The Effects of Altering the Protein Efficiency of Lactating Dairy Cows on the Whole-Farm Nitrogen Efficiency of Dairy Farms

Project Overview

Project Type: Research and Education
Funds awarded in 1999: $19,184.00
Projected End Date: 12/31/1999
Region: Western
State: Utah
Principal Investigator:

Annual Reports


  • Animals: bovine
  • Animal Products: dairy


  • Animal Production: animal protection and health, manure management
  • Crop Production: nutrient management


    Software had been previously developed to quantify nitrogen and phosphorus balances on
    livestock farms in Maryland, and was beta tested in the western region. This software
    was distributed via the internet to users in 25 states and 27 countries. Our lab assisted
    with development of two papers on use of the software to characterize nutrient balances
    in the western region of the US. Our lab also tested the use of MUN on dairy farms in
    Maryland. We updated comprehensive web pages that disseminate information on
    reducing nutrient losses from agriculture, especially dairy fms.

    Project objectives:

    1. The objectives of the overall project are as follows:
      1) to verify the usefulness of milk urea nitrogen (MUN) analysis for accurately
      predicting aspects of N metabolism,
      2) to detennine the potential use of herd MUN averages and recently developed
      computer worksheets for predicting N losses and whole-farm efficiencies on
      commercial dairies in UT and ID, and
      3) to disseminate all results to dairy producers, extension personnel and scientists via
      extension publications, the World Wide Web, and peer-reviewed journal articles.
      Our contribution to the overall project is based on the following specific objectives:
      1) to improve computer worksheets for calculating whole fmba lances by adapting
      them to the western region and by implementing changes identified by using the
      worksheets in this region,
      2) to assist with evaluation and improvement in MUN analysis based on research
      conducted at Utah State University, and
      3) to disseminate information from this project to fmers via extension publications and
      the World Wide Web.
    Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.