U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Agroecosystem Management Research: Lincoln, NE
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Lincoln, Nebraska Agroecosystem Management Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Jin, Virginiaitem
                                            Baker, Johnitem
                                            Johnson, Janeitem
                                            Karlen, Douglasitem
                                            Lehman, R

                                                         - *Michael*item
                                            Osborne, Shannonitem
                                            Sauer, Thomasitem
                                            Stott, Dianeitem
                                            Varvel, Garyitem
                                            Venterea, Rodney

                                                         - *Rod*
  Submitted to: Sungrant Initiative
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 10/2/2012
                                    Publication  Date: 11/19/2012
                                    Citation: Jin, V.L., Baker, J.M., Johnson, J.M., Karlen, D.L., Lehman, R.M., Osborne, S.L., Sauer, T.J., Stott, D.E., Varvel, G.E., Venterea, R.T. 2012. Greenhouse gas fluxes in response to corn stover harvest. In: Proceedings of the Sun Grant National Conference. Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, Louisiana. Available: http://sungrant.tennessee.edu//NatConference/ConferenceProceedings/.Interpretive Summary: Corn stover is an important livestock feed and will probably be a major source of renewable bioenergy, especially in the U.S. Corn Belt.  Overly aggressive removal of stover, however, could lead to greater soil erosion and hurt producer yields in the long-run.  Good residue management practices could help prevent erosion of valuable topsoil while still providing a revenue source for producers, either as livestock feed or for use in renewable bioenergy.  Good residue management could also help control the loss of greenhouse gases from agricultural soils that could add to already increasing levels of atmospheric greenhouse gases contributing to global climate change.  To date, there is no regional study on how residue management affects gas emissions from agricultural soils.  This study presents preliminary results from nine sites across the U.S. Corn Belt.  We found that maximum rates of residue removal decreased soil gas emissions compared to when no residue was removed. The decision of how much residue to remove, however, will depend on local conditions and other agronomic management practices (ex. irrigation, tillage).
                                Technical Abstract: Agricultural soils play a critical role in the mitigation of increasing levels of atmospheric greenhouse gases (GHGs) such as carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4).  Identifying management strategies (fertilization, tillage, irrigation) that optimize corn stover removal rates for livestock feed and for cellulosic bioenergy is key to enhancing the long-term sustainability of yield and biomass, increasing soil carbon storage, minimizing erosion, and reducing agricultural GHG emissions.  In-field measurements of management effects on GHG emissions provide critical data for quantifying the net energy efficiency and economic feasibility of bioenergy production systems.  This assessment reviews GHG fluxes in corn stover removal systems under different management regimes for nine corn stover team sites in the SunGrant Regional Partnership and the USDA-ARS’s Renewable Energy Assessment Project (REAP).  Cumulative GHG emissions varied widely across locations, by management, and from year-to-year.  Despite this high variability, maximum stover removal averaged across all sites, years, and management resulted in lower total emissions of CO2 (-12 ± 11%) and N2O (-13 ± 28%) compared to no stover removal.  Decreases in total CO2 and N2O emissions in stover removal treatments were attributed to decreased availability of stover-derived C and N inputs into soils, as well as possible microclimatic differences.  Soils at all sites were CH4 neutral or small CH4 sinks.  Exceptions to these trends occurred for all GHGs, highlighting the importance of site-specific management and environmental conditions on GHG fluxes in agricultural soils.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov