Effect of iron injection strategies for suckling piglets on pre- and post-weaning growth performance and hematocrit levels

Gabriella Lima; Clara M Lemanski; Ana N Rank; Young-Dal Jang

doi:10.17533/udea.rccp.v38n2a3

Authors

Gabriella Lima University of Wisconsin-River Falls
Clara M Lemanski University of Wisconsin-River Falls
Ana N Rank University of Wisconsin-River Falls
Young-Dal Jang University of Wisconsin-River Falls - University of Georgia

DOI:

https://doi.org/10.17533/udea.rccp.v38n2a3

Keywords:

anaemia, body weight, growth, hematocrit, injection, iron, newborn, oxidative stress, pig, postweaning

Abstract

Background: A single, 200-mg iron injection for newborn pigs is a common practice in swine production. It is required to provide sufficient iron for newborn pigs while avoiding the potential risk of excessive amount of iron causing oxidative stress. Objective: To evaluate the quantity and timing of a single or second iron injection into suckling piglets on growth performance and hematocrit levels. Methods: A total of 24 piglets from four litters were used in each experiment (3). Treatments were: Experiment 1- 1) Control: 150 mg iron injection at d 1-3 of age, 2) Iron14: additional 100 mg iron injection at 14 d before weaning, and 3) Iron7: additional 100 mg iron injection at 7 d before weaning; Experiment 2- 1) Control: 100 mg iron injection at d 1-3 of age, 2) Iron100/100: 100 mg iron at d 1-3 of age and 9 d after the first injection, and 3) Iron200: 200 mg iron injection at d 1-3 of age; and Experiment 3 (at d 3-4 of age)- 1) Fe100: 100 mg iron injection, 2) Fe200: 200 mg iron injection, and 3) BW200: 125 mg iron injection/kg body weight. Pigs were weaned at d 25-28 of age. Growth performance and hematocrit levels were measured until d 13-14 postweaning. Results: In Experiment 1, the Iron14 treatment had a greater final body weight than the control treatment (p=0.07). Hematocrit levels were greater in the Iron14 (p=0.10) and Iron7 (p<0.05) treatments than in the control treatment at d 14 postweaning. In Experiment 2, average daily gain in the postweaning period was greater in the Iron100/100 treatment than in the control (p<0.05) and Iron200 (p=0.08) treatments. Hematocrit levels in the Iron200 treatment were greater than those in the control treatment (p<0.05) at d 13 postweaning. In Experiment 3, there was no difference in growth performance, but the BW200 treatment increased hematocrit levels to a greater degree than the Fe200 treatment (p<0.10). Conclusion: An additional iron injection earlier and a split iron injection to newborn pigs could benefit postweaning growth, but not by body weight-based iron injection. Hematocrit levels increase with a greater dose of iron injected although the magnitude varies depending on injection strategies.

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Author Biographies

Gabriella Lima, University of Wisconsin-River Falls

Department of Animal and Food Science, University of Wisconsin-River Falls, River Falls, WI 54022, USA
https://orcid.org/0009-0002-1263-2585

Clara M Lemanski, University of Wisconsin-River Falls

Department of Animal and Food Science, University of Wisconsin-River Falls, River Falls, WI 54022, USA
https://orcid.org/0000-0001-6767-6994

Ana N Rank, University of Wisconsin-River Falls

Department of Animal and Food Science, University of Wisconsin-River Falls, River Falls, WI 54022, USA
https://orcid.org/0009-0000-1019-4740

Young-Dal Jang, University of Wisconsin-River Falls - University of Georgia

Department of Animal and Food Science, University of Wisconsin-River Falls, River Falls, WI 54022, USA
Department of Animal and Dairy Science, University of Georgia, GA 30602, USA
https://orcid.org/0000-0001-8403-1231

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