Feed additive reduces enteric methane emissions in dairy cows

Research in the Journal of Dairy Science® studies dose-response effect of methane inhibitor in dairy cows

Philadelphia, June 24, 2020

The enteric methane mitigation potential of 3-nitrooxypropanol (3-NOP) has been confirmed in previous studies. 3-NOP is highly soluble and rapidly metabolized in the rumen. Previous studies have shown a persistent methane mitigation effect when 3-NOP is administered through the total mixed ration (TMR). In a recent article appearing in the Journal of Dairy Science, scientists from six universities studied the methane mitigation effects of varying doses of 3-NOP in the feed of 49 multiparous Holstein cows at The Pennsylvania State University’s Dairy Teaching and Research Center.

After a 14-day adjustment period, cows received the base TMR mixed with a placebo or one of six treatment doses of 3-NOP ranging from 40 to 200 mg of 3-NOP/kg of feed. Dose levels were chosen based on previous research at this laboratory as well as studies conducted in beef cattle. The scientists hypothesized that within the range of application rates studied, 3-NOP would decrease enteric methane emissions without affecting dry matter intake or lactational performance of the cows.

The inclusion of 3-NOP in the TMR quadratically decreased daily enteric methane emissions by 22 to 40 percent in lactating dairy cows, with an average reduction of 31 percent. In this experiment, 3-NOP had no effect on dry matter intake or milk yield but linearly increased milk fat concentration and yield.

“We can determine by calculation that the decrease in daily enteric methane emissions would have increased the availability of feed digestible energy,” said lead investigator Alexander Hristov, PhD, Department of Animal Science, The Pennsylvania State University, University Park, PA, USA. “The reduction in emitted methane with 3-NOP would represent, in theory, additional energy for lactation that could potentially be used for productive purposes.”

The results of this study suggest that 3-NOP is a promising feed additive for reducing enteric methane emissions, while maintaining lactational performance in dairy cows and potentially increasing milk fat yield.


Notes for editors
The article is “Dose-response effect of 3-nitrooxypropanol on enteric methane emissions in dairy cows,” by A. Melgar, K.C. Welter, K. Nedelkov, C.M.M.R. Martins, M.T. Harper, J. Oh, S.E. Räisänen, X. Chen, S.F. Cueva, S. Duval, and A.N. Hristov (https://doi.org/10.3168/jds.2019-17840). It appears in the Journal of Dairy Science, volume 103, issue 7 (July 2020), published by FASS Inc. and Elsevier.

Full text of the article is available to credentialed journalists upon request. Contact Eileen Leahy at +1 732 238 3628 or jdsmedia@elsevier.com to obtain copies. Journalists wishing to interview the authors should contact the corresponding author at anh13@psu.edu.

About the Journal of Dairy Science
The Journal of Dairy Science® (JDS), an official journal of the American Dairy Science Association®, is co-published by Elsevier and FASS Inc. for the American Dairy Science Association. It is the leading general dairy research journal in the world. JDS readers represent education, industry, and government agencies in more than 70 countries, with interests in biochemistry, breeding, economics, engineering, environment, food science, genetics, microbiology, nutrition, pathology, physiology, processing, public health, quality assurance, and sanitation. JDS has a 5-year Impact Factor of 3.208 according to the 2018 Journal Citation Reports®, published by Clarivate Analytics (2019). www.journalofdairyscience.org

About the American Dairy Science Association
The American Dairy Science Association (ADSA) is an international organization of educators, scientists, and industry representatives who are committed to advancing the dairy industry and keenly aware of the vital role the dairy sciences play in fulfilling the economic, nutritive, and health requirements of the world's population. It provides leadership in scientific and technical support to sustain and grow the global dairy industry through generation, dissemination, and exchange of information and services. Together, ADSA members have discovered new methods and technologies that have revolutionized the dairy industry. www.adsa.org

About Elsevier
Elsevier is a global information analytics business that helps scientists and clinicians to find new answers, reshape human knowledge, and tackle the most urgent human crises. For 140 years, we have partnered with the research world to curate and verify scientific knowledge. Today, we’re committed to bringing that rigor to a new generation of platforms. Elsevier provides digital solutions and tools in the areas of strategic research management, R&D performance, clinical decision support, and professional education; including ScienceDirect, Scopus, SciVal, ClinicalKey and Sherpath. Elsevier publishes over 2,500 digitized journals, including The Lancet and Cell, 39,000 e-book titles and many iconic reference works, including Gray's Anatomy. Elsevier is part of RELX, a global provider of information-based analytics and decision tools for professional and business customers. www.elsevier.com

Media contacts
Eileen Leahy
+1 732 238 3628

Ken Olson, PhD, PAS
American Dairy Science Association®
+1 630 237 4961