Developmental Morphology and Biomass Yield of Upland and Lowland Switchgrass Ecotypes Grown in Iowa

dc.contributor.author Heaton, Emily
dc.contributor.author Moore, Kenneth
dc.contributor.author Lenssen, Andrew
dc.contributor.author Archontoulis, Sotirios
dc.contributor.author Heaton, Emily
dc.contributor.author Fei, Shuizhang
dc.contributor.department Agronomy
dc.contributor.department Horticulture
dc.date 2019-02-03T09:58:31.000
dc.date.accessioned 2020-06-29T23:06:11Z
dc.date.available 2020-06-29T23:06:11Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.issued 2018-01-01
dc.description.abstract <p>Sustainable development of the bioenergy industry will depend upon the amount and quality of bioenergy feedstock produced. Switchgrass (Panicum virgatum L.) is a model lignocellulosic bioenergy crop but critical information is lacking for improved management, growth, and development simulation model calibration. A field study was conducted near Ames, IA during 2012–2013 with the objective to evaluate upland (“Cave-in-Rock”, ‘Trailblazer’ and ‘Blackwell’) and lowland (“Kanlow” and “Alamo”) switchgrass ecotypes for harvest timing on morphology (i.e., phenology, leaf area index (LAI), and biomass yield). The experiment used a randomized complete block design, with three upland and two lowland varieties harvested at six dates annually. In both years, delaying harvest to later maturity increased biomass yield; lowland cultivars produced greater biomass yield (6.15 tons ha−1) than upland ecotypes (5.10 tons ha−1). Lowland ecotypes had delayed reproductive development compared with upland ecotypes. At the end of both growing seasons, upland ecotypes had greater mean stage count (MSC) than lowland ecotypes. “Cave-in-Rock” had greatest MSC and LAI, but did not produce the greatest biomass. Relationships were nonlinear between MSC and biomass yield, with significant cultivar–year interaction. The relationship between biomass yield and MSC will be useful for improving switchgrass, including cultivar selection, fertilizer application, and optimum harvest time.</p>
dc.description.comments <p>This article is published as Aurangzaib, Muhammad, Kenneth J. Moore, Andrew W. Lenssen, Sotirios V. Archontoulis, Emily A. Heaton, and Shuizhang Fei. "Developmental Morphology and Biomass Yield of Upland and Lowland Switchgrass Ecotypes Grown in Iowa." <em>Agronomy</em> 8, no. 5 (2018): 61. doi: <a href="http://dx.doi.org/10.3390/agronomy8050061" target="_blank">10.3390/agronomy8050061</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/561/
dc.identifier.articleid 1608
dc.identifier.contextkey 13641003
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/561
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4929
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/561/2018_Lenssen_DevelopmentalMorphology.pdf|||Sat Jan 15 00:57:23 UTC 2022
dc.source.uri 10.3390/agronomy8050061
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Horticulture
dc.subject.disciplines Oil, Gas, and Energy
dc.subject.keywords Panicum virgatum L.
dc.subject.keywords biomass yield
dc.subject.keywords biomass harvest
dc.subject.keywords grass staging
dc.subject.keywords grass morphology
dc.subject.keywords switchgrass development
dc.subject.keywords leaf area index
dc.title Developmental Morphology and Biomass Yield of Upland and Lowland Switchgrass Ecotypes Grown in Iowa
dc.type article
dc.type.genre article
dspace.entity.type Publication
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