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May 9, 2026Journal of Animal Science

PS4-14. The Effects of Microalgae on in vitro Ruminal Fermentation

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Authors

MBMabry BruhnPBPaige BerkmeyerLSLance Schideman

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Overview

Randomized trial evaluates the impact of microalgae on ruminal fermentation, indicating significant benefits for feed efficiency.

Key Points

  • This research aims to evaluate the effects of microalgae and their mineral content on ruminal fermentation compared to traditional feedstuffs.
  • Completely randomized design with six treatment groups and triplicate flasks.
  • Flasks contained 7% treatment, 37% alfalfa hay, and 56% corn silage on an organic matter basis.
  • Ruminal contents collected from a beef steer, incubated at 39 °C for 24 hours, analyzing pH, VFA, and NH3 at specified intervals.
  • Gas volume tended to be affected by treatment (P=0.06), with SBM producing the most gas and DDG-TETRash the least.
  • Total VFA at 24 hours was greatest for DDG-TETRash (117.37 mMol) and lowest for SBM (97.93 mMol), showing a treatment by time interaction (P=0.02).
  • NDFD was also significantly impacted (P=0.01), with DDG-TETRash showing the highest disappearance (35.43%).

Cite This Study

Bruhn et al. (2026) studied this question.

synapsesocial.com/papers/69fed090b9154b0b828779d0https://doi.org/10.1093/jas/skag107.408
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