Seasonal dynamics of above- and below-ground biomass and nitrogen partitioning in Miscanthus × giganteus and Panicum virgatum across three growing seasons
dc.contributor.author | Dohleman, Frank | |
dc.contributor.author | Heaton, Emily | |
dc.contributor.author | Arundale, Rebecca | |
dc.contributor.author | Long, Stephen | |
dc.contributor.department | Department of Agronomy | |
dc.date | 2018-01-24T20:18:36.000 | |
dc.date.accessioned | 2020-06-29T23:04:34Z | |
dc.date.available | 2020-06-29T23:04:34Z | |
dc.date.copyright | Sun Jan 01 00:00:00 UTC 2012 | |
dc.date.issued | 2012-09-01 | |
dc.description.abstract | <p>The first replicated productivity trials of the C4 perennial grass <em>Miscanthus</em> × <em>giganteus</em> in the United States showed this emerging ligno-cellulosic bioenergy feedstock to provide remarkably high annual yields. This covered the 5 years after planting, leaving it uncertain if this high productivity could be maintained in the absence of N fertilization. An expected, but until now unsubstantiated, benefit of both species was investment in roots and perennating rhizomes. This study examines for years 5–7 yields, biomass, C and N in shoots, roots, and rhizomes. The mean peak shoot biomass for <em>M</em>. × <em>giganteus</em> in years 5–7 was 46.5 t ha−1 in October, declining to 38.1 t ha−1 on completion of senescence and at harvest in December, and 20.7 t ha−1 declining to 11.3 t ha−1 for <em>Panicum virgatum</em>. There was no evidence of decline in annual yield with age. Mean rhizome biomass was significantly higher in <em>M</em>. × <em>giganteus</em> at 21.5 t ha−1compared to 7.2 t ha−1 for <em>P. virgatum</em>, whereas root biomass was similar at 5.6–5.9 t ha−1. <em>M</em>. × <em>giganteus</em> shoots contained 339 kg ha−1 N in August, declining to 193 kg ha−1 in December, compared to 168 and 58 kg ha−1 for <em>P. virgatum</em>. The results suggest substantial remobilization of N to roots and rhizomes, yet still a substantial loss with December harvests. The shoot and rhizome biomass increase of 33.6 t ha−1 during the 2-month period between June and August for <em>M</em>. × <em>giganteus</em> corresponds to a solar energy conversion of 4.4% of solar energy into biomass, one of the highest recorded and confirming the remarkable productivity potential of this plant.</p> | |
dc.description.comments | <p>This article is published as Dohleman, Frank G., Emily A. Heaton, Rebecca A. Arundale, and Stephen P. Long. "Seasonal dynamics of above‐and below‐ground biomass and nitrogen partitioning in Miscanthus× giganteus and Panicum virgatum across three growing seasons." Gcb Bioenergy 4, no. 5 (2012): 534-544. doi: <a href="http://dx.doi.org/10.1111" target="_blank">10.1111/j.1757-1707.2011.01153.x</a>. Posted with permission.</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/agron_pubs/359/ | |
dc.identifier.articleid | 1361 | |
dc.identifier.contextkey | 11388780 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | agron_pubs/359 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/4708 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/agron_pubs/359/2012_Heaton_SeasonalDynamics.pdf|||Fri Jan 14 23:45:53 UTC 2022 | |
dc.source.uri | 10.1111/j.1757-1707.2011.01153.x | |
dc.subject.disciplines | Agricultural Science | |
dc.subject.disciplines | Agriculture | |
dc.subject.disciplines | Agronomy and Crop Sciences | |
dc.subject.keywords | bioenergy | |
dc.subject.keywords | biofuel | |
dc.subject.keywords | C4 photosynthesis | |
dc.subject.keywords | nitrogen use efficiency | |
dc.subject.keywords | photosynthetic efficiency | |
dc.subject.keywords | rhizome | |
dc.subject.keywords | roots | |
dc.subject.keywords | solar energy conversion efficiency | |
dc.title | Seasonal dynamics of above- and below-ground biomass and nitrogen partitioning in Miscanthus × giganteus and Panicum virgatum across three growing seasons | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | 716d7071-adb0-4700-9b63-b9da2205795e | |
relation.isOrgUnitOfPublication | fdd5c06c-bdbe-469c-a38e-51e664fece7a |
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