Fræðaþing landbúnaðarins - 08.02.2008, Page 541

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Water level fluctuations
The same soil cores will be measured for the same gas emission as for the temperature
study described above. The gas will be measured at four different water levels i.e., 40 cm.
from surface, 30 cm. 15cm. and 0 cm. respectively. This study is under development.
Results
This study is still pending and the results presented here is only a presentation of the
results so far which is the emission quantities for the respective gases at different temperatures. These results are still to be statistically evaluated. The results for the respective gas emission and land use management group are listed below: Table 1. The average gas emission quantities of N?0 at different temperatures given in mg N2O m2/day
mg N20 /m2 /day 3°C 8°C 13°C 18°C
Peat land 0,00 0,00 0,06 0,00
Drained 3,73 17,77 2,02 7,93
Hay field 3,37 14,34 8,51 18,32
G-Drained+vegetated 19,10 16,33 19,80 13,54
Table 2. The average gas emission quantities of CH4 at different temperatures given in mg CH4 m2/day
mg CH4/ m2/day 3°C 8°C 13°C 18°C
Peat land 1,06 7,629 647,764 1818,536
Drained 6,616 13,024 12,845 55,396
Hay field 0 0 0 0,854
G-Drained+vegetated 0 0,11 0,035 1,502
Table 3. The average gas emission quantities of CP2 at different temperatures given in mg CO2 m2/day
mg C02 m2 / day 3°C 8°C 13°C 18°C
Peat land 2464 1152 3621 4330
Drained 4540 3076 3607 8872
Hay field 6847 4311 5526 16694
G-Drained+vegetated 4088 3815 720 19809
The averages of all temperatures for each land use management group are shown in the
figures below.