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Technological Solutions to Decrease Protein Content in Piglet Weaning Feed, Improving Performance, Gut Efficiency,

Michele Lanzoni1, Paul De Smet2, Giovanni Ferrari3

  • 1DVM, Nutritionist and Farm Consultant, 47032 Bertinoro, Italy.

Animals : an Open Access Journal From MDPI
|June 26, 2025
PubMed
Summary
This summary is machine-generated.

Innovative low-protein diets for piglets improved growth and feed efficiency. Replacing animal-derived ingredients with amino acids in piglet feed enhanced performance and nitrogen retention.

Keywords:
amino acidslow-protein dietnitrogen efficiencyweaning feed

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Area of Science:

  • Animal Nutrition
  • Swine Production
  • Feed Science

Background:

  • Traditional piglet diets often rely on fish meal and blood derivatives.
  • Optimizing nutrient utilization and reducing reliance on animal-by-products are key challenges in swine nutrition.

Purpose of the Study:

  • To evaluate the efficacy of low-protein diets devoid of fish meal and blood derivatives in weaned piglets.
  • To compare the growth performance and nitrogen retention of piglets fed conventional versus novel low-protein diets.

Main Methods:

  • 180 weaned piglets were divided into three groups: control (fish meal, blood plasma), T1 (low-protein, with fish meal and blood plasma), and T2 (low-protein, without fish meal and blood plasma).
  • Diets were administered in two phases post-weaning, and key performance indicators including average weight, average daily gain (ADG), and feed conversion ratio (FCR) were monitored.
  • Nitrogen retention was measured to assess nutrient utilization.

Main Results:

  • Both T1 and T2 diets resulted in significantly higher average weight, ADG, and improved FCR compared to the control during the first phase.
  • The T2 group demonstrated sustained superior weight, ADG, and FCR over the control group throughout the entire trial period.
  • The T2 diet led to significantly higher nitrogen retention (58.71%) compared to T1 (54.13%) and the control (54.02%).

Conclusions:

  • A low-protein diet formulated without animal-derived ingredients (T2) is highly effective for weaned piglets.
  • This innovative feeding strategy enhances piglet performance and nitrogen utilization.
  • Eliminating fish meal and blood derivatives in favor of essential amino acids offers a more efficient and potentially sustainable approach to swine nutrition.