Relative Value of Vitamin A and Carotene for Supplying the Vitamin A Requirements of Swine during Gestation and Beginning Lactation

Parrish, D.B.; Aubel, C.E.; Hughes, J. S.; Wheat, J. D.

doi:10.2527/jas1951.102551x

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Various factors such as dietary nitrates or nitrites can, however, reduce liver vitamin A stores (Seerley et al, 1965). A dietary concentration of 7,000 IU of vitamin A per day was adequate to maintain serum and liver vitamin A concentrations in reproducing female pigs (Parrish et al, 1951).…”

Section: Discussionmentioning

confidence: 97%

Vitamin and mineral transfer during fetal development and the early postnatal period in pigs.

Mahan

Vallet

1997

Journal of Animal Science

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There are periods during pregnancy when sows may have a temporally high requirement for certain vitamins and minerals. Proteins transferring retinol and Fe to the developing pig fetus have been discovered, whereas transport mechanisms for other vitamins and minerals are probably present but have not yet been identified. Sow body tissues can serve as a reservoir for many micronutrients, but it is not known whether these reserves can supply an adequate quantity during critical fetal developmental periods. There is a low placental transfer of vitamin E to the fetus even if the dietary concentration fed to a gestating animal is high, but colostrum and milk concentrations can be increased when the nutrient is fed to sows. If the dam's diet contains inadequate Ca or P, the concentration of these elements in the developing fetus and milk will not be affected. Consequently, sow bone demineralization will occur under conditions of dietary inadequacy of Ca and P. Other nutrients can be depleted from sow tissue reservoirs over several parities (e.g., Se), resulting in low quantities being provided in the milk for nursing pigs. Scientific information involving adequate vitamin and mineral nutrition for female pigs to improve conception rate and embryonal survival that will result in optimum fetal and postnatal pig development can be considered to be in its infancy.

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Section: Discussionmentioning

confidence: 97%