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Évaluation de l'intérêt de la supplémentation en fer en élevage porcin biologique

Abstract : This study aimed to describe haematological parameters of piglets around weaning on organic outdoor or indoor farms. Blood samples were collected from 28.9 ± 2 .6 piglets/herd at 42.0±3.2 days of age and 11.9 ± 3.0 kg live weight (mean ± SD) on 21 farms in western France. Among the 11 outdoor farms, only one had supplemented with 200 mg iron, while among the 10 indoor farms, only one had not supplemented, one had supplemented with 100 mg, eight with 200 mg and one with 400 mg. Compared to outdoor piglets without supplementation, piglets kept indoors and receiving 200 mg iron had lower haemoglobin concentration (105 vs 118 ± 2 g/L, mean ± mean SD) and red blood cell volume (56 vs 60 ± 1 fl) (P < 0.005). The reduction in haemoglobin concentration and red blood cell volume was more pronounced in indoor piglets supplemented with 100 mg of iron and even more in those that had not received iron. The plasma concentration of haptoglobin, a marker of the inflammatory state, was lower in outdoor than in indoor piglets (0.51 ± 0.06 vs 0.78 ± 0.09 g/L), whereas no effect of housing was observed on markers of oxidative stress (dROM, BAP). In the 14 farms for which sow parity was known, haemoglobin concentration was lower in piglets from primiparous than from multiparous sows (109 vs 114 ± 2 g/L, P < 0.001). In conclusion, except for farms on iron-deficient soils, piglets on outdoor farms do not require iron supplementation, unlike those raised indoors.
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https://hal.inrae.fr/hal-03164752
Contributor : Elodie Merlot <>
Submitted on : Wednesday, March 10, 2021 - 10:40:26 AM
Last modification on : Monday, May 10, 2021 - 8:27:37 AM

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Armelle Prunier, Maud Pauwels, Laëtitia Jaillardon, Mily Leblanc-Maridor, Gwendoline Hervé, et al.. Évaluation de l'intérêt de la supplémentation en fer en élevage porcin biologique. 53. Journées de la Recherche Porcine, Ifip; Inrae, Feb 2021, En ligne, France. pp.405-410. ⟨hal-03164752⟩

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