Vitamin C Supplementation to Hens’ Diets in a Hot Climate

Perek, M.; Kendler, J.

doi:10.3382/ps.0410677

Cited by 27 publications

(8 citation statements)

References 7 publications

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“…Finally supplementation of yiL C has not altered the transport related mortality significantly. These findings are not in agreement with preyious reports (14,18,19,20):…”

Section: Ul"su1t"contrasting

confidence: 57%

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EFFECT OF VITAMIN C SUPPLEMENTATJON ON TRANSPORT MORTALITY. LlVE WEIGBT AND CARCASS YIELD OF BROILERS*

Gürer¹,

Özdemir²,

Erbaş³

1990

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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“…Finally supplementation of yiL C has not altered the transport related mortality significantly. These findings are not in agreement with preyious reports (14,18,19,20):…”

Section: Ul"su1t"contrasting

confidence: 57%

“…C Illay inhibit steroidogenessis (14,16). In this aspect, the most spectacular reports have been done İn mortality decrease by vi t. C suppIemantation (14,18,19,20). These same findings have been rcported also in laying thens (1,2).…”

Section: ıNtroıiuctionmentioning

confidence: 99%

EFFECT OF VITAMIN C SUPPLEMENTATJON ON TRANSPORT MORTALITY. LlVE WEIGBT AND CARCASS YIELD OF BROILERS*

Gürer¹,

Özdemir²,

Erbaş³

1990

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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“…However, the responses of poultry to supplemental ascorbic acid have been inconsistent (Scott, 1975;Pardue and Thaxton, 1986). Several investigators observed positive effects of ascorbic acid on shell strength (Thornton and Moreng, 1958;Perek and Kendler, 1962;El-Boushy and van Albada, 1970;Peebles and Brake, 1985;Bell and Marion, 1990;Balnave et al, 1991;Orban et al, 1993;Zapata and Gernat, 1995). Based on these reports, the relationship of vitamin C to vitamin D metabolism (Weiser et al, 1988) and the assumption that vitamin C synthesis is inadequate, supplemental vitamin C is recommended to improve shell quality.…”

Section: Introductionmentioning

confidence: 90%

Ascorbic acid biosynthesis in hens producing strong and weak eggshells

Maurice

Lightsey²,

Toler

2004

Br. Poultry Sc.

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1. An experiment was conducted with two strains of layers to ascertain whether the reduction in eggshell strength occurring at the end of the production cycle is the result of reduced ascorbic acid biosynthesis. 2. Hens producing strong and weak eggshells were identified within each strain and egg production, egg weight, per cent shell, shell surface density, plasma, adrenal and hepatic ascorbic acid and renal L-gulonolactone oxidase activity were measured. 3. The strains differed in ascorbic acid synthesis, as measured by L-gulonolactone oxidase activity, and tissue ascorbic acid concentration. 4. Comparison of results from birds producing eggs of similar weight but markedly different in shell strength detected neither a shell strength group x strain interaction nor an effect of shell strength group on plasma and hepatic ascorbic acid and activity of L-gulonolactone oxidase. 5. The results did not support the hypothesis that tissue ascorbate and ascorbic acid biosynthesis are reduced in old hens producing weak eggshells.

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“…Perek, Eckstein and Eshkol (1959) demonstrated that birds deplete their adrenal ascorbic acid when injected with ACTH in the same way as mammals. Wawrzyniak (1956) obtained earlier spermatogenesis and better development of the testes in cockerels after injections of vitamin C. Perek and Kendler (1962) obtained highly significant increases in egg production and reduced mortality rates of hens whose diet was supplemented with different levels the experiment. The addition of vitamin C to the experimental group increased its volume of semen as compared to controls.…”

Section: Seasonal Variations In Semen Production Of Different Breeds mentioning

confidence: 95%

“…Birds can normally synthesise their requirements of vitamin C, but Perek and Kendler (1962) obtained a highly significant beneficial effect on the egg production of hens, during the hot summer months, by vitamin C supplementation. Zanelli (1958) noted higher weight gains and earlier maturity of vitamin C-treated male chicks of 7-60 days of age.…”

mentioning

confidence: 99%