Asian-Australasian Journal of Animal Sciences (아세아태평양축산학회지)

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Relative Availability of Iron in Mined Humic Substances for Weanling Pigs

  • Kim, S.W. (Dept. of Animal & Food Sciences, Texas Tech University) ;
  • Hulbert, L.E. (Department of Animal and Food Sciences, Texas Tech University) ;
  • Rachuonyo, H.A. (Department of Animal and Food Sciences, Texas Tech University) ;
  • McGlone, J.J. (Department of Animal and Food Sciences, Texas Tech University)
  • Received : 2003.12.09
  • Accepted : 2004.05.25
  • Published : 2004.09.01

Abstract

Humic substances include several biological active and inactive compounds that are commonly used for improving soil fertility. Use of humic substances in swine diets is a novel concept. Humic substances contain 8,700 mg/kg of iron but its bioavailability is unknown. This study was conducted to test the bioavailability of iron in humic substances for nursery pigs. One hundred twenty five pigs (Newsham, Colorado Springs, CO) were not given supplemental iron while nursing for 21 d. Pigs were weaned on d 21 and allotted to one of five treatments (four control treatments with different levels of supplemented iron; 0, 30, 70 and 88 mg/kg from ${FeSO}_4$ and one treatment with 70 mg/kg iron from humic substances). Pigs were fed diets for 5 wk ad libitum and water was accessible freely. Body weight and feed intake were measured weekly. Blood samples were taken from pigs on d 28 to measure the number of red blood cells and hemoglobin concentration. Pigs fed a diet with the humic substances grew faster (p<0.05) during the first week postweaning, but performance was not different during the entire 5 wk period. Feed intake and gain/feed were the same among treatments. The slope ratio technique was used to estimate relative iron bioavailability. The concentration of blood hemoglobin did not respond to dietary iron levels using this model. However, the number of red blood cells (106/$\mu$l) was modeled by 4.438+0.017${\times}$ 'ron (mg/kg) from ${FeSO}_4$'0.012${\times}$'ron (mg/kg) from the humic substances' Based on the comparison between the slopes (0.012 from humic substances and 0.017 from ${FeSO}_4$), iron in humic substances was 71% as available as the iron in ${FeSO}_4$. The slopes for dietary feed intake of ${FeSO}_4$ and the iron in humic substances did not differ (p>0.05). Humic substances can replace ${FeSO}_4$ as an alternative iron source for pigs at 71% relative bioavailability.

Keywords

Bioavailability;Humic Substances;Iron;Nursery;Pigs

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References

  1. Aiken, G. R., D. M. McKnight, R. L. Wershaw and P. MacCarthy. 1985. Humic substances in soil, sediment, and water: geochemistry, isolation, and characterization. John Wiley & Sons, New York. pp. 13-86.
  2. Kim, S. W. and R. A. Easter. 2001. Evaluation of various fish meals as a protein source in young pig diets. J. Anim. Sci. 79:1829-1839.
  3. Lewis, A. J., P. S. Miller and C. K. Wolverton. 1996. Bioavailability of iron in two different sources for weanling pigs. Nebraska Swine Report. pp. 22-24.
  4. Littell, R. C., P. R. Henry, A. J. Lewis and C. B. Ammerman. 1997. Estimation of relative bioavailability of nutrients using SAS procedures. J. Anim. Sci. 75:2672-2683.
  5. NRC. 1998. Nutritional Requirements of Pigs. $10^{th}$ ed. Natl. Acad. Press, Washington, DC.
  6. Cavill, I. 2002. Erythropoiesis and iron. Best Pact. Clin. Haematol. 15:399-409.
  7. Harmon, B. G., D. E. Hoge, A. H. Jensen and D. H. Baker. 1969. Efficacy of ferrous carbonate as a hematinic for young swine. J. Anim. Sci. 29:706-710.
  8. Howard, E. B. and G. Matsumoto. 1977. Laboratory Procedures. In: Animal Health and Technology: A text for veterinary aides. American Veterinary Publication, Inc., USA. pp. 227-296.
  9. Shi, Y., D. B. Parker, N. A. Cole, B. W. Auvermann and J. E. Mehlhorn. 2001. Surface amendments to minimize ammonia emissions from beef cattle feedlots. Trans. Am. Soc. Agric. Engineers. 44:677-682.
  10. Stevenson, F. J. 1994. Humus Chemistry: Genesis, Composition, Reactions, $2^{nd}$ ed. John Wiley & Sons, Wiley. pp. 480-512.
  11. Balasubramaniam, P. and A. Malathi. 1992. Comparative study of hemoglobin estimated by Drabkin’s and Sahli’s methods. J. Postrad. Med. 38:8-9.
  12. Goh, K. M. and M. R. Reid. 1975. Molecular weight distribution of soil organic matter as affected by acid pre-treatment and fractionation into humic and fulvic acids. J. Soil Sci. 26:207-222.
  13. Anderson, B. K. and R. A. Easter. 1999. Bioavailability of iron in spray-dried blood cells. University of Illinois Swine Research Report. Urbana, IL. pp. 23-29.
  14. Acda, S. P., J. W. Woo, W. T. Kim, Y. H. Shim, S. H. Lee and B. J. Chae. 2002. Influence of single dose of Fe dextran administration with organic trace mineral supplementation on the performance of piglets. Asian-Aust. J. Anim. Sci. 15:1469-1474.
  15. Lee, K. and F. M. Clydesdale. 1979. Quantitative determination of the elemental, ferrous, ferric, soluble and complexed iron in foods. J. Food Sci. 44:549-554.
  16. Parvanta, I. M. Z., M. E. Cogswell and E. W. Gunter, L. M. Grummer-Strawn. 2003. Erythrocyte protoporphyrin or hemoglobin: Which is a better screening test for iron deficiency in children and women? Am. J. Clin. Nutr. 77:1229-33.
  17. Kornegay, E. T. 1972. Availability of iron contained in defluorinated phosphate. J. Anim. Sci. 34:569-572. https://doi.org/10.2527/jas1972.344569x
  18. Ndayegamiye, A. and D. Cote. 1989. Effect of long-term pig slurry and solid cattle manure application on soil chemical and biological properties. Can. J. Soil. Sci. 69:39-47.

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