scholarly journals High Levels of Free Gossypol in Hen Diets: Effects on Body Weight, Feed Consumption, and Egg Production

1957 ◽  
Vol 36 (6) ◽  
pp. 1351-1354 ◽  
Author(s):  
Ram Narain ◽  
Carl M. Lyman ◽  
J.R. Couch
Keyword(s):  
Body Weight ◽  
Free Gossypol ◽  
Egg Production ◽  
Feed Consumption

Navy beans (Phaseolus vulgaris) as a protein source in layer diets

1971 ◽  
Vol 11 (51) ◽  
pp. 387 ◽  
Author(s):  
JK Connor ◽  
AR Neill ◽  
HW Burton
Keyword(s):  
Body Weight ◽  
Phaseolus Vulgaris ◽  
Egg Production ◽  
Body Weight Gain ◽  
Metabolizable Energy ◽  
Feed Consumption ◽  
Egg Mass ◽  
Navy Bean ◽  
Bean Meal ◽  
Methionine Supplementation

The effects of raw versus steamed navy bean (Phaseolus vulgaris) meal, in diets with and without methionine supplementation, on egg production, egg weight, body weight, pancreas weight, mortality, feed consumption and conversion, and energy and nitrogen utilization were determined with laying hens. As the level of raw navy bean meal in the diet increased, egg mass production and body weight gain decreased. Declines in production were largely overcome by steaming the bean meal. Methionine supplementation of both raw and steamed meal diets had no effect on performance. Changes in dietary metabolizable energy and nitrogen retention are discussed in relation to bird performance.

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.

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

Evaluation of various molting methods with perspective of post-molting performance in Japanese quails

2017 ◽  
Author(s):  
Shaukat Ali ◽  
Raheela Akhtar ◽  
Muhammad Younus ◽  
Heinrich Neubauer ◽  
Hafez Hafez ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Efficiency ◽  
Egg Production ◽  
Aluminum Sulfate ◽  
Body Weight Gain ◽  
Feed Consumption ◽  
Feed Restriction ◽  
Japanese Quails ◽  
High Feed

The post-molting performance of 360 female Japanese quails was assessed using five molting methods including feed restriction along with supplementation of dietary levels of aluminum sulfate (AlSO4) and zinc oxide (ZnO) with two concentrations of 0.15% and 0.3%. None of the parameters studied were positively influenced by a single molting method. Body weight gain and feed efficiency were positively affected by higher concentration of ZnO while feed consumption was positively influenced by higher concentration of AlSO4. Similarly high feed efficiency was attributed to higher concentrations of both ZnO and AlSO4. On other hand body weight gain and feed efficiency were negatively influenced by 0.15% ZnO while egg production was worst by 0.15% AlSO4. As each of the molting method had different influence on the tested parameters and none of them could apply individually with perspective of better performance therefore the combinational use of molting methods is recommended according to the focused parameter

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 The Effect of “Free Choice” Grain Feeding on Egg Production, Feed Consumption, Body Weight and Egg Quality

1944 ◽  
Vol 23 (5) ◽  
pp. 360-370 ◽  
Author(s):  
Clarence E. Lee ◽  
J.C. Scholes ◽  
C.L. Henry
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Free Choice ◽  
Egg Quality ◽  
Feed Consumption

scholarly journals Effects of Light Stimulation Age on Body Weight and Egg Production Traits of Broiler Pure-lines in the Laying Period

2020 ◽  
Vol 8 (12) ◽  
pp. 2702-2707
Author(s):  
Musa Sarıca ◽  
Beyhan Yeter ◽  
Emrah Oğuzhan ◽  
Kadir Erensoy ◽  
Sinan Çağlak ◽  
...  
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Agricultural Research ◽  
Live Weight ◽  
The Body ◽  
Feed Consumption ◽  
Production Traits ◽  
Light Stimulation ◽  
Study Results ◽  
Pure Lines

In this study, the effects of light stimulation at normal (NLS: 154 days) and early (ELS: 140 days) age on some physiological and reproductive traits in dam and sire broiler pure-lines were carried out during the laying period. The study was conducted with A1, A2, A3, A4 dam lines and B1, B2 sire lines up to 43 weeks of age, whose breeding studies were carried out in Eskişehir Geçit Kuşağı Agricultural Research Institute. Live weight and feed consumption were determined during the growing period. In the laying period, in addition to these, the first laying age, 50% yield age, egg yield, hatching egg yield and egg weight were determined. The data obtained were evaluated according to light stimulation age and pure-lines by two factor analysis of variance. NLS and ELS treatments did not significantly affect the body weights of the pure-lines at 20, 24 and 43 weeks of age. However, differences were found significant in terms of body weight at 20, 24 and 43 weeks of age in pure-lines. Lines reached the first laying age at 172 days in NLS, and at 165 days of age in ELS. The 50% yield age was realized at 184 d and 176 d of age in parallel with the first laying age. The effects of light stimulation age on egg yield and hatching egg yield were found significant. In NLS treatment all pure-lines, 5 more eggs were produced in egg yield and hatching egg yield. However, differences in egg yield and weight in pure-lines were found significant. The study results showed that the egg production can be increased by first light stimulation at the 20 weeks of age, provided that at least 2 kg live weight is achieved in broiler pure-lines.

THE INFLUENCE OF RESTRICTED FEED INTAKE OF CONFINEMENT-REARED PULLETS ON THEIR PERFORMANCE DURING THE LAYING PERIOD

1962 ◽  
Vol 42 (1) ◽  
pp. 95-101 ◽  
Author(s):  
E. E. Gardiner ◽  
T. M. MacIntyre
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Egg Production ◽  
Egg Size ◽  
Experimental Period ◽  
Feed Consumption ◽  
Feed Restriction ◽  
Measurable Effect ◽  
Growing Period ◽  
Restricted Feed Intake

Two experiments were conducted to measure some of the effects of varying the length and the degree of feed restriction of confinement-reared pullets on laying-house performance. In general, increases in the length of time of restriction were followed by an increase in the number of days required to reach 50 per cent production, an increase in the initial egg size (first 8000 eggs), and a decrease in body weight at either 21 or 22 weeks of age. Feed restriction, in most cases, changed the pattern of egg production so that the birds came into production later than full-fed birds but subsequently "peaked" at a higher rate of production and maintained a higher rate of production for the remainder of the experimental period. Restricting the feed intake of the growing pullets resulted in a substantial feed saving during the growing period, but had no measurable effect on feed consumption during the laying period.

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