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June 10, 2026AnimalsOpen Access

Ruminal pH Dynamics and Milk Production Response to Concentrate Supplementation in Pasture-Based Dairy Cows

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Authors

RRRomina Rodríguez-PereiraNUNatalie L. UrrutiaEUEmilio M. Ungerfeld

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Overview

Randomized trial evaluates milk production effects of concentrated feed in pasture-fed dairy cows, indicating improved productivity without ruminal stability loss.

Key Points

  • This study aims to assess the impact of concentrate supplementation on ruminal pH dynamics and milk production in grazing dairy cows.
  • Assigned 8 Holstein–Friesian cows to a 2-period crossover design comparing pasture-only diet and pasture with grain-based concentrate supplementation.
  • Each period lasted 28 days with 21 days for adaptation and 7 days for measurements.
  • Measured ruminal pH and production indicators after feeding the cows fresh perennial ryegrass.
  • Concentrate supplementation decreased minimum ruminal pH from 6.15 to 5.97 but remained above the SARA threshold.
  • Total dry matter intake increased by 3.5 kg/d and milk yield improved by 3.85 kg/d.
  • Concentrate supplementation enhanced milk protein concentration, with no significant impact on milk fat or fatty acid profile.

Cite This Study

Rodríguez-Pereira et al. (2026) studied this question.

synapsesocial.com/papers/6a28fef66f82f25be989c1bdhttps://doi.org/10.3390/ani16121771
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