The Effect of Dietary Fat, Caloric Intake and Protein Level on Caged Layers

McDaniel, A. H.; Quisenberry, J. H.; Reid, B. L.; Couch, J. R.

doi:10.3382/ps.0380213

Cited by 13 publications

(4 citation statements)

References 11 publications

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“…Thornton et al (1957) reported that feeding rations in which the C/P ratios varied from 50 to 86:1 had no effect on rate of egg production. A similar lack of response by the laying hen to varying C/P ratios has been observed by MacIntyre and Aitken (1957), Touchburn andNaber (1959), andMcDaniel et al (1959).…”

Section: C Effect Of Energy Level Of the Ration On Egg Productionsupporting

confidence: 82%

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Effect of energy and amino acid levels on protein requirements of poultry /

McDonald¹

1960

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Section: C Effect Of Energy Level Of the Ration On Egg Productionsupporting

confidence: 82%

“…1957;Miller et al. 1957;MacIntyre and Aitken, 1957;and McDaniel et al. 1959) have also reported that efficiency of egg production is more or less proportional to the productive energy level of the ration.…”

Section: C Effect Of Energy Level Of the Ration On Egg Productionmentioning

confidence: 97%

Effect of energy and amino acid levels on protein requirements of poultry /

McDonald¹

1960

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“…Most studies (Lorenz et al, 1938;Price et al, 1957;Weiss and Fisher, 1961;McDaniel et al, 1959) did not show clear-cut nutritional influences on the level of liver fat. Barton et al (1966) reported that a fatty liver condition was produced by using a diet containing 15% protein and 3,000 calories of metabolizable energy per kilogram.…”

mentioning

confidence: 94%

Effect of Choline, Methionine and Vitamin B12 on Liver Fat, Egg Production and Egg Weight in Hens

et al. 1969

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“…This confuses the interpretation of energy requirement studies, and under these conditions results have been equivocal. Egg production has been reported to decrease (Quisenberry and Bradley, 1962;Santana and Quisenberry, 1968;Gleaves et al, 1968;Grover et al, 1972), to increase (Harms et al, 1957;Petersen et al, 1960) or not to change (Berg and Bearse, 1956;Mac-Intyre and Aitken, 1957;Hochreich et al, 1958;McDaniel et al, 1959;Treat et al, 1960;Gordon et al, 1962;Heywang and Vavich, 1962;March and Biely, 1963;Bragg and Hodgson, 1969) as dietary energy level increased.…”

Section: Introductionmentioning

confidence: 92%

Effect of Dietary Energy Concentration on Performance of Heavy Egg-Type Hens at Various Densities in Cages

1976

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Three dietary energy levels (2,737, 3,003, 3,322 kcal./kg.) were fed to heavy egg-type hens housed in cages at densities of 1,320, 660, and 440 cm. 2 of floor area per hen.Increasing the number of hens per cage reduced egg production. This was most pronounced with three hens per cage during the latter part of the experiment. Final body weight was reduced only with three hens per cage, and occurred to a greater degree at the end of the experiment. Mortality increased at the higher hen densities due to Marek's disease and lymphoid leucosis. Hen density did not significantly affect egg weight, shell strength, Haugh units or meat and blood spots.Dietary energy level did not significantly alter overall hen-day egg production. However, egg production on the highest dietary energy level declined more rapidly in the latter months. Therefore, a high dietary energy content was not conducive to sustained egg production.There were no significant interactions between hen density and dietary energy level. But, with two or three hens per cage, egg production was consistently lower for hens fed the highest dietary energy level.As dietary energy level increased, feed intake decreased and feed efficiency increased. But energy intake increased resulting in heavier hens on the highest energy ration.The highest dietary energy caused an increase in egg size during the mid-part of the experiment. Otherwise, energy level did not affect egg weight, shell strength, Haugh units or blood and meat spots.It is concluded that although increases in dietary energy levels result in increased energy intakes and body weights of hens, high energy rations will not reverse the downward trend in egg production as density of caged hens increases. To the contrary, feeding of high energy rations to hens housed at high densities in cages may not be advisable, since egg production was consistently lowest under these conditions.

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The Effect of Dietary Fat, Caloric Intake and Protein Level on Caged Layers

Cited by 13 publications

References 11 publications

Effect of energy and amino acid levels on protein requirements of poultry /

Effect of energy and amino acid levels on protein requirements of poultry /

Effect of Choline, Methionine and Vitamin B12 on Liver Fat, Egg Production and Egg Weight in Hens

Effect of Dietary Energy Concentration on Performance of Heavy Egg-Type Hens at Various Densities in Cages

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