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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: 2080-21000-016-03-A
Project Type: Cooperative Agreement

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

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

Approach:
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.