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Related Experiment Videos

Low-phytic acid corn improves nutrient utilization for growing pigs.

T L Veum1, D R Ledoux, V Raboy

  • 1Department of Animal Sciences, University of Missouri, Columbia, MO 65211-5300, USA. veumt@missouri.edu

Journal of Animal Science
|January 5, 2002
PubMed
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Low-phytate hybrid corn (LPC) significantly improves phosphorus availability and pig growth performance compared to normal hybrid corn (NC). Supplementing NC diets with inorganic phosphorus equalized nutritional value, but LPC still reduced phosphorus excretion in swine waste.

Area of Science:

  • Animal Nutrition
  • Agricultural Science
  • Biochemistry

Background:

  • Phytate in corn significantly reduces phosphorus (P) and calcium (Ca) bioavailability in swine diets.
  • Low-phytate hybrid corn (LPC) offers a potential solution to improve P utilization and reduce environmental P excretion.
  • Understanding P availability differences between LPC and normal hybrid corn (NC) is crucial for optimizing swine nutrition.

Purpose of the Study:

  • To compare the P availability and nutritional value of LPC and NC in growing pigs.
  • To evaluate the impact of LPC and NC on growth performance, nutrient retention, and bone characteristics.
  • To assess the effect of LPC on P excretion in swine waste.

Main Methods:

  • Thirty-five crossbred barrows were fed semipurified and practical corn-soybean meal diets containing either NC or LPC.

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  • Diets were formulated to compare different P levels and included treatments with and without inorganic P supplementation.
  • Measurements included growth performance, bone breaking strength, P, Ca, and N absorption and retention, and P excretion.

    • Main Results:

    • Pigs fed LPC exhibited superior growth performance, bone strength, P and Ca retention, and N retention compared to those fed NC in semipurified diets.
    • Supplementing NC diets with inorganic P to match LPC's available P levels resulted in similar performance, indicating equal nutritional value after adjustment.
    • LPC significantly reduced P excretion by 50% in semipurified diets and 18.4% in practical diets compared to NC.

    Conclusions:

    • Low-phytate hybrid corn significantly enhances P availability and nutritional value for growing pigs.
    • The use of LPC in swine diets can substantially decrease phosphorus excretion, mitigating environmental concerns.
    • Adjusting for phytate levels, both corn hybrids offer comparable nutritional value, but LPC provides inherent advantages in P utilization and waste reduction.