Skip to Main Content
Sustainability of corn stover harvest strategies in PennsylvaniaAuthor(s): Paul R. Adler; Benjamin M. Rau; Gregory W. Roth
Source: BioEnergy Research
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
Download Publication (855.81 KB)
DescriptionPennsylvania farmers have a long history of harvesting corn (Zea mays L.) stover after grain harvest for animal bedding and feed or as a component of mushroom compost, or as silage for dairy cattle feed. With the shallow soils and rolling topography, soil erosion and carbon losses have been minimized through extensive use of cover crops, no-till, and organic matter additions from animal manure. Our objective was to determine the effect of harvesting corn stover as a feedstock for bioenergy production in continuous corn or corn–soybean [Glycine max (L.) Merr.] rotations on corn grain and stover yields, soil carbon, nitrogen, phosphorus, potassium, and the potential for cover crops to mitigate negative impacts of stover harvest. Although there was not a significant effect of stover harvest on corn grain yields in continuous corn, stover harvest tended to increase yields in years with wet springs but decreased them in dry years. Under the corn soybean rotation, 100 % stover removal always resulted in lower grain yields. The harvest index (HI) varied from 0.45 to >0.6 over the 5-year period with the lowest HI values being in response to a late summer drought and highest values being associated with an early summer drought. In most cases, 60 % soil cover was maintained in fall and spring with 50 % harvest of corn stover. Without a rye (Secale cereale L.) cover crop, surface residue for 100 % stover harvest ranged from 20 to 30 %, whereas it was greater than 40 % when rye was established promptly in the fall. Soil carbon was similar across stover removal levels, crop rotations, and cover crops, as were soil nitrogen, phosphorus, and potassium concentrations, since nutrient removal by the grain and stover were replaced with fertilizer additions. Based on the crop yield, surface cover, and soil nutrient responses, partial stover removal could be sustainable under typical climate and management practices in Pennsylvania.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationAdler, Paul R.; Rau, Benjamin M.; Roth, Gregory W. 2015. Sustainability of corn stover harvest strategies in Pennsylvania. BioEnergy Research. 11 p.
KeywordsBioenergy, Corn stover, Soil carbon, Soil cover, Sustainability
- Response surface methodology (RSM) to evaluate moisture effects on corn stover in recovering xylose by DEO hydrolysis
- Linking resilience theory and diffusion of innovations theory to understand the potential for perennials in the U.S. Corn Belt
- Impact of cover crop on corn–soybean productivity and soil water dynamics under different seasonal rainfall patterns
XML: View XML