NDLI: Species Composition Changes in Conservation Reserve Program (CRP) Grassland When Managed for Biomass Feedstock Production : Species Composition Changes in CRP...

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Species Composition Changes in Conservation Reserve Program (CRP) Grassland When Managed for Biomass Feedstock Production : Species Composition Changes in CRP...

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BioEnergy Research : Volume 9, Issue 3, September 2016

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BioEnergy Research : Volume 7

BioEnergy Research : Volume 6

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Species Composition Changes in Conservation Reserve Program (CRP) Grassland When Managed for Biomass Feedstock Production : Species Composition Changes in CRP...

Content Provider	Springer Nature Link
Author	Harmoney, Keith R. Lee, D. K. Kallenbach, R. L. Aberle, E. Z.
Copyright Year	2016
Abstract	Grasslands enrolled in the Conservation Reserve Program (CRP) serve as one of the potential national herbaceous resources for use as a dedicated bioenergy feedstock. The goal of this project was to assess the yield potential and suitability of CRP grassland as a bioenergy feedstock source across the USA in regions with significant CRP land resources. In addition to that goal, one major objective of this project was to assess vegetation composition changes that also occurred on these different CRP grasslands over time with different harvest and fertilization management strategies. Three levels of nitrogen fertilization (0, 56, and 112 kg ha$^{−1}$) and two harvest timings [peak standing crop (PSC) or end of growing season (EGS)] were evaluated for effects on biomass production and resulting species composition changes. Three sites in regions containing concentrated tracts of CRP grassland and representing variable climatic parameters were analyzed for vegetation composition trends over the course of six growing seasons (2008–2013). Specifically, a mixture of warm-season perennial grasses was evaluated in Kansas (KS), while a cool-season mixture was evaluated in Missouri (MO). North Dakota (ND) contained a mixture of both warm- and cool-season grasses. At the MO and KS sites, nitrogen fertilization significantly altered the grass and legume composition over time by lowering the legume percentage in the stand. In KS and ND, the two sites with warm-season grasses, harvesting in mid-summer at PSC, greatly reduced warm-season grass composition over time in favor of annual cool-season grass invaders or perennial cool-season grasses. Any shift to less desirable or less productive species limits the ability of these lands to provide a sustainable or reliable feedstock for bioenergy production.
Starting Page	1180
Ending Page	1188
Page Count	9
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	9
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2016-06-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Warm-season grass Cool-season grass Harvest management Nitrogen management Legumes Dry-weight-rank Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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Nitrogen and harvest management of Conservation Reserve Program (CRP) grassland for sustainable biomass feedstock production

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Species Composition Changes in Conservation Reserve Program (CRP) Grassland When Managed for Biomass Feedstock Production : Species Composition Changes in CRP...

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