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Title: Soil nitrogen dynamics in switchgrass seeded to a marginal cropland in South Dakota

Journal Article · · Global Change Biology. Bioenergy
DOI:https://doi.org/10.1111/gcbb.12475· OSTI ID:1375481
 [1];  [2]; ORCiD logo [1];  [3];  [3];  [4]
  1. Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings SD 57007 USA
  2. Department of Life Science and Environmental Biochemistry, Pusan National University, Busan 46241 Korea
  3. USDA-ARS, North Central Agricultural Research Laboratory, Brookings SD 57006 USA
  4. North Central Sun Grant Center, South Dakota State University, Brookings SD 57007 USA

The potential ecological impacts of switchgrass (Panicum virgatum L.), as a biofuel feedstock, have been assessed under different environmental conditions. However, limited information is available in understanding the integrated analysis of nitrogen (N) dynamics including soil nitrate (NO3), nitrous oxide (N2O) emissions, and NO3 leaching under switchgrass land management. The specific objective was to explore N dynamics for 2009 through 2015 in switchgrass seeded to a marginally yielding cropland based on treatments of N fertilization rate (N rate; low, 0; medium, 56; high, 112 kg N ha–1) and landscape position (shoulder, backslope, and footslope). Our findings indicated that N rate impacted soil NO3 (0–5 cm depth) and surface N2O fluxes but did not impact NO3 leaching during the observed years. Medium N (56 kg N ha–1) was the optimal rate for increasing biomass yield with reduced environmental problems. Landscape position impacted the N dynamics. At the footslope position, soil NO3, soil NO3 leaching, and N2O fluxes were higher than the other landscape positions. Soil N2O fluxes and NO3 leaching had downward trends over the observed years. Growing switchgrass on marginally yielding croplands can store soil N, reduce N losses via leaching, and mitigate N2O emissions from soils to the atmosphere over the years. Switchgrass seeded on marginally yielding croplands can be beneficial in reducing N losses and can be grown as a sustainable bioenergy crop on these marginal lands.

Research Organization:
South Dakota State Univ., Brookings, SD (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office
Grant/Contract Number:
FC36-05GO85041; EE0007088
OSTI ID:
1375481
Alternate ID(s):
OSTI ID: 1375482; OSTI ID: 1511049; OSTI ID: 1836072
Report Number(s):
DOE-ANTARES-07088-12
Journal Information:
Global Change Biology. Bioenergy, Journal Name: Global Change Biology. Bioenergy; ISSN 1757-1693
Publisher:
WileyCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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