Blank Back Page International Symposium on Soil Organic Matter Dynamics: Land Use, Management and Global Change July 6‐9, 2009 Cheyenne Mountain Conference Center Colorado Springs, Colorado, USA Organizing Committee Keith Paustian – Colorado State University (Chair) M. Francesca Cotrufo – Colorado State University (Vice‐Chair) Richard Conant – Colorado State University Ronald Follett – USDA/Agricultural Research Service, Fort Collins Eugene Kelly – Colorado State University Maurice Mausbach – USDA/Natural Resource Conservation Service (retired) Stephen Ogle – Colorado State University Eldor Paul – Colorado State University Gary Peterson – Colorado State University Michael Ryan – US Forest Service, Fort Collins Scientific Committee Olof Andrén – Swedish University of Agricultural Sciences, Sweden Carlos E.P. Cerri – University of Sao Paolo, Brazil Abad Chabbi – INRA‐UEFE, France Jorge Etchevers – Colegio de Postgraduados, Mexico Paul Fixen – International Plant Nutrition Institute Jürg Fuhrer – ART, Zurich, Switzerland Peter Grace – Queensland University of Technology, Australia Georg Guggenberger – Leibniz Universität Hannover, Germany Henry Janzen – Agriculture and Agrifood Canada Miko Kirschbaum – Landcare Research, New Zealand Rattan Lal – Ohio State University, USA Johannes Lehmann – Cornell University, USA Roel Merckx – Belgium Genxing Pan – Nanjing University, China Phil Sollins – Oregon State University, USA Conference Sponsors 25×’25 Carbon Management Center, Colorado Clean Energy Collaboratory Chicago Climate Exchange College of Agricultural Sciences, Colorado State University International Plant Nutrition Institute USDA/Agricultural Research Service USDA/Cooperative State Research, Education and Extension Service USDA/Natural Resource Conservation Service US Department of Energy – Office of Science Warner College of Natural Resources, Colorado State University Conference Program MONDAY, JULY 6: 8.00‐5:00 pm Registration 8.30‐3.30 Field trips 5.00‐5.10 Keith Paustian, Conference Chair 5.10‐5.20 Abad Chabbi, Past SOM Conference Chair 5.20‐5.50 Gary Peterson, Past President, Soil Science Society of America 5.50‐ 6.40 Keynote: Eldor Paul “Soil organic matter dynamics: Looking to 2030 on the basis of 200 years of research.” 7.00‐10.00 Dinner (BBQ) & entertainment TUESDAY, JULY 7: Plenary session: Climate and SOM dynamics Colorado Room: Chairs – Peter Grace & Mike Ryan 8.00‐8.40: Keynote, Eric Davidson: “A conceptual framework explaining the ubiquitous temperature dependence of decomposition of soil organic matter and apparent exceptions to the rule.” 8.40‐8.55: R. Conant: “Synthesis of recent studies investigating the relationship between soil OM lability and decomposition temperature sensitivity.” 8.55‐9.10: M. Wetterstedt: “Temperature sensitivity and substrate quality in needle litter decomposition.” 9.10‐9.25: D. Hopkins: “Soil organic carbon stocks and dynamics in long‐term experimental grassland plots.” 9.25‐9.40: J. Gillabel: “Protection of SOM determines the temperature sensitivity of SOM decomposition.” (presented by R. Merckx). 1 9.40‐9.55: M. J. Steinweg: “Indirect evidence for reduced enzyme turnover under experimental drought at the Boston Area Climate Experiment” Coffee Break 10.15‐10.45: Invited, Miko Kirschbaum: “Climate change and SOM dynamics ‐ Direct and indirect effects” 10.45‐11.00: M. Hoosbeek: “Effect of free atmospheric CO2 enrichment (FACE) on symbiotic N2‐fixation and soil carbon content and stabilization in a mixed deciduous stand in Wales, UK” 11.00‐11.15: P. Barré: “Stable carbon in soils: insights from six long term bare fallow experiments” 11.15‐11.30: C. Rasmussen: “Geologic control of soil carbon response to climate change: A dynamic interaction of soil minerals, temperature, and litter type” 11.30‐11.45: B. Foereid: “Modelling changes in organic carbon in the soils of England and Wales” 11.45‐12.00: General Discussion 12.00‐1.30: Lunch Break Parallel Session 1: Nitrogen and SOM dynamics Colorado Room: Chairs – Paul Fixen & Ron Follett 1.30‐2.10: Keynote, Don Zak: “Microbial responses to anthropogenic n deposition: Implications for the future functioning of terrestrial ecosystems” 2.10‐2.25: S. Frey: “Soil organic matter responses to chronic nitrogen additions in a temperate forest” 2.25‐2.40 M. Bradford: “Is rhizodeposited‐carbon an important precursor for SOC? Exploring this question in the context of nitrogen and phosphorus fertilization experiments” 2.40‐2.55 E. Arellano: “Short‐term Effects of Biosolids Application on Nitrogen and Carbon pools in a Loblolly Pine (Pinus taeda L.) Plantation” Coffee break 2 3.15‐3.45: Invited, John Grove: “Fertilizer N and SOC in managed landscapes: Coupled, confounded and confused” 3.45‐4.00: S. Zingore: “Influence of farmer management practices on soil organic carbon dynamics and maize productivity in smallholder farming systems in NE Zimbabwe” 4.00‐4.15: M. Dodd: “Soil carbon and nitrogen changes over 20 years on New Zealand hill‐ country pastures receiving different phosphorus inputs” 4.15‐4.30: P. Eliasson: “Carbon cost of nitrogen mineralisation in a dynamic forest ecosystem model” 4.30‐4.45: General Discussion Parallel Session 2: SOM dynamics in flooded, organic, alpine and high latitude soils White River Room: Chairs – Jürg Fuhrer & Maury Mausbach 1.30‐2.10: Keynote, Jens Leifeld: “Organic matter in soils of cold and wet ecosystems ‐ anything different?” 2.10‐2.25: I. P. Harley: “Plant‐soil interactions, positive priming effects and patterns of soil C storage in arctic Sweden” 2.25‐2.40 C. Stewart: “The influence of plant species on soil organic matter chemistry in Hawaiian soils” 2.40‐2.55: A. Koelbl: “Development of bulk density and of total C and N distribution during paddy soil evolution.” Coffee Break 3.15‐3.45: Invited, Genxing Pan: “Soil organic matter dynamics of rice paddies of China” 3.45‐4.00: R. Singaravel: “Role of organic matter in sustaining fertility and productivity of problem soils of coastal ecosystem.” 4.00‐4.15: L. S. Da Silva: “Methane emissions by flooded soils from Rio Grande do Sul State, Brazil.” 4.15‐4.30: General Discussion 3 Parallel Session 3: Biofuels, SOM and net GHG balance Cheyenne Room: Chairs – Stephen Ogle & Henry Janzen 1.30‐2.10: Keynote, Phil Robertson: "Flies in the biofuels ointment: The complementary roles of SOM and nitrous oxide" 2.10‐2.25 M. Dondini: “13C dynamics in soil aggregates across a soil profile under an established Miscanthus crop” 2.25‐2.40 H. Gollany: “Simulating soil organic matter dynamics and effects of residue removal using the CQESTR model” 2.40‐2.55 N. Amougou: “Management of Miscanthus giganteus: Impact on amount and quality of plant litters and their biodegradability in soil.” Coffee Break 3.15‐3.45 Invited, Bill Parton: “Impact of biofuel cropping systems on greenhouse gas fluxes” 3.45‐4.00 B. VandenBygaart: “Crop residue removal and fertilizer N: Effects on soil organic carbon on a long‐term crop rotation experiment in a Udic Boroll.” 4.00‐4.15 L. Ma: “Long‐Term Corn Stover Removal Effects on Soil Organic Carbon Dynamics as Simulated by RZWQM2” 4.15‐4.30 G. Velu: “Potential of cellulose‐producing actinomycetes from termite ecosystem in bioethanol production.” 4.30‐4.45: General Discussion 5.00‐7.00: Poster Session (Poster Session is open throughout the Symposium, however, authors are requested to be present 5‐7 PM) 7.00‐8.30: Dinner 8.30‐10.00: Informal workshop on global and national SOM networks White River Room 4 WEDNESDAY, JULY 8: Plenary session: SOM, soil disturbance and tillage Colorado Room: Chairs – Gary Peterson & Rich Conant 8.00‐8.40: Keynote, Roel Merckx: “Soil tillage and carbon sequestration – The elusive link” 8.40‐8.55: J. Álvaro‐Fuentes: “Current and future soil carbon sequestration in semiarid Mediterranean conditions: quantifying management and climate effects.” 8.55‐9.10: F. Matus: “Carbon content in subtropical and temperate soil physical fractions as indicators of organic matter saturation.” 9.10‐9.25: P. Gottschalk: “Simulation of soil organic carbon response at forest‐ cultivation sequences using 13C measurements.” 9.25‐9.40: C.H. Lee: “Effect of long‐term fertilization on soil organic carbon accumulation and microbial community structure in rice paddy soil.” 9.40‐9.55: G. Alberti: “Effects of land use change and reduced tillage on the greenhouse gases balance in an Italian agro‐ecosystem from Italian agricultural areas.” 9.55‐10.10: M. Spohn: “Impacts of land use on TOC, Chwe, carbohydrates, glomalin and water‐stable aggregates in Gleyic Podzols and Haplic Gleysols – Analysis of a 220‐year chronosequence.” Coffee Break 10.30‐11.00: Invited, D. Angers: “Tillage and soil organic C: digging deeper into the soil.” 11.00‐11.15: B. Sarapatka: “Organic matter in the soil of pasture land with various intensity of use.” 11.15‐11.30: I. Handayani: “Soil organic matter pool dynamics following field succession in Sumatra, Indonesia.” 11.30‐11.45: A. Swan: “Socioeconomic and environmental factors that influence adoption of no‐till in the Great Plains.” 11.45‐12.00: General Discussion 5 12.00‐1:30: Lunch Break Parallel Session 4: SOM and soil depth – controls on C and N balance Colorado Room: Chair –Abad Chabbi 1.30‐2.10: Keynote, Cornelia Rumpel: “SOM in deep soil horizons: what do we know about its participation in C and N cycles?” 2.10‐2.25: P. Baldrain: “Transformation of soil organic matter by fungi and their extracellular enzymes in forest soils is controlled by soil depth and fungal community composition.” 2.25‐2.40 E. R. Toosi: “Evaluation of some chemical and spectroscopic parameters during the biodegradation of soluble organic matter.” 2.40‐2.55 I. De Troyer: “Large effects of land management on dissolved organic matter in surface layers of agricultural soils are attenuated at larger soil depth.” 2.25‐3.10: M. Steffens: “Stabilisation of soil organic matter in complete soil profiles of semiarid steppe soils after grazing cessation.” Coffee Break 3.30‐4:00: Invited, Bernd Marschner: “Sensitivity of subsoil organic matter turnover to inputs of labile substrates.” 4.00‐4.15: J.