publication . Thesis . 2012

Ruminal Nitrogen Recycling and Nitrogen Efficiency in Lactating Dairy Cattle

Aguilar, Michelle;
Open Access English
  • Published: 10 Jul 2012
  • Publisher: Virginia Tech
  • Country: United States
Excess nitrogen (N) excretion from animal agriculture results in reduced air and water quality, and poses a risk to human health. Although the dairy industry utilizes milk urea N (MUN) to monitor protein feeding and N excretion, phenotypic diversity among cows may influence MUN and thus bias feed management. An initial study using data from 2 previously published research trials and a field trial, observed that cow had a significant effect on MUN variation. Regression models, utilized to predict MUN, corrected for dietary nutrients and some animal effects, and thus the observed effect of cow on MUN variation may reflect genetic selection decisions of animals wit...
free text keywords: feeding management, milk urea nitrogen, dietary protein, nitrogen recycling
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Thesis . 2012
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