Table 3: Summary of carbon dioxide (CO2) fluxes measured from a silt-loam soils at the Rice Research and Extension Center near Stuttgart, AR across years (2018 and 2019), sampling times (1600, 2000, 2400, 0400, 0800, and 1200 hours), and site positions (up-, mid-, and down slope). Reported values are least square means.
|
Position |
|||
Year |
Time |
Up |
Mid |
Down |
|
|
________________ mg m-2 h-1 ________________ |
||
2018 |
1600 |
2092 AB† |
2542 A |
1761 B-D |
|
2000 |
1197 F-K |
1548 C-F |
1169 G-L |
|
2400 |
1017 H-N |
1276 E-I |
971 J-O |
|
400 |
894 L-O |
950 K-O |
878 M-O |
|
800 |
784 N-Q |
784 N-Q |
884 M-O |
|
1200 |
1528 C-F |
1573 B-F |
1412 D-G |
|
|
|
|
|
2019 |
1600 |
1463 C-G |
1858 BC |
1935 BC |
|
2000 |
886 L-O |
993 I-O |
1659 B-E |
|
2400 |
770 O-Q |
1017 H-N |
1371 D-H |
|
400 |
611 Q |
636 PQ |
1157 G-M |
|
800 |
883 M-O |
861 NO |
1240 F-K |
|
1200 |
801 N-P |
1290 E-H |
1270 F-J |
†Means across years, times, and site positions with different letters are different at P < 0.05.