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Title: Effects of fertilization, plant species, and intra-specific diversity on soil carbon and nitrogen in biofuel cropping systems after five growing seasons

Abstract

Land-use change for bioenergy production can release greenhouse gases (GHG) through disturbance of soil carbon (C) pools, but use of native species with extensive root systems as bioenergy crops may help mitigate GHG emissions by enhancing soil C sequestration. Here, we investigated how (1) fertilization, (2) plant species and cultivars, and (3) inter- and intra-specific diversity affect soil C and N accumulation five growing seasons after conversion of an old-field dominated by C 3 grasses to a grassland dominated by C 4 perennial grasses managed for biofuel production. We manipulated diversity at both the species- and cultivar level, and applied nitrogen (N) at two levels (0 and 67 kg ha –1). Establishment of C 4 grass treatments on soils that supported C 3 pasture grasses for 36 years enabled us to use the natural abundance C isotope ratio technique to estimate the contribution of new C 4 plant-derived C to soil organic matter pools. Our study yielded three main results: 1) annual fertilization did not significantly affect soil C and N concentrations after five growing seasons; 2) increasing inter- and intra-specific diversity did not significantly increase soil C and N concentrations; 3) cultivar- and species identity influenced C 4-derived Cmore » and total soil C concentrations: big bluestem dominated stands exhibited greater soil C accrual relative to stands dominated by switchgrass and mixed-species treatments. Here, future research is needed to further assess how big bluestem can aid in the sustainable provisioning of second generation biofuel feedstocks.« less

Authors:
 [1];  [2];  [3];  [1]
  1. Boise State Univ., Boise, ID (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Kansas State Univ., Manhattan, KS (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); U.S. Department of Agriculture (USDA), National Institute of Food and Agriculture (NIFA)
OSTI Identifier:
1573246
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Biomass and Bioenergy
Additional Journal Information:
Journal Volume: 130; Journal Issue: C; Journal ID: ISSN 0961-9534
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Big bluestem; Bioenergy crops; Diversity; Fertilization; Soil carbon; Switchgrass

Citation Formats

Adkins, Jaron, Jastrow, Julie D., Morris, Geoffrey P., and de Graaff, Marie-Anne. Effects of fertilization, plant species, and intra-specific diversity on soil carbon and nitrogen in biofuel cropping systems after five growing seasons. United States: N. p., 2019. Web. doi:10.1016/j.biombioe.2019.105393.
Adkins, Jaron, Jastrow, Julie D., Morris, Geoffrey P., & de Graaff, Marie-Anne. Effects of fertilization, plant species, and intra-specific diversity on soil carbon and nitrogen in biofuel cropping systems after five growing seasons. United States. doi:10.1016/j.biombioe.2019.105393.
Adkins, Jaron, Jastrow, Julie D., Morris, Geoffrey P., and de Graaff, Marie-Anne. Thu . "Effects of fertilization, plant species, and intra-specific diversity on soil carbon and nitrogen in biofuel cropping systems after five growing seasons". United States. doi:10.1016/j.biombioe.2019.105393.
@article{osti_1573246,
title = {Effects of fertilization, plant species, and intra-specific diversity on soil carbon and nitrogen in biofuel cropping systems after five growing seasons},
author = {Adkins, Jaron and Jastrow, Julie D. and Morris, Geoffrey P. and de Graaff, Marie-Anne},
abstractNote = {Land-use change for bioenergy production can release greenhouse gases (GHG) through disturbance of soil carbon (C) pools, but use of native species with extensive root systems as bioenergy crops may help mitigate GHG emissions by enhancing soil C sequestration. Here, we investigated how (1) fertilization, (2) plant species and cultivars, and (3) inter- and intra-specific diversity affect soil C and N accumulation five growing seasons after conversion of an old-field dominated by C3 grasses to a grassland dominated by C4 perennial grasses managed for biofuel production. We manipulated diversity at both the species- and cultivar level, and applied nitrogen (N) at two levels (0 and 67 kg ha–1). Establishment of C4 grass treatments on soils that supported C3 pasture grasses for 36 years enabled us to use the natural abundance C isotope ratio technique to estimate the contribution of new C4 plant-derived C to soil organic matter pools. Our study yielded three main results: 1) annual fertilization did not significantly affect soil C and N concentrations after five growing seasons; 2) increasing inter- and intra-specific diversity did not significantly increase soil C and N concentrations; 3) cultivar- and species identity influenced C4-derived C and total soil C concentrations: big bluestem dominated stands exhibited greater soil C accrual relative to stands dominated by switchgrass and mixed-species treatments. Here, future research is needed to further assess how big bluestem can aid in the sustainable provisioning of second generation biofuel feedstocks.},
doi = {10.1016/j.biombioe.2019.105393},
journal = {Biomass and Bioenergy},
number = C,
volume = 130,
place = {United States},
year = {2019},
month = {10}
}

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This content will become publicly available on October 17, 2020
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