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
 Plant Science Research: St. Paul, MN
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area St. Paul, Minnesota Plant Science 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
                                            Lamb, Joannitem
                                            Jung, Hans Joachimitem
                                            SHEAFFER, CRAIG - UNIVERSITY OF MINNESOTAitem
                                            Samac, Deborah

                                                         - *Debby*
  Submitted to: North American Alfalfa Improvement Conference
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 7/17/2006
                                    Publication  Date: 7/17/2006
                                    Citation: Lamb, J.F., Jung, H.G., Sheaffer, C.C., Samac, D.A. 2006. Alfalfa leaf protein and stem cell wall polysaccharide yields and theoretical ethanol production under hay and biomass management systems [abstract]. 40th North American Alfalfa Improvement Conference, July 17-19, 2006, Bloomington, Minnesota. Available: http://www.naaic.org/Meetings/National/2006meeting/procedings/Lamb.PDF.Interpretive Summary:
                                Technical Abstract: Alfalfa (Medicago sativa L.) has been proposed as a biofuel feedstock, where the stems would be processed to produce ethanol and the leaves sold separately as a livestock feed. We propose a different management regime reducing population density, delaying harvest, and cutting less frequently per growing season to maximize leaf and stem yield be implemented for biomass production. Our objectives were to evaluate the effects and interactions of environment, biomass management strategy compared to traditional hay production practices on leaf crude protein (CP) and stem carbohydrate concentrations and yields of alfalfa germplasms differing in fall dormancy and genetic origin. Four alfalfa germplasms, two hay-type alfalfas adapted to the Upper Midwest region of the U.S., and two biomass-type alfalfas of Flemish or southern European origin were established at 450 plants m-2 and harvested at early bud (hay management system) and at 180 plants m-2 and harvested at green pod (biomass management system) in three environments. The biomass-type alfalfas under the biomass management treatment had lower leaf CP, higher stem cell wall polysaccharide, higher stem lignin concentrations, comparable leaf CP yield, and higher stem cell wall polysaccharide yields compared to the hay-type alfalfas under the hay management. No germplasm differences were found for lignin concentration under either management system. On average all alfalfa germplasms had a 63% increase in total stem cell wall polysaccharide yield under the biomass management system compared to the hay management system. The impact of altered stem cell wall composition and increased stem DM yield of a biomass-type alfalfa under biomass system compared to a hay-type alfalfa under hay system increased the theoretical potential ethanol yield by 99%. Reduced harvesting costs and potentially longer stand life under the less frequent harvesting biomass management system would contribute additional economic efficiencies.


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