|
Parameters
|
June
|
July
|
August
|
September
|
October
|
|---|
|
CH4 concentration (ppm)
|
2.2 d* ± 0.0
|
2.8 c ± 0.2
|
2.9 bc ± 0.2
|
3.3 ab ± 0.2
|
3.5 a ± 0.7
|
|
CO2 concentration (ppm)
|
380.2 b ± 5.9
|
486.2 a ± 19.4
|
459.3 a ± 21.5
|
404.0 b ± 19.0
|
368.6 b ± 14.3
|
|
N2O concentration (ppm)
|
1.1 a ± 0.2
|
1.0 a ± 0.2
|
1.1 a ± 0.2
|
0.6 b ± 0.0
|
0.4 b ± 0.0
|
|
CH4 FR (g m-2d-1)
|
1.1 d ± 0.0
|
1.4 c ± 0.1
|
1.4 bc ± 0.1
|
1.6 ab ± 0.1
|
1.7 a ± 0.3
|
|
CO2 FR (g m-2d-1)
|
507.6 b ± 7.9
|
649.2 a ± 26.0
|
613.3 a ± 21.5
|
539.4 b ± 19.0
|
492.1 b ± 14.3
|
|
N2O FR (g m-2d-1)
|
1.4 a ± 0.3
|
1.4 a ± 0.2
|
1.5 a ± 0.3
|
0.8 b ± 0.0
|
0.5 b ± 0.0
|
|
CH4 EF (g d-1 hd-1)
|
40.5 b ± 1.2
|
52.7 ab ± 3.8
|
54.2 b ± 3.8
|
62.4 a ± 2.3
|
63.7 a ± 11.6
|
|
CO2 EF(g d-1 hd-1)
|
19487 b ± 624
|
24958 a ± 326
|
23584 a ± 326
|
20693 b ± 143
|
18541 b ± 431
|
|
N2O EF (g d-1 hd-1)
|
55.2 a ± 11.0
|
53.3a ± 9.3
|
58.2 a ± 9.6
|
29.6b ± 1.4
|
17.7 b ± 0.9
|
|
CH4 EF (g d-1 AU-1)
|
53.2 ab ± 7.9
|
57.6 a ± 6.7
|
51.2 b ± 10.2
|
52.8 ab ± 6.2
|
52.0 ab ± 14.9
|
|
CO2 EF(kg d-1 AU-1)
|
25.5 a ± 2.6
|
26.9 a ± 2.0
|
22.2 b ± 2.9
|
17.5 c ± 1.8
|
15.1 c ± 0.8
|
|
N2O EF(g d-1 AU-1)
|
67.0 a ± 29.0
|
57.7 a ± 18.5
|
55.8 a ± 27.7
|
24.9 b ± 8.1
|
14.5 c ± 2.0
|
-
*Values followed by the same letter in row are not significantly different at P ≤ 0.05
