Utilization of Calcium from Calcium Sulfate by Chicks and Laying Hens

Hurwitz, S.; Rand, N. T.

doi:10.3382/ps.0440177

Cited by 11 publications

(3 citation statements)

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“…Medullary bone is a very labile type of bone (Hurwitz, 1965;Simkiss, 1967) and it has been generally held that this is used specifically to store Ca for use in reproduction (Petersen, 1965;Simkiss, 1967;Clark & Simkiss, 1980;Taylor, 1970~1, 1980Speers, 1970) thus acting as a buffer when dietary supplies of Ca are insufficient. However, this view has been questioned by Simkiss (1975).…”

Section: Symposium Proceedings I983mentioning

confidence: 99%

Calcium and reproductive function in the hen

Gilbert

1983

Proc. Nutr. Soc.

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The relationship between nutrition and physiology is intriguing and, when considered closely, may have wider implications than at first thought. To illustrate this statement, I wish to consider, in a representative bird, what may be regarded as a relatively simple dietary constituent.As in mammals, the domestic hen requires calcium for normal metabolic function and for bone formation during growth. Maintenance requirements are relatively similar to those for mammals and, for both hens and cocks, are (Berg et al. 1964). However, the hen differs from the mammal because reproduction in birds is accomplished through the production of an egg with a calcified shell.There is now extensive literature on Ca metabolism, though most concerns the domestic fowl. Much is known of the requirements for Ca, the role of the digestive tract, absorption from the tract, the importance of medullary bone, shell formation and the relationship between dietary Ca and shell calcification (Taylor

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Section: Symposium Proceedings I983mentioning

confidence: 99%

Calcium and reproductive function in the hen

Gilbert

1983

Proc. Nutr. Soc.

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“…Since no such growth depression occurred in the previous study (Hurwitz and Rand, 1965) in which the gypsum levels used were about three times as high, it appeared that the growth depression may be due to the presence of a toxic contaminant in the gypsum. Fluoride seemed to be a probable contaminant of this nature.…”

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confidence: 71%

“…Aver-Gypsum (calcium sulfate) has been recently used as a substitute for limestone in poultry rations in order to facilitate the utilization of dietary antibiotics (Eoff et al, 1962). It was shown by early investigators (Bethke et al, 1930) and recently by us (Hurwitz and Rand, 1965) that the availability of calcium from dehydrated gypsum was similar but somewhat lower than that of limestone. No effect on body weight gain in chicks could be observed even when dietary gypsum exceeded 4%.…”

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confidence: 99%