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Find More Information @ April 2019 Conference Series LLC Ltd 31
6th World Congress on
Climate Change and Global Warming
April 24-25, 2019 | Vancouver, Canada
ACCEPTED ABSTRACT JOURNAL OF EARTH SCIENCE & CLIMATIC CHANGE, 2019 VOLUME 10 | DOI: 10.4172/2157-7617-C1-057
Water conservation
practices on the
reduction of greenhouse
gas emissions on creeping
bentgrass greens
Katy E Chapman and Kristina S Walker
University of Minnesota, USA
Statement of the Problem: Soil
moisture and temperature are
known predictors of greenhouse
gas (GHG) losses from highly
managed turfgrass. Irrigation
management practices that
conserve water use have the
potential to reduce GHG losses
but may adversely affect overall
turfgrass quality.
Methodology and Theoretical
Orientation: A field study
was developed to evaluate
the impact irrigation regimes
(Business as Usual [sun and
shade], Supplemental Rainfall,
Syringing and Natural Rainfall),
nitrogen (N) source (Urea and
Milorganite) and rate (146kg N
ha-1 yr-1 and 293kg N ha-1 yr-1)
has on GHG (carbon dioxide
[CO2], methane [CH4] and nitrous
oxide [N2O]) emissions from
creeping bentgrass (Agrostis
stolonifera) greens. Sampling
occurred weekly throughout
the 2015-2017 growing season.
Gas samples were taken using a
vented closed gas chamber for
40minutes. Soil temperature, soil
moisture, canopy temperature,
canopy greenness and turfgrass
quality data were also collected.
Conclusion and Significance:
Results indicate that nitrogen
sources applied at the high N
rate resulted in significantly
higher emissions of both CO 2 and
N2O. Irrigation practices exposed
to full sunlight (Supplemental
Rainfall, Syringing, Business as
Usual Sun), thus having a higher
soil temperature, resulted in
significantly higher emissions
of both CO2 and N2 O; the
reverse was true for irrigation
treatments experiencing shade
from nearby trees. Both turfgrass
quality and canopy greenness
were significantly impacted by
irrigation practices, N source
and rate. Canopy greenness was
improved with the higher rate
of Milorganite and urea. Higher
turfgrass quality was associated
with the use of Milorganite at
both the high and low N rates.
Water conservation practices
implemented on non-shaded
greens resulted in higher soil
and canopy temperatures (May-
September) that contributed
to GHG losses from creeping
bentgrass putting greens.