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Harvesting Fertilized Rye Cover Crop: Simulated Revenue, Net Energy, and Drainage Nitrogen Loss

Author

Listed:
  • Malone, R. W.
  • Obrycki, J. F.
  • Karlen, Douglas L
  • Kaspar, T. C.
  • Jaynes, D. B.
  • Parkin, T. B.
  • Lence, S. H.
  • Feyereisen, G. W.
  • Fang, Q. X.
  • Richard, T. L.
  • Gillette, K.

Abstract

Harvesting fertilized rye (Secale cereale L.) cover crop has been suggested as a method to increase producer revenue and biofuel feedstock production, but drainage N loss impacts are currently unknown. Using the tested Root Zone Water Quality Model (RZWQM) across several N rates, spring application of 120 kg N ha-1 prior to winter rye harvest reduced drainage N loss by 54% compared with no cover crop and by 18% compared with planted rye that was neither fertilized nor harvested. Estimates of producer revenue and net energy were also positive, with 8.3 Mg ha-1 of harvested rye biomass. If confirmed by field studies, these results suggest that double-cropping fertilized rye is a promising strategy to increase producer revenue, increase net energy production, and reduce drainage N loss.

Suggested Citation

  • Malone, R. W. & Obrycki, J. F. & Karlen, Douglas L & Kaspar, T. C. & Jaynes, D. B. & Parkin, T. B. & Lence, S. H. & Feyereisen, G. W. & Fang, Q. X. & Richard, T. L. & Gillette, K., 2018. "Harvesting Fertilized Rye Cover Crop: Simulated Revenue, Net Energy, and Drainage Nitrogen Loss," ISU General Staff Papers 201801010800001666, Iowa State University, Department of Economics.
    • Handle: RePEc:isu:genstf:201801010800001666
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