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Medientyp:
E-Artikel
Titel:
39 Effects of increasing iron dextran dosage at birth on the hematological profile and growth performance of piglets during the lactation period
Beteiligte:
Chevalier, Tyler B;
Monegue, Harold J;
Lindemann, Merlin D
Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>The objective of the experiment was to critically monitor the blood profile and growth performance of piglets during the lactation period after receiving various amounts of injectable iron at birth. A total of 70, newborn pigs (initial BW 1.51 ± 0.26 kg) from 7 litters were assigned to 1 of 5 iron dosage treatments on d 0. Injectable iron dosage treatments were 0, 50, 100, 200, and 300 mg iron from iron dextran. BW and blood samples were collected on d 0, 1, 2, 3, 4, 6, 8, 11, 14, 17, and 22 (weaning) and blood was analyzed for a complete blood count (CBC). Blood was only sampled from 50 of the 70 pigs as the pigs not sampled were used for tissue collection at weaning and postweaning. Data were analyzed as repeated measures using the individual pig as the experimental unit. As early as d 1 after the injection, hemoglobin concentration (Hb) improved (linear: P &lt; 0.05). The Hb response was both linear (P &lt; 0.001) and quadratic (P ≤ 0.01) from d 3 through weaning at d 22. For the 50 and 100 mg iron treatments, Hb peaked at d 6, whereas Hb for the 200 and 300 mg iron treatments peaked on d 17. Other CBC measures followed a similar pattern of improvement from d 2-3 through weaning as the iron dosage increased. Average daily gain was greater (linear: P = 0.04 and quadratic: P = 0.05) from d 0 to 22 which, in turn, led to a linear improvement (P ≤ 0.05) in weaning BW. Increasing iron injection dosage at birth leads to an improved blood profile and greater ADG during the nursing period (d 0-22). The dosage provided also affects the timing and magnitude of the peak Hb response.</jats:p>
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