Biomass and seed yields of big bluestem, switchgrass, and intermediate wheatgrass in response to manure and harvest timing at two topographic positions
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Abstract A principle attribute of perennial grasses for biomass energy is the potential for high yields on marginal lands. Objectives of this study were to compare biomass and seed production of intermediate wheatgrass (Thinopyrum intermedium [Host] Barkworth and D.R. Dewey), big bluestem (Andropogon gerardii Vitman), and switchgrass (Panicum virgatum L.) as affected by harvest timing and manure application on two topographic positions (footslope and backslope). Footslope is the hillslope position that forms the inclined surface at the base of a slope and backslope forms the steepest, middle position of the hillslope. Grasses were harvested for biomass at anthesis (summer), after a killing frost (autumn), or the following spring after overwintering in the field. Seed was harvested at maturity during 2003 and 2004. Two rates of beef cattle (Bos taurus L.) manure (target rates of 0 and 150 kg total‐N ha−1) were surface applied annually. Maximum annual biomass yield ranged from 4.4 to 5.2, 2.7 to 4.2, and 3.7 to 5.6 Mg ha−1 for intermediate wheatgrass, big bluestem, and switchgrass, respectively. Biomass yields were not different between fall and spring harvest treatments. Biomass yields of big bluestem and switchgrass at the backslope position were 86% and 96% of biomass yields at the footslope position with normal precipitation, respectively. Manure application increased biomass yield approximately 30% during the second year on both topographic positions. The highest seed yield was obtained from intermediate wheatgrass, followed by switchgrass and big bluestem. Utilizing these management practices in our environment, it appears that switchgrass and big bluestem could be allowed to overwinter in the field without suffering appreciable loss of biomass.
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Switchgrass aboveground biomass yields have shown little variation when evaluated across landscape features in the Central US.
“Switchgrass aboveground biomass yields have shown little variation when evaluated across landscape features in the Central US (Lee et al., 2009;Schmer et al., 2010;Thelemann et al., 2010).”
From Field-scale soil property changes under switchgrass managed for bioenergy (2011) · cites this paper as Lee et al., 2009
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Cites
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Field-scale soil property changes under switchgrass managed for bioenergy
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- Authors
- LEE, D., OWENS, V. N., BOE, A., & KOO, B.
- Affiliations
- University of Illinois Urbana-Champaign (US)
- South Dakota State University (US)
- Rural Development Administration (KR)
- ORCID
- OWENS, VANCE N.
- Venue
- GCB Bioenergy
- Publisher
- Wiley
- Published
- 2009-04
- Volume
- 1
- Issue
- 2
- Pages
- 171-179
- ISSN
- 1757-1693 (ISSN-L)
- 1757-1707
- OpenAlex
- W1989644984
- Cited by
- 46
- References
- 29
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 2 · 2020: 2 · 2019: 5 · 2018: 4 · 2017: 6 · 2016: 6 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 3
- FWCI
- 3.53
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- GCB Bioenergy (publishedVersion)
- Open PRAIRIE (South Dakota State University) (submittedVersion, cc-by)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Agricultural Productivity and Crop Improvement
- Life Sciences › Agricultural and Biological Sciences › Forestry › Pasture and Agricultural Systems
- Keywords
- big bluestem, Andropogon gerardii, switchgrass, Thinopyrum intermedium, biomass yield, seed yield, manure application, beef cattle manure, harvest time, topographic position, perennial grasses, marginal land, biomass energy, overwintering
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