Table 2.
Initial nitrate concentration at T = 0 and percentage of nitrate in field fresh soils (n = 4), potential net nitrification rate (PNN) and percentage of nitrate in incubated soils (n = 4), net nitrate accumulation rate (NNA) measured with resin beds in the field (n = 30). Mean values and standard variation. In bold and *, sites (n = 11) where soil humidity, soil solution chemistry and nutrient fluxes are measured.
| Site | T = 0 (mg N-NO3− kg soil) | % (N-NO3−) | PNN (mg N-NO3− kg soil−1 day−1) | % (N-NO3−) | NNA (kg N-NO3− ha−1 yr−1) |
|---|---|---|---|---|---|
| ADI | 22,18 ( ± 10,25) | 88 | 0,37 ( ± 0,22) | 95 | |
| ALL* | 13,36 ( ± 6,27) | 93 | 1,05 ( ± 0,45) | 100 | 25,79 ( ± 5,12) |
| BOU | 5,78 ( ± 1,90) | 82 | 0,37 ( ± 0,14) | 99 | |
| CONT* | 19,99 ( ± 6,16) | 99 | 0,69 ( ± 0,25) | 100 | 36,39 ( ± 8,13) |
| DOU34 | 7,90 ( ± 1,81) | 95 | 0,62 ( ± 0,29) | 98 | |
| GAI* | 10,30 ( ± 0,80) | 75 | 0,63 ( ± 0,21) | 98 | 42,09 ( ± 11,20) |
| MEY* | 4,03 ( ± 1,37) | 62 | 0,19 ( ± 0,11) | 53 | 4,30 ( ± 2,27) |
| MIG | 10,95 ( ± 1,87) | 85 | 0,83 ( ± 0,10) | 91 | |
| MONT* | 29,44 ( ± 12,44) | 99 | 0,44 ( ± 0,12) | 99 | 78,18 ( ± 14,55) |
| OLL* | 3,10 ( ± 1,59) | 80 | 0,38 ( ± 0,11) | 94 | 28,87 ( ± 10,38) |
| ORL-F* | 2,31 ( ± 0,91) | 80 | 0,64 ( ± 0,13) | 96 | 10,53 ( ± 3,00) |
| ORL-T* | 7,39 ( ± 1,76) | 78 | 0,81 ( ± 0,07) | 99 | 18,53 ( ± 4,95) |
| PAU* | 6,75 ( ± 3,22) | 94 | 0,60 ( ± 0,20) | 99 | 37,86 ( ± 12,05) |
| PEY-F | 10,60 ( ± 6,25) | 96 | 0,58 ( ± 0,15) | 98 | |
| PEY-T | 11,93 ( ± 1,48) | 91 | 0,53 ( ± 0,19) | 99 | |
| PIQ | 12,93 ( ± 2,02) | 92 | 0,47 ( ± 0,04) | 98 | |
| ROQ* | 10,30 ( ± 8,13) | 82 | 0,29 ( ± 0,05) | 99 | 101,26 ( ± 23,24) |
| SAL-B | 4,07 ( ± 0,73) | 53 | 0,10 ( ± 0,15) | 83 | |
| SAL-H | 27,32 ( ± 12,81) | 95 | 0,68 ( ± 0,12) | 100 | |
| VIL* | 10,66 ( ± 5,38) | 84 | 0,34 ( ± 0,12) | 98 | 63,15 ( ± 12,24) |
| VULC | 19,05 ( ± 7,46) | 98 | 0,66 ( ± 0,27) | 99 |