10.5061/DRYAD.931ZCRJM3
Smercina, Darian
0000-0002-8484-3827
Pacific Northwest National Laboratory
Evans, Sarah E.
0000-0001-6728-4499
Michigan State University
Friesen, Maren L.
0000-0002-4274-8928
Washington State University
Tiemann, Lisa K.
0000-0003-0514-6503
Michigan State University
Data from: Temporal dynamics of free‐living nitrogen fixation in the
switchgrass rhizosphere
Dryad
dataset
2021
United States Department of Energy
https://ror.org/01bj3aw27
DE‐FC02‐07ER64494
United States Department of Energy
https://ror.org/01bj3aw27
DE‐SC0014108
United States Department of Energy
https://ror.org/01bj3aw27
DE‐SC0018409
2021-10-14T00:00:00Z
2021-10-14T00:00:00Z
en
https://doi.org/10.1111/gcbb.12893
273861 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Here we present data associated with the manuscript, Temporal dyanmics of
free-living nitrogen fixation in the switchgrass rhizosphere. Free-living
nitrogen fixation (FLNF) represents an important terrestrial N source and
is gaining interest for its potential to contribute plant available N to
bioenergy cropping systems. Switchgrass, a cellulosic bioenergy crop, may
be reliant on FLNF when particularly when grown on low N marginal lands.
These potential contributions of FLNF to switchgrass and the controls on
this process are not well understood. We evaluated drivers of FLNF rates
and N-fixing microbial community composition in field-grown switchgrass
systems over two years with high temporal sampling. We found climate
variables to be strong drivers of FLNF in switchgrass systems, compared to
other environmental and biological factors including soil nutrients and
N-fixing microbial community composition. Increased soil moisture
availability tended to promote FLNF, but extreme rainfall events appeared
to be detrimental. These climate-related responses suggest FLNF-derived N
contributions may be reduced under projected climate shifts. We also found
a significant, but weak correlation between N-fixing microbial community
composition and FLNF rates including an observed shift in community
composition between 2017 and 2018 and a similarly significant difference
in FLNF rates between years. Lastly, we found that seasonal FLNF N
contributions, based on measurement with high temporal resolution,
may meet up to 80% of switchgrass N demands.
Details on data collection can be found in the associated open access
journal article, Temporal dynamics of free‐living nitrogen fixation in the
switchgrass rhizosphere. This can be accessed at the following
link: https://onlinelibrary.wiley.com/doi/full/10.1111/gcbb.12893.
Reported values include all pseudoreplicate values prior to averaging for
statistical analysis as described in the associated manuscript.
Missing values are represented as NA in the dataset.