**-  North Atlantic  
-  University Park, Pennsylvania 
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**Location: University Park, Pennsylvania**
												Project Number: 1902-21000-007-00Project Type:Appropriated

Start Date: Dec 17, 2007End Date: Dec 16, 2012

**Objective:**1.A. Develop tools to facilitate the selection of species mixtures for pastures, the distribution of pasture types across a farm, and the assessment and monitoring of pastures at multiple scales to improve forage/grassland system function and reduce production risks.1.B. Identify new grazing management and supplementation strategies that complement grazing preferences of dairy cattle to optimize the utilization of mixed-species cool-season pastures of the Northeast U.S. and to reduce inputs costs for pasture-based producers.2.A. Identify management systems that minimize net greenhouse emissions in forage, grassland, and energy crop systems in humid-temperate climates.2.B. Determine optimal management and environmental benefits of perennial and annual bioenergy cropping systems in the Northeast U.S. to reduce production costs and increase yields.  
**Approach:**1.A. A trait-based index will be developed to relate pasture plant community composition (both species presence and abundance) to ecosystem function in grasslands. A multi-site field-plot trial will be conducted to test the hypothesis that mixed plant communities with greater species evenness produce more herbage and are more resistant to weed invasion than mixtures with lower evenness or monocultures. Science-based decision support tools will be developed for forage species selection within pastures and across farms to meet producer goals for ecosystem functions given the climate, landscape and soils.1.B. Observational research will be conducted on pasture-based dairy farms feeding a range of supplementation strategies with varying pasture composition to characterize the effects of supplementation on grazing behavior and diet selection. Ingestive behavior will be quantified on during spring, summer, and fall grazing. Detailed feeding and milk production information will be collected from farm records and personal interviews. Continuous culture fermenters will be used to identify ruminal fermentation products that influence grazing patterns via post-ingestive feedback mechanisms. Sward-box studies will be used to evaluate cattle grazing behavior responses to monocultures and mixtures of selected grasses and legumes.2A. Multi-location field plot and farm-scale trials will be conducted to determine the greenhouse gas emissions and economics of perennial and annual crops grown for bioenergy. Differences in C isotope discrimination (d13C) of C3 and C4 species will be exploited to partition respiration between new C respired from C3 plants such as orchardgrass and white clover and old C respired from the active pool of soil organic matter that has formed under the C4 species, big bluestem.2B. Biomass yield, feedstock quality, and greenhouse gas emissions of current annual and proposed perennial bioenergy crops under the same climate and soil will be measured, and the resulting data will be used to validate the DAYCENT biogeochemical model at a site in the northeastern U.S.
    Project TeamSKINNER, ROBERT  - *HOWARD*SODER, KATHY GOSLEE, SARAH ADLER, PAUL  
Project Annual Reports FY 2011 FY 2010 FY 2009 FY 2008 Publications  Publications 
Related National Programs Food Animal Production(101) Bioenergy(213) Pasture, Forage and Rangeland Systems(215) Related Projects  Pastureland Conservation Effects Assessment Project Literature Syntheseis  Conservation Practices in Northeastern Grazing Lands  Regional Biomass Feedstock Partnership  Development and Evaluation of New Bioenergy Cropping System Strategies for the Northeastern U.S.  U.S. Native Grass Breeding Consortium to Identify Regional Optimum Biomass Productivity on Marginal Land  Mechanistic Modeling of Multispecies Pasture Growth and Management  Integrated Crop and Livestock System Project  Integrated Pasture-Crop Rotation  Grazingland Conservation Assessment  Greenhouse Gas Emissions and Nitrate Losses from Organic Soils in Dairy Farming Systems in Northern Germany  Regional Distribution and Abundance of Biofuel and Forage Species  Impact of Conservation Practices on Nutrient Transport and Fate in Pasture Systems  Northeast Pasture Consortium: Partnership to Identify, Develop, Coordinate, and Promote Pasture Research and Extension  Regional Corn Stover Removal Impact Study - Ames (Ii)  Assisting Organic Dairy Producers to Meet the Demands of New and Emerging Milk Markets  							Last Modified: 04/24/2012 		ARS Home |USDA.gov |Site Map |Policies and Links FOIA |Accessibility Statement |Privacy Policy |Nondiscrimination Statement |Information Quality |USA.gov |White House

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