Cellulosic Biofuel Potential of a Winter Rye Double Crop across the U.S. Corn–Soybean Belt

Interest in renewable energy sources derived from plant biomass is increasing, raising concerns about fuel vs. food competition. One strategy to produce additional cellulosic biomass without reducing food-harvest potential is to grow winter cover crops after harvest of the primary summer crop. This study estimated biomass accumulation of a fall-planted winter rye (L.) double crop across the United States on corn (L.)–soybean [ (L.) Merr.] croplands. We identified corn and soybean areas by county using National Agricultural Statistics Service data, excluding irrigated land and areas already supporting a winter small-grain crop. Within this area, we calculated biomass production after corn harvest and before the subsequent corn or soybean crop for 30 locations using RyeGro, a cover-crop simulation model. Average RyeGro biomass yields for a 14-yr period were used to develop a regression model based on temperature and precipitation, which was used to determine rye biomass potential in each county. The spatial analysis indicated that 7.44 Mha in continuous corn and 31.7 Mha in a corn–soybean rotation are suitable for producing winter rye. The average RyeGro biomass yield for the 30 locations for six planting–harvest date scenarios is 4.2 Mg ha. The regression modeling results projected that 112 to 151 Tg (120–170 million U.S. tons) of rye biomass can be harvested from this land base 14 to 7 d, respectively, before spring crop planting. The study demonstrates the sizable potential for this strategy to produce cellulosic biofuel feedstock without redirecting the primary food crop to fuel.

[1]  F. Miguez,et al.  Review of Corn Yield Response under Winter Cover Cropping Systems Using Meta-Analytic Methods , 2005 .

[2]  Jeffrey G. Arnold,et al.  Model Evaluation Guidelines for Systematic Quantification of Accuracy in Watershed Simulations , 2007 .

[3]  P. Porter,et al.  Cover cropping to reduce nitrate loss through subsurface drainage in the northern U.S. corn belt. , 2004, Journal of environmental quality.

[4]  C. Cambardella,et al.  Enhancing Nutrient Cycling by Coupling Cover Crops with Manure Injection , 2008 .

[5]  S. Duiker,et al.  Rye Cover Crop Management for Corn Production in the Northern Mid‐Atlantic Region , 2005 .

[6]  V. Smil,et al.  Feeding the World: A Challenge for the Twenty-First Century , 2000 .

[7]  A. Clark Managing Cover Crops Profitably , 1905 .

[8]  D. Walters,et al.  Winter rye as a cover crop following soybean under conservation tillage , 1997 .

[9]  Jacinto F. Fabiosa,et al.  Use of U.S. Croplands for Biofuels Increases Greenhouse Gases Through Emissions from Land-Use Change , 2008, Science.

[10]  K. Thelen,et al.  Integrating a Double-Cropped Winter Annual Forage into a Corn-Soybean Rotation , 2002 .

[11]  S. Kuo,et al.  Long-term winter cover cropping effects on corn (Zea mays L.) production and soil nitrogen availability , 2000, Biology and Fertility of Soils.

[12]  D. Jaynes,et al.  Rye cover crop and gamagrass strip effects on NO3 concentration and load in tile drainage. , 2007, Journal of environmental quality.

[13]  G. Bollero,et al.  Soybean Yield as Affected by Biomass and Nitrogen Uptake of Cereal Rye in Winter Cover Crop Rotations , 2004 .

[14]  W. F. Wedin,et al.  Harvested Dry Matter from Single and Double‐Cropping Systems1 , 1981 .

[15]  N. M. Idaikkadar,et al.  CHAPTER 10 – Census of Agriculture , 1979 .

[16]  J. Baker,et al.  Evaluating the potential use of winter cover crops in corn–soybean systems for sustainable co-production of food and fuel , 2009 .

[17]  D. Walters,et al.  Winter rye cover crop following soybean under conservation tillage : Residual soil nitrate , 1999 .

[18]  H. Janzen,et al.  Energy balances of biodiesel production from soybean and canola in Canada , 2007 .

[19]  George H. Taylor,et al.  High-quality spatial climate data sets for the United States and beyond , 2000 .

[20]  Bruce N Wilson,et al.  Potential for a Rye Cover Crop to Reduce Nitrate Loss in Southwestern Minnesota , 2006 .

[21]  F. Miguez,et al.  Winter Cover Crops in Illinois: Evaluation of Ecophysiological Characteristics of Corn , 2006 .

[22]  S. Polasky,et al.  Land Clearing and the Biofuel Carbon Debt , 2008, Science.

[23]  J. R. Hess,et al.  Cellulosic biomass feedstocks and logistics for ethanol production , 2007 .

[24]  S. Snapp,et al.  Use of N immobilization to tighten the N cycle in conventional agroecosystems. , 2010, Ecological applications : a publication of the Ecological Society of America.

[25]  Agronomic Cropping for Maximum Biomass Production1 , 1978 .

[26]  Bruce N Wilson,et al.  Plant Growth Component of a Simple Rye Growth Model , 2006 .

[27]  A. M. Decker,et al.  Conserving Residual Corn Fertilizer Nitrogen with Winter Cover Crops , 1992 .

[28]  Bryce J. Stokes,et al.  Biomass as Feedstock for A Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply , 2005 .

[29]  Bryce J. Stokes,et al.  U.S. Billion-ton Update: Biomass Supply for a Bioenergy and Bioproducts Industry , 2011 .

[30]  Kevin J. Shinners,et al.  Single-pass, split-stream harvest of corn grain and stover , 2007 .

[31]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[32]  Barbara T. Fichman Annual Energy Review 2011 , 2012 .

[33]  Richard D. Horan,et al.  Economic and Ecological Rules for Water Quality Trading 1 , 2011 .

[34]  William Lane Austin,et al.  The Census of Agriculture , 1930 .

[35]  Frank Taylor,et al.  Grain composition of Virginia winter barley and implications for use in feed, food, and biofuels production , 2010 .

[36]  P. Porter,et al.  Winter Rye Cover Crop Management Influences on Soil Water, Soil Nitrate, and Corn Development , 2011 .

[37]  J. W. Singer,et al.  Method and Timing of Rye Control Affects Soybean Development and Resource Utilization , 2005 .

[38]  James W. Jones,et al.  The DSSAT cropping system model , 2003 .

[39]  J. R. Kiniry,et al.  CERES-Maize: a simulation model of maize growth and development , 1986 .

[40]  G. Bollero,et al.  Cropping system and nitrogen dynamics under a cereal winter cover crop preceding corn , 2004, Plant and Soil.

[41]  M. Tollenaar,et al.  Corn Response to Rye Cover Crop Management and Spring Tillage Systems , 1990 .

[42]  C. Wagner-Riddle,et al.  Modeling a Rye Cover Crop and Subsequent Soybean Yield , 1997 .

[43]  L. Bundy,et al.  Cover Crop Effects on Corn Yield Response to Nitrogen on an Irrigated Sandy Soil , 2005 .

[44]  S. Nusser,et al.  Are cover crops being used in the US corn belt , 2007 .

[45]  G. Sands,et al.  Hydrology and Nitrogen Components of a Simple Rye Growth Model , 2007 .

[46]  T. Ochsner,et al.  Coupling landscape water storage and supplemental irrigation to increase productivity and improve environmental stewardship in the U.S. Midwest , 2012 .

[47]  Robert W. Malone,et al.  SIMULATING THE LONG-TERM PERFORMANCE OF DRAINAGE WATER MANAGEMENT ACROSS THE MIDWESTERN UNITED STATES , 2008 .

[48]  J. Monteith Climate and the efficiency of crop production in Britain , 1977 .

[49]  D. J. Eckert Rye cover crops for no-tillage corn and soybean production , 1988 .

[50]  J. W. Singer,et al.  Self-seeding winter cereal cover crops in soybean , 2007 .