Cited by 135Bioenergy crop production and managementCrop Yield and Soil FertilityPasture and Agricultural Systems

Nitrogen influences biomass and nutrient partitioning by perennial, warm-season grasses

Heggenstaller, Andrew H., Moore, Kenneth J., Liebman, Matt, Anex, Robert P.·2009·Agronomy Journal

Abstract

Recent attention has focused on the use of perennial, warm‐season grasses as renewable energy crops. The objective of this study was to assess the effects of N fertilization on partitioning of biomass and nutrients between above‐ and belowground plant components by four warm‐season grass species in Iowa. In 2006–2007, established stands of big bluestem (Andropogon geradii Vitman), switchgrass (Panicum virgatum L.), indiangrass [Sorghastrum nutans (L.) Nash], and eastern gamagrass [Tripsacum dactyloides (L.) L.] were fertilized with 0, 65, 140, or 220 kg N ha−1 in the spring and harvested following frost in the fall. Dependent on grass species and year, yield response to N was linear or quadratic. Optimum yield after 2 yr was 13.5 Mg ha−1 at 140 kg N ha−1 for all grasses except eastern gamagrass, which demonstrated lower yield and a consistent linear N response. Nitrogen inputs had pronounced but grass‐specific effects on root biomass and nutrient partitioning. For big bluestem and switchgrass, 140 kg N ha−1 maximized root biomass and favored allocation of nutrients to roots over shoots. In contrast, for indiangrass and eastern gamagrass, root biomass and root nutrient allocation were adversely affected by N inputs. For all grasses, 220 kg N ha−1 shifted allocation of nutrients to shoots over roots. Selection of crops and management practices that optimize yield, and maintain a high level of resource partitioning to roots at low to intermediate N input rates will promote the development of productive and efficient bioenergy systems.

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Registry

Crossref · 10.2134/agronj2008.0225x

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  • P mobilization from the shoots to the roots is less than N shoot to root mobilization for upland ecotypes.

    “P mobilization from the shoots to the roots is less than N shoot to root mobilization for upland ecotypes (Heggenstaller et al., 2009).”

    From Field-scale soil property changes under switchgrass managed for bioenergy (2011) · cites this paper as Heggenstaller et al., 2009

  • Switchgrass grown in higher precipitation regions have P removal rates between 7 and 14 kg P ha-1 yr-1.

    “Switchgrass grown in higher precipitation regions have P removal rates between 7 and 14 kg P ha À1 yr À1 (Heggenstaller et al., 2009;Lemus et al., 2009).”

    From Field-scale soil property changes under switchgrass managed for bioenergy (2011) · cites this paper as Heggenstaller et al., 2009

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Authors
Heggenstaller, A. H., Moore, K. J., Liebman, M., & Anex, R. P.
Affiliations
  • MRIGlobal (US)
  • Iowa State University (US)
Corresponding author
Heggenstaller, Andrew H.
Venue
Agronomy Journal
Publisher
Wiley
Published
2009-11
Volume
101
Issue
6
Pages
1363-1371
ISSN
  • 0002-1962 (ISSN-L)
  • 1435-0645
OpenAlex
W1984749459
Cited by
135
References
38
Citations by year
2025: 4 · 2024: 7 · 2023: 8 · 2022: 5 · 2021: 5 · 2020: 7 · 2019: 8 · 2018: 7 · 2017: 16 · 2016: 6 · 2015: 7 · 2014: 12 · 2013: 14 · 2012: 12
FWCI
20.47
Type
journal article
Language
en
Open access
closed
Locations
Agronomy Journal (publishedVersion)
Funders
National Science Foundation (CMS0424700)
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 › Crop Yield and Soil Fertility
  • Life Sciences › Agricultural and Biological Sciences › Forestry › Pasture and Agricultural Systems
Keywords
nitrogen fertilization, biomass allocation, nutrient partitioning, root biomass, big bluestem, Andropogon gerardii, switchgrass, indiangrass, Sorghastrum nutans, eastern gamagrass, Tripsacum dactyloides, energy crops

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