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
 Northwest Irrigation and Soils Research: Kimberly, ID
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                                    Software
                People

                    Staff Listing
                                    Careers


        


                    Publication Reprints
                    Other NWISRL Links
                        NWISRL Publications
                                    Imperfect SSR Finder
                                    Shiny App ServerSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Kimberly, Idaho Northwest Irrigation and Soils 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
- Searchable Publications
- Miscellaneous Publications
- Presentations
- Management Options for Control of Irrigation-Induced Erosion
- Upper Snake/Rock CEAP
- SWAGMAN-Whatif
- PIVNOZ-PIPELOSS
- Practical Production
- Irrigation Research
- PAM Research
- Sugarbeet Research

Title:   Author  item
                                            Lentz, Rodrickitem
                                            Ippolito, Jamesitem
                                            Spokas, Kurt
  Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 7/28/2014
                                    Publication  Date: 11/2/2014
                                    Citation: Lentz, R.D., Ippolito, J.A., Spokas, K.A. 2014. Biochar alters manure's effect on nitrogen cycling and greenhouse gas emissions in a calcareous soil. ASA-CSSA-SSSA Annual Meeting Abstracts. Long Beach, CA, Nov 2-5, 2014..Interpretive Summary:
                                Technical Abstract: Few multiyear field studies have examined the impacts of a one-time biochar application on net N mineralization and greenhouse gas emissions in an irrigated, calcareous soil; yet such applications are hypothesized as a means of sequestering atmospheric CO2 and improving soil quality.  We fall-applied four treatments, stockpiled dairy manure (42 Mg/ha dry wt.); hardwood-derived biochar (22.4 Mg/ha); combined biochar and manure; and no amendments (control).  Nitrogen fertilizer was applied in all plots and years based on treatment’s pre-season soil test N and crop requirements, and accounting for estimated N mineralized from added manure.  From 2009 to 2011 we measured greenhouse gas fluxes using vented chambers, net N mineralization (NNM) using buried bags, corn yield, and N uptake, and in a succeeding year, root and shoot biomass and biomass C and N concentrations.  Both amendments produced soil produced persistent soil effects.  Manure increased seasonal and three year cumulative NNM, root biomass, and root:shoot ratio 1.6-fold, CO2-C gas flux 1.2-fold, and reduced soil NH4:NO3 ratio 58% relative to no-manure treatments.   Relative to all other treatments on average, biochar-only produced 33% less cumulative NNM, 20% less CO2-C and 50% less N2O-N gas emissions, 35% less root biomass, and increased soil NH4:NO3 ratio 1.8-fold.   These long-term effects suggest that biochar slightly impaired nitrification and N immobilization processes, and are likely caused by enduring biochar porosity and surface chemistry characteristics that influence N-transform-ation processes, alter microbial populations, and sequester soil ammonium.  While the biochar-only treatment demonstrated a potential to increase corn yields and minimize CO2-C and N2O-N gas emissions in these calcareous soils; biochar also caused decreased corn yields under certain soil nutrient conditions.  Combining biochar with manure effectively utilizes these soil amendments as it eliminated potential yield reductions and maximized manure net N mineralization potential.


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