Evaluation of an amino acid-iron chelate hematinic for the baby pig

Brady, P.S.; Ku, P.K.; Ullrey, D.E.; Miller, E.R.

Journal of Animal Science 47(5): 1135-1140


ISSN/ISBN: 0021-8812
PMID: 750560
DOI: 10.2527/jas1978.4751135x
Accession: 005396097

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A series of 5 experiments was conducted to evaluate and investigate mode of transfer of an amino acid chelated Fe fed to the sow as a hematinic for the baby pig. In the 1st experiment, > 3000 ppm Fe were provided to 1/2 the sows daily as the amino acid chelate (FeP) from late gestation through 3 wk of lactation. Mean Hb among pigs of FeP-fed sows was 8.5 g/dl by 2 wk of lactation compared to 5.9 for pigs of sows not on the experimental diet. Sow milk Fe was elevated by the 2nd wk of lactation (1.4 vs. 2.6 ppm). This elevation does not account for the maintenance of pig Hb. In experiment 2, sows were fed in the farrowing crates or out of the crates to eliminate pig access to sow feed. The same dietary regimens were employed again. Pigs from FeP-fed sows maintained adequate Hb, regardless of sow feeding site. Milk Fe was elevated to the same extent as in experiment 1. Fecal contamination was apparently the major route of transfer from sow to pig. In the remaining experiments, lower levels of Fe from FeP were used. In experiment 3, 250 and 500 ppm Fe as FeP were compared to 500 ppm Fe as FeSO4 in the sow diet. FeP and FeSO4 at 500 ppm Fe proved marginally adequate in maintaining pig Hb. Experiments 4 and 5 investigated effects of the quantity of feed provided daily in late gestation to the sow on the efficacy of the lower levels of FeP. Incresing sow feed did not enhance the effect of 250 or 500 ppm Fe as FeP on the pig Hb. In all cases where the lower levels of FeP were fed, pig Hb was at best marginal.