During the four-year study period, higher precipitation
occurred during the MSA period in 2011 (149
mm in total) than in the other three years, making the
field still quite wet even after draining (Fig. 1). No significant
differences in air and soil temperatures were
observed between years (Fig. 2). The surface water
layer was highly variable in depth due to MSA and
dry-wet alternation (Fig. 3). Soil Eh was high when the
surface water layer was low in depth, showing a negative
relationship (Figs. 3 and 4). In 2009 and 2011, as a
result of frequent rain events (Fig. 1), soil Eh dropped
down below 0 mV in most cases during the MSA period,
while it ranged from −245 to 364 mV during the
MSA period in 2008 and 2010. Soil Eh during the drywet
alternation period in 2008 was not measured due
to problems with the oxidation-reduction potential meter.
No significant difference in soil Eh was found between
the treatments in each year.
During the four-year study period, higher precipitation
occurred during the MSA period in 2011 (149
mm in total) than in the other three years, making the
field still quite wet even after draining (Fig. 1). No significant
differences in air and soil temperatures were
observed between years (Fig. 2). The surface water
layer was highly variable in depth due to MSA and
dry-wet alternation (Fig. 3). Soil Eh was high when the
surface water layer was low in depth, showing a negative
relationship (Figs. 3 and 4). In 2009 and 2011, as a
result of frequent rain events (Fig. 1), soil Eh dropped
down below 0 mV in most cases during the MSA period,
while it ranged from −245 to 364 mV during the
MSA period in 2008 and 2010. Soil Eh during the drywet
alternation period in 2008 was not measured due
to problems with the oxidation-reduction potential meter.
No significant difference in soil Eh was found between
the treatments in each year.
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