feeding trail the body weight of birds were 1238.28, 1231.85, 1272.59, and 1218.33 gm/bird in treatment groups T0, T1, T2 and T3 respectively which differ significantly (p<0.05) where highest body weight observed in T2 group . Body weight gain was highest in T2 (control+100mg vitamin E and 0.22 mg Selenium per kg diet) and lowest in T0 (control). Total Feed consumption during the experimental period was 2480.30, 2523.80, 2564.56 and 2555.39 g for T0, T1, T2 and T3 respectively. At 2nd and 3rd week of age, weekly feed conversion ratio were significantly (p<0.05) higher in T2 group than the other groups including control. Meat yield parameter of broilers showed significant (P<0.05) differences in dressing weight, breast weight and shank weight. Based on the above findings, the result suggest that supplementation of Vitamin E 100 mg and 0.22 mg Selenium per kg diet from ‘‘Lolyvit-ES’’ as a source of Vitamin E and Selenium may be used in broiler rations.Asian J. Med. Biol. Res. December 2017, 3(4): 521-528

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