The Effect of Dietary Vitamin A, Ambient Temperature and Rearing Location on Growth, Feed Conversion and Vitamin Liver Storage of White Leghorn Pullets

Kurnick, A. A.; Heywang, Burt W.; Hulett, B. J.; Vavich, M. G.; Reid, B. L.

doi:10.3382/ps.0431582

Cited by 4 publications

(3 citation statements)

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“…Page, Erwin and Nelms (1959) showed that heat and solar radiation increased loss of liver vitamin A in the bovine. Similarly Kurnick, Heywang, Hulett, Vavich and Reid (1964) showed that pullets had greater vitamin A stores during winter. Anderson, Hubbert and Roubicek (1964) showed that the liver vitamin A concentration, calculated as /xg./g.…”

Section: Introductionmentioning

confidence: 97%

Seasonal influence on vitamin a alcohol concentration in chick liver

Nir

Ascarelli

1966

British Poultry Science

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Section: Introductionmentioning

confidence: 97%

Seasonal influence on vitamin a alcohol concentration in chick liver

Nir

Ascarelli

1966

British Poultry Science

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“…after six weeks of age in chicks reared from two to six weeks of age on three levels of vitamin A per kg of diet (750, 1500, or 3000 IU) at temperataures of 21 to 25 C and 28 to 35 C. Kurnick et al (1964) reported that White Leghorn pullet chicks showed a numerical, but not significant, improvement in growth when dietary vitamin A was increased from 500 to 3000 IU/4.5 3 kg of diet up to 10 or 20 weeks of age. In every instance, the authors observed a responsive increase in vitamin A stored in the liver of pullets as their dietary vitamin A increased.…”

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confidence: 99%

Temperature and Vitamin Requirements of the Domestic Fowl ,

Moreng

1980

Poultry Science

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The basic vitamin requirements of the bird must be more clearly established before the true effects of temperature can accurately be measured. Although the literature reveals progress, the knowledge gained (as in many other fields of scientific investigation) is spotty, contradictory, vague, and intriguing, providing a basis for further planned comprehensive investigation. A review of literature leads to some general conclusions on the effects of temperature on vitamin requirements. 1) Feed consumption regulates vitamin intake, and feed consumption is closely moderated by environmental temperature, both high or low and to a varied extent. 2) Factors involved in management, growth, egg production, light, etc. are very influential interactions. 3) High environmental temperature and subsequent heat stress will result in altered availability and utilization of specific nutrients. 4) There are factors regulating nutrient intake that relate to utilization, such as energy-protein ratio, management, age of bird, and genetic composition of the bird. 5) Care and treatment of feed, age, storage conditions, pelleting, and characteristics of the ingredients are important influences.

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“…Kurnick et al (1964) reported dietary vitamin A requirement for pullets during the first 20 weeks of life under various conditions of ambient temperature and rearing location; measurements of feed conversion and vitamin liver storage of vitamin A were compared also. Kurnick et al (1964) reported dietary vitamin A requirement for pullets during the first 20 weeks of life under various conditions of ambient temperature and rearing location; measurements of feed conversion and vitamin liver storage of vitamin A were compared also.…”

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confidence: 99%