Luiz F. Ferraretto

Assistant Professor & Extension Specialist - Ruminant Nutrition

60% Extension, 40% Research



Office Location

1675 Observatory Dr
934F Animal Sciences
Madison, WI 53706

Luiz Ferraretto is originally from Brazil where he earned his B.S. in Animal Science from São Paulo State University in 2008. Immediately after the completion of his B.S. Degree, Luiz joined the University of Wisconsin-Madison for an internship (2009) followed by an M.S. (2011) and Ph.D. (2015) in dairy science with a focus on applied dairy nutrition and forage quality. After the completion of his Ph.D., Luiz joined The William H. Miner Agricultural Research Institute as a Post-doctoral Research Associate. From 2016 to 2020, Luiz was an Assistant Professor of Livestock Nutrition at the University of Florida. Luiz joined UW-Madison in May of 2020. 

His research and extension interests are applied ruminant nutrition and management. His program is focused on understanding and improving starch and fiber utilization by dairy cows, corn silage and high-moisture corn quality and digestibility, the use of alternative by-products as feed ingredients, supplementation of feed additives to lactating cows, and the development of on-farm and laboratory techniques for forage and feed analysis. 

Selected Peer-Reviewed Articles

Saylor, B. A., C. Heinzen Jr., E. C. Diepersloot, and L. F. Ferraretto. 2022. Effect of microbial inoculation and storage length on fermentation profile and nutrient composition of high-moisture maize ensiled at two different dry matter concentrations. J. Anim. Sci. skac254

Pech-Cervantes, A. A., L. F. Ferraretto, and I. M. Ogunade. 2022. Meta-analysis of the effect of the dietary application of exogenous alpha-amylase preparations on performance, nutrient digestibility, and rumen fermentation of lactating dairy cows. J. Anim. Sci. skac189

Diepersloot, E. C., M. R. Pupo, L. G. Ghizzi, C. Heinzen Jr., and L. F. Ferraretto. 2022. Effect of wilting and microbial inoculation on the fermentation profile, nutrient composition, and aerobic stability of Bermudagrass silage. Anim. Feed Sci. Technol. 290:115376.

Pupo, M. R., M. O. Wallau, and L. F. Ferraretto. 2022. Effects of season, variety-type, and trait on dry matter yield, nutrient composition, and predicted intake and milk yield of whole-plant sorghum forage. J. Dairy Sci. 105:5776-5785.

Ravelo, A. D., D. Vyas, L. F. Ferraretto, and A. P. Faciola. 2022. Effect of sucrose and lactose as a partial replacement to corn in lactating dairy cow diets. A review. Transl. Anim, Sci. 6:txac044. (5)

Diepersloot, E. C., C. Heinzen Jr., B. A. Saylor, and L. F. Ferraretto. 2022. Effect of cutting height, microbial inoculation, and storage length on fermentation profile and nutrient composition of whole-plant maize silage. Transl. Anim. Sci. 6:txac037.

Heinzen Jr, C., M. C. N. Agarussi, E. C. Diepersloot, and L. F. Ferraretto. 2022. Effects of microbial inoculation on dry matter losses, fermentation profile, and aerobic stability of wet brewers grain stored with increasing concentrations of dry ground corn. Anim. Feed Sci. Technol. 286:115257.

Ghizzi, L. G., M. R. Pupo, C. Heinzen Jr., T. A. Del Valle, F. P. Rennó, and L. F. Ferraretto. 2022. Short communication: Effect of molasses addition at ensiling on ruminal in situ dry matter and ruminal degradation of whole-plant soybean silage harvested at different phenological stages. Agricultural Sciences 13:268-281.

Amaro, F. X., D. Kim, R. Restelatto, P. Carvalho, K. G. Arriola, E. J. C. Duvalsaint, A. P. Cervantes, Y. Jiang, M. C. N. Agarussi, V. P. Silva, A. T. Adesogan, L. F. Ferraretto, C. R. Staples, J.-S. Eun, J. S. Park, J. O. Moon, and D. Vyas. 2022. Lactational performance of dairy cows in response to supplementing N-acetyl-L-methionine as a source of rumen-protected methionine. J. Dairy Sci. 105:2301-2314.

Ravelo, A., B. C. Agustinho, J. Arce-Cordero, H. F. Monteiro, S. L. Bennet, E., Sarmikasoglu, J. Viniyard, E. R. Q. Vieira, R. R. Lobo, L. F. Ferraretto, D. Vyas, and

A. P. Faciola. 2022. Effects of partially replacing dietary corn with molasses, condensed whey permeate, or treated condensed whey permeate on ruminal microbial fermentation. J. Dairy Sci. 105:2215-2227.

Agustinho, B. C., J. L. P. Daniel, L. M. Zeoula, L. F. Ferraretto, H. F. Monteiro, M. R. Pupo, L. G. Ghizzi, M. C. N. Agarussi, C. Heinzen Jr, R. R. Lobo, A. D. Ravelo, and A. P. Faciola. 2021. Effects of lignocellulolytic enzymes on the fermentation profile, chemical composition, and in situ ruminal disappearance of whole-plant corn silage. J. Anim. Sci. skab295.

Karami, A., M. Alikhani, M. Khorvash, F. Hashemzadeh, A, Sdeghi-Sefidmazgi, H. Rafiee, and L. F. Ferraretto. 2021. Effects of different forage to concentrate ratios on performance, plasma metabolites, structural growth, and feeding behavior of weaned dairy calves from 70 to 120 d of age. Italian J. Anim. Sci. 20:1317-1327.

Arriola, K. G., D. Vyas, D. Kim, M. C. N. Agarussi, V. P. Silva, M. Flores, Y. Jiang, X. Yanlin, A. A. Pech-Cervantes, L. F. Ferraretto, and A. T. Adesogan. 2021. Effect of Lactobacillus hilgardii, Lactobacillus buchneri or their combination on the fermentation and nutritive value of sorghum silage and corn silage. J. Dairy Sci. 104:9964-9675.

Saylor, B. A., C. L. McCary, E. C. Diepersloot, C. Heinzen Jr, M. R. Pupo, J. O. Gusmão, L. G. Ghizzi, H. Sultana, and L. F. Ferraretto. 2021. Effect of process roll gap width and storage length on fermentation profile, nutrient composition, kernel processing score, and starch disappearance of whole-plant maize silage harvested at three different maturities. Agriculture. 11:574.

Saylor, B. A., E. C. Diepersloot, C. Heinzen Jr., C. L. McCary, and L. F. Ferraretto. 2021. Effect of kernel breakage on the fermentation profile, nitrogen fractions, an in vitro starch digestibility of whole-plant corn silage and ensiled corn grain. J. Dairy Sci. Comm. 2:191-195.

Selected Book Chapters

Ferraretto, L., and R. Shaver. 2022. Chapter 4: Feeding. In: Corn silage: from seed to feed. W. D. Hoard & Sons Company. Fort Atkinson, WI.

Selected Conference Proceedings

Ferraretto, L. F. 2021. Dietary fiber and starch for dairy cows: new perspectives from the Nutrient Requirements of Dairy Cattle study report. Proc. VIII SIMLEITE. Pages 49-60.

Saylor, B., and L. Ferraretto. 2021. Factors affecting the nutritive value and fermentation of high-moisture corn. Proceedings of SIPEL – Simpósio Internacional da Pecuária Leiteira. Pages 26-41.

Ferraretto, L. 2021. Fiber and starch digestibility in corn silage. In: Proc. of California Animal Nutrition Conference. Sacramento, CA. Pages 88-94.

Ferraretto, L. F. 2021. Feeding corn silage to dairy cows. In: Proc. 82nd Minnesota Nutrition Conference and ADM Pre-Conference. Mankato, MN.

Ferraretto, L. 2020. Production and utilization of sorghum silage in dairy herds. Proc. Ifina – Nutrile – Actualizacion anual en nutricion de bovinos de leche. Argentina.

Ferraretto, L. F., A. T. Adesogan, K. G. Arriola, E. M. Paula, and D. Vyas. 2019. Strategies to improve fiber digestibility of whole-plant corn silage. Proc. I Simpósio Internacional de Nutrição de Gado de Leite. Uberlandia, MG, Brazil. Pages 47-55.

Ferraretto, L. F. 2019. Length of silage storage: What does it change? Proc. IX Simfor. Viçosa, MG, Brazil. Pages 171-182.

Ferraretto, L. F. 2019. New perspectives on fiber and starch digestibility of corn silage. Proc. Four-State Dairy Nutr. & Mgmt. Conf. Dubuque, IA. Pages 164-169.

Ferraretto, L. F. 2019. Optimizing the role of starch as an energy source for dairy cows. In: Proc. 28th Tri-State Dairy Nutrition Conference, Fort Wayne, IN. Pages 17-26.

Ferraretto, L. F., E. M. Paula, C. S. Ballard, C. J. Sniffen, and I. Shinzato. 2018. Impact of essential amino acid balancing postpartum on lactation performance by dairy cows. In: Proc. 29th Florida Ruminant Nutrition Symposium, Gainesville, FL. Pages 1-12.

Selected Popular Press Articles

Ferraretto, L., and C. Diepersloot. 2022. Preparing for the 2022 corn harvest. Wisconsin State Farmer August 23rd, 2022.

Ferraretto, L. 2022. Pick an effective inoculant for your silage. Hoard’s Dairyman, May 10th 2022 issue.

Ferraretto, L. 2022. Getting the most out of your high-moisture corn. Feedstuffs. April 2022 issue. Page 11.

Ferraretto, L. 2022. Lignin locks down cow performance. Hoard’s Dairyman, April 10th, 2022 issue.

Ferraretto, L. 2021. The challenges and rewards of feeding byproducts. Wisconsin State Farmer December 19th, 2021.

Ferraretto, L. 2021. Analyze feeds before feeding byproducts. PDPW’s Dairy Bottom Line December, 2021 issue.

Ferraretto, L. 2021. Make sorghum silage the best it can be. Hay and Forage Grower, November 16th, 2020 issue. Pages 20-21.

Ferraretto, L. 2021. Maximize the 2021 corn harvest. PDPW’s Dairy Bottom Line, August, 2021 issue.

Ferraretto, L. 2021. Harvest corn silage at right time. Wisconsin Agriculturist, Dairy Program Column, August 1st, 2021 issue.

Ferraretto, L. 2020. Providing a good meal to dairy cows is more than diet formulation. Wisconsin State Farmer, December 7th, 2020.

Ferraretto, L. 2020. Does fermentation change corn silage processing score? Vita Plus Forage Foundation Newsletter, December 16th, 2020 issue.

Ferraretto, L. 2020. Feeding to maximize protein yield. PDPW’s Dairy Bottom Line, December, 2020 issue.–_december_2020

Ferraretto, L. 2020. Leave it in the silo – here’s why. Hay and Forage Grower, November 16th, 2020 issue. Pages 10-11.–%E2%80%94-here%E2%80%99s-why.html

Ferraretto, L. 2020. Mind 2020 forage conditions. PDPW’s Dairy Bottom Line, October 1st, 2020 issue.–_october_2020

Ferraretto, L. 2020. Inoculating earlage. Vita Plus Forage Foundation Newsletter, August 17th, 2020 issue.

Selected Videos

Maximizing nutrient digestibility of corn silage –

Feeding the 2020 corn silage crop –

Silage Quality – From pricing to feeding behavior –

Journal of Dairy Science Editorial Board, 2022 to present

CALS Research Advisory Committee, member, 2021 to present

Department of Animal and Dairy Sciences Herd Use Committee, member, 2021 to present

Department of Animal and Dairy Sciences Extension and Outreach Committee, member, 2020 to present

CALS Ag Research Stations Committee, member, 2020 to present

Associate Editor, Brazilian Journal of Animal Sciences, 2018 to present

Reviewer, several journals related to agriculture and animal science

2021 – Lallemand Forward Award for Scientific Excellence in Dairy Nutrition, American Dairy Science Association

2020 – Journal of Dairy Science Top 100 for 2020 – JDS 101:4111-4121.

2018 – The Professional Animal Scientist Editor’s Choice Article – PAS 34:293-298

2016 – National Milk Producers Federation Richard M. Hoyt Award, American Dairy Science Association

2015 – Journal of Dairy Science Editor’s Choice Article – JDS 98:2662-2675

2015 – Journal of Dairy Science Top 100 – JDS 98:2662-2675

2015 – Dairy Young Scholar Award, Midwest Section of American Dairy Science Association

2012 – 3rd Place, Graduate Student Poster Contest (MS Division), American Dairy Science Association