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ARS Home » Pacific West Area » Logan, Utah » Forage and Range Research » Research » Research Project #434136

Research Project: Grass-Legume Mixtures to Improve Pasture Productivity and Heifer Growth Performance

Location: Forage and Range Research

Project Number: 2080-21000-018-02-A
Project Type: Cooperative Agreement

Start Date: Feb 1, 2018
End Date: Jan 31, 2020

To determine the relationship between pasture productivity and nutrient content on dairy heifer growth performance and nitrate cycling.

The cooperator will conduct replicated grazing studies, using dairy heifers to complete the following: 1) determine the dairy heifer dry-matter intake (DMI) and performance (weight gain) when rotationally grazing replicated grass-legume pastures characterized by various levels of forage mass, metabolizable energy (ME), protein, fiber, digestibility, tannins, and livestock preference; 2) determine effect of total metabolizable energy, water soluble carbohydrates, and excess dietary protein from nutrient-rich pastures on dairy heifer body condition, rumen pH, Blood Urea Nitrogen and other systemic markers of growth; and, 3) determine the impact on nitrogen cycling in response to grazing grass-legume mixtures containing various protein, metabolizable energy, and tannin levels.