Animal and Veterinary Sciences Department
Office: 120 Poole Agricultural Center
Ph.D. Dairy Science
University of Wisconsin-Madison 2011
MS Dairy Science
University of Wisconsin-Madison 2004
Agricultural Production Engineer
Universidad Católica Argentina 2000
PES 4230-6230 Field Crops-Forages
AVS 4500 Sustainability of Livestock Systems
The overarching objectives of my research program are:
• Improve nutrient use efficiency in livestock production systems through novel (e.g. low lignin alfalfa, BMR forages, and cover crops), greater and more efficient use of high quality forages in livestock diets.
• Although some scientific literature have shown that Jerseys may convert feed resources to milk components more efficiently than Holsteins, our knowledge about nutrient requirements of Jerseys and other breeds is incomplete. Thus, identifying differences in forage requirements and overall nutrient utilization efficiency between different breeds (e.g. Holstein vs. Jersey) is an area of considerable interest to increase the efficiency of milk production. In particular, I am interested in determining how changes in dietary forage concentration and type (i.e. corn silage, grasses, and legumes) affects lactation performance, nutrient utilization and excretion, between different breeds.
The outcomes of the proposed research activities will contribute to improving the efficiency of forage utilization by livestock (conversion of feed N and C into milk and meat) and reduce the release of labile C and N to the environment due to the inefficiency of production (conversion of feed N and C into animal “waste”). In addition, it will help protect air, water quality, and reduce consumer’s concerns about the environmental impact of animal production (e.g., carbon footprint of milk, and N-related water and air quality pollution from dairy farms).
Barros, T., J. M. Powell, M. A. C. Danes, M. J. Aguerre and M. A. Wattiaux. 2017. Short communication: Relative partitioning of N from alfalfa silage, corn silage, corn grain and soybean meal into milk, urine, and feces, using stable 15N isotope. (Accepted).
Barros, T., M. Quaassdorff, M. J. Aguerre, J. J. Olmos Colmenero, S. Bertics, and M. A. Wattiaux. 2017. Effects of dietary crude protein concentration on late-lactation dairy cow performance and indicators of nitrogen utilization. Journal of Dairy Science. (Accepted).
Powell, J. M., T. Barros , M. Danes, M. J. Aguerre, M. A. Wattiaux, K. Reed. 2017. Nitrogen use efficiencies to grow, feed, and recycle manure from the major diet components fed to dairy cows in the USA. Agriculture, Ecosystems & Environment. 239: 274-28.
Duval, B. D., M. Aguerre, M. Wattiaux, P. A. Vadas, J. M. Powell. 2016. Potential for reducing on-farm greenhouse gas and ammonia emissions from dairy cows with prolonged dietary tannin additions. Water, Air, & Soil Pollution
Aguerre, M. J., M. C. Cappozolo, P. Lencioni, C. Cabral, and M. A. Wattiaux. 2016. Effect of quebracho-chestnut tannin extracts at two dietary crude protein levels on performance, rumen fermentation and nitrogen partitioning in dairy cows. Journal of Dairy Science 99:4476-4486.
Arndt, C., J. M. Powell, M. J. Aguerre, P. M. Crump, and M. A. Wattiaux. 2015. Feed conversion efficiency in dairy cows: Repeatability, variation in digestion and metabolism of energy and nitrogen, and ruminal methanogens. Journal of Dairy Science Vol. 98:3938-3950.
Arndt, C., J. M. Powell, M. J. Aguerre, M. A. Wattiaux. 2014. Performance, digestion, nitrogen balance, and emission of manure ammonia, enteric methane, and carbon dioxide in lactating cows fed diets with varying alfalfa silage-to-corn silage ratios. Journal of Dairy Science Vol. 98:418-430.
Aguerre, M. J., M. A. Wattiaux, and J. M. Powell. 2012. Emission of ammonia, nitrous oxide, methane, and carbon dioxide during storage of dairy cow manure as affected by dietary forage to concentrate ratio and crust formation. Journal of Dairy Science Vol. 95:7409-7416.
Aguerre, M. J., M.A. Wattiaux, T. Hunt and N. E. Lobos. 2012. Effect of nitrogen content and additional straw on changes in chemical composition, volatile losses, and ammonia emission from dairy manure during long-term storage. Journal of Dairy Science 95:3454-3466.
Powell, J. M., M. J. Aguerre and M. A. Wattiaux. 2011. Tannin extracts abate ammonia emissions from simulated dairy barn floors. Journal of Environmental Quality 40:907-914.
Powell, J. M., M. J. Aguerre and M. A. Wattiaux. 2011. Dietary crude protein and tannin impact dairy manure chemistry and ammonia emissions from incubated soils. Journal of Environmental Quality 40:1767-1774.
Aguerre, M. J., M. A. Wattiaux, J. M. Powell, G. A. Broderick, and C. Arndt. 2011. Effect of forage to concentrate ratio in dairy cow diets on emission of methane, carbon dioxide and ammonia, lactation performance and manure excretion. Journal of Dairy Science 94:3081-3093.
Aguerre M. J., M.A. Wattiaux, T. Hunt and B.R. Larget. 2010. Effect of dietary crude protein on ammonia-N emission measured by herd nitrogen mass balance in a free-stall dairy barn managed under farm-like conditions. Animal 4:1390-1400.
Rastani, R. R., N. E. Lobos, M. J. Aguerre. R. R. Grummer, M. A. Wattiaux. 2006. Relationships between blood urea nitrogen and energy balance or measures of tissue mobilization in Holstein cows during the periparturient period. The Professional Animal Scientist 22:382-385.