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High phytase doses impact broiler and pig gastric pH, with real-time pH capsules proving valuable for determining optimal phytase levels. Phytase tended to improve pig feed conversion but did not significantly affect broiler performance.

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Area of Science:

  • Animal Nutrition
  • Digestive Physiology

Background:

  • Phytase supplementation is common in animal diets to improve phosphorus availability.
  • Understanding phytase's effect on gastric pH is crucial for optimizing nutrient digestibility and animal performance.
  • Dietary phase changes can significantly impact gastric pH and nutrient utilization.

Purpose of the Study:

  • To investigate the effects of high phytase doses on growth performance and gastric pH in broiler chickens and pigs.
  • To evaluate the efficacy of real-time gastric pH measurements using Heidelberg pH capsules.
  • To determine the optimal phytase dosage for modulating gastric pH and improving animal performance.

Main Methods:

  • Two experiments were conducted with broiler chickens (576) and pigs (64), fed diets with varying phytase levels (0-2500 FTU/kg).
  • Heidelberg pH capsules were used for real-time gastric pH monitoring in both species.
  • Growth performance parameters and feed conversion ratios were recorded throughout the study.

Main Results:

  • Phytase supplementation did not significantly affect broiler performance but showed a trend towards improved feed conversion in pigs.
  • Phytase at 500-1500 FTU/kg increased broiler gizzard pH; 2500 FTU/kg lowered it.
  • Pigs supplemented with 2500 FTU/kg phytase maintained gastric pH during dietary phase changes, unlike controls.

Conclusions:

  • High phytase doses can modulate gastric pH in broiler chickens and pigs.
  • Real-time pH capsule technology is a valuable tool for assessing phytase dose-response effects on gastric pH.
  • Phytase supplementation may enhance gastric pH stability during critical feeding phases in pigs.