Environmental factors function as constraints on soil nitrous oxide fluxes in bioenergy feedstock cropping systems
[1];
[1];
[2];
[2];
[2];
[1]
- Department of Agronomy DOE‐Great Lakes Bioenergy Research Center University of Wisconsin‐Madison Madison Wisconsin
- W. K. Kellogg Biological Station Michigan State University Hickory Corners Michigan, Department of Plant, Soil, and Microbial Sciences DOE‐Great Lakes Bioenergy Research Center Michigan State University East Lansing Michigan
Abstract Nitrous oxide (N 2 O) is a potent greenhouse gas and major component of the net global warming potential of bioenergy feedstock cropping systems. Numerous environmental factors influence soil N 2 O production, making direct correlation difficult to any one factor of N 2 O fluxes under field conditions. We instead employed quantile regression to evaluate whether soil temperature, water‐filled pore space ( WFPS ), and concentrations of soil nitrate ( ) and ammonium ( ) determined upper bounds for soil N 2 O flux magnitudes. We collected data over 6 years from a range of bioenergy feedstock cropping systems including no‐till grain crops, perennial warm‐season grasses, hybrid poplar, and polycultures of tallgrass prairie species each with and without nitrogen (N) addition grown at two sites. The upper bounds for soil N 2 O fluxes had a significant and positive correlation with all four environmental factors, although relatively large fluxes were still possible at minimal values for nearly all factors. The correlation with was generally weaker, suggesting it is less important than in driving large fluxes. Quantile regression slopes were generally lower for unfertilized perennials than for other systems, but this may have resulted from a perpetual state of nitrogen limitation, which prevented other factors from being clear constraints. This framework suggests efforts to reduce concentrations of in the soil may be effective at reducing high‐intensity periods—”hot moments”—of N 2 O production.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States); Battelle Memorial Institute, Columbus, OH (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- FC02-07ER64494; AC05-76RL01830
- OSTI ID:
- 1479153
- Alternate ID(s):
- OSTI ID: 1479154; OSTI ID: 1609259
- Journal Information:
- Global Change Biology. Bioenergy, Journal Name: Global Change Biology. Bioenergy Vol. 11 Journal Issue: 2; ISSN 1757-1693
- Publisher:
- Wiley-BlackwellCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
Similar Records
Impoverishing Roots Will Improve Wheat Yield and Profitability Through Increased Water and Nitrogen Use Efficiencies
PlanHab * : hypoxia does not worsen the impairment of skeletal muscle oxidative function induced by bed rest alone