Effect Site refers to experimental location, date to measurement date, N is N fertilization treatment, CC is soil cover treatment, Rep is replication. | N2O | CO2 | ||
---|---|---|---|---|
F-statistic | p>F | F-statistic | p>F | |
Site | 0.00 | 0.9866 | 6.18 | 0.0180 |
Date | 6.46 | 1.58 | 0.2197 | |
Site × Date | 1.53 | 0.2290 | 9.68 | |
N | 0.51 | 0.4785 | 0.00 | 0.9503 |
Site × N | 2.98 | 0.0922 | 1.21 | 0.2782 |
Date × N | 0.00 | 0.9966 | 3.16 | 0.0553 |
Site × Date × N | 0.05 | 0.9541 | 1.51 | 0.2345 |
CC | 3.33 | 9.17 | <.0001 | |
Site × CC | 0.31 | 0.8716 | 0.25 | 0.9090 |
Date × CC | 1.81 | 0.0967 | 2.84 | |
Site × Date × CC | 0.4 | 0.9137 | 0.78 | 0.6188 |
N × CC | 1.14 | 0.3506 | 1.19 | 0.3325 |
Site × N × CC | 0.68 | 0.6070 | 0.19 | 0.9397 |
Date × N × CC | 1.50 | 0.1825 | 1.79 | 0.1018 |
Site × Date × N × CC | 0.66 | 0.7226 | 0.16 | 0.9954 |
Rep | 0.29 | 0.7510 | 0.73 | 0.4877 |
Date × Rep | 1.18 | 0.3311 | 0.88 | 0.4856 |
Site | Factors | Equation | R2 | p-value |
---|---|---|---|---|
Pötting | Soil mineral N vs CO2 | y = -4.36 + 0.57x | 0.32 | 0.028 |
DOC vs N2O | y = -8.82 + 0.37x | 0.41 | 0.046 | |
Soil water content vs. N2O | y = -16.56 + 0.52x | 0.39 | 0.013 | |
Lichtenwörth | DOC vs. N2O | y = -5.21 + 0.26x | 0.58 | 0.011 |
Soil water content vs. CO2 | y = -14.11 + 0.83x | 0.41 | 0.011 | |
Soil water content vs. N2O | y = -24.63 + 1.04x | 0.56 | 0.001 |
Parameter | Method | Sampling date Sampling dates at the two sites were ± 2 days. |
---|---|---|
Aboveground biomass | Dry matter at 105°C | 14 November 2012 |
CN ratio | CNS analyzer | - |
CO2, N2O | Closed chamber method | 22 November 2012, 1 February 2013, 6 March 2013 |
Soil mineral N | Photometric | 22 November 2012, 1 February 2013, 6 March 2013 |
DOC DOC was measured from a mixed soil sample of three replicates. | Photometric | 22 November 2012, 1 February 2013, 6 March 2013 |
Soil water content | Capacitance | 22 November 2012, 1 February 2013, 6 March 2013 |
Soil temperature | Thermistor | 22 November 2012, 1 February 2013, 6 March 2013 |