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This article in AJ

  1. Vol. 100 No. 6, p. 1703-1710
    Received: Feb 12, 2008

    * Corresponding author(s): thelenk3@msu.edu
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Use of Manure, Compost, and Cover Crops to Supplant Crop Residue Carbon in Corn Stover Removed Cropping Systems

  1. Bradley E. Fronning,
  2. Kurt D. Thelen * and
  3. Doo-Hong Min
  1. Dep. of Crop and Soil Sci., Michigan State Univ., Plant and Soil Science Building, East Lansing, MI 48824


The emerging cellulosic-based ethanol industry will likely use corn (Zea mays L.) stover as a feedstock source. Growers wishing to maintain, or increase soil C levels for agronomic and environmental benefit will need to use C amendments such as manure, compost, or cover crops, to replace C removed with the corn stover. The objective of this research was to determine the effect of cover crops, manure, and compost on short-term C sequestration rates and net global warming potential (GWP) in a corn–soybean [Glycine max (L.) Merr.] rotation with complete corn stover removal. Field experiments consisting of a corn–soybean–corn rotation with whole-plant corn harvest, were conducted near East Lansing, MI over a 3-yr period beginning in the fall of 2001. Carbon amendments were: compost, manure, and a winter cereal rye (Secale cereale L.) cover crop. Compost and manure amendments raised soil C levels in the 0 to 5 and 0 to 25 cm soil profile but not in the 5 to 25 cm soil profile over the relatively short-term duration of the study. Total soil organic C (SOC) (kg ha−1) in the 0 to 25 cm profile increased by 41 and 25% for the compost and manure treatments, respectively, and decreased by 3% for the untreated check. Compost and manure soil amendments resulted in a net GWP of −1811 and −1060 g CO2 m−2 yr−1, respectively, compared to 12 g CO2 m−2 yr−1 for untreated.

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Copyright © 2008. American Society of AgronomyCopyright © 2008 by the American Society of Agronomy