Measuring nitrous oxide emissions from a Wisconsin dairy forage cropping system

Animal Manure Management March 18, 2015 Print Friendly and PDF

Nitrous oxide emitted from cropland constitutes a significant component of the agricultural sector's overall greenhouse gas footprint. In order to accurately evaluate mitigation strategies, predict impacts, and model system behavior under future climate scenarios, it is essential to have access to flux measurements collected under regionally relevant conditions of soil, weather, and management strategies. As part of the Climate Change Mitigation and Adaptation in Dairy Production Systems of the Great Lakes Region USDA Coordinated Agricultural Project, we are measuring nitrous oxide flux from a typical dairy forage rotation in south-central Wisconsin. The rotation consists of one year of corn and three years of alfalfa, receiving liquid dairy manure fertilization in corn and alfalfa establishment years. Fluxes have been tracked over two growing seasons, and comparisons are possible between years as well as between phases of the rotation. Ultimately this data will be used to calibrate models for use in footprinting and benchmarking efforts and in predicting future productivity and resilience of dairy-based systems.

Author

Collier   Sarah     smcollier@wisc.edu        University of Wisconsin-Madison

The authors are solely responsible for the content of these proceedings. The technical information does not necessarily reflect the official position of the sponsoring agencies or institutions represented by planning committee members, and inclusion and distribution herein does not constitute an endorsement of views expressed by the same. Printed materials included herein are not refereed publications. Citations should appear as follows. EXAMPLE: Authors. 2015. Title of presentation. Waste to Worth: Spreading Science and Solutions. Seattle, WA. March 31-April 3, 2015. URL of this page. Accessed on: today’s date.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.