Table 4.
Content of total organic C (TOC), water extractable organic C (WEOC) and microbial biomass C (Cmic), and amount of CO2 evolved during basal respiration experiments (Res) for the soils under integrated (INT), traditional organic (ORG) and innovative organic (ORG+) cropping systems (FieldLab-DSA3, Perugia, Italy). Numbers in parentheses are the standard errors (n=2).
| TOC | WEOC | Cmic | Res | |
|---|---|---|---|---|
| g kg-1 | mg kg-1 | mg kg-1 | mg kg-1 | |
| INT | ||||
| Ap1 | 8.2(0.4) | 144.8(11.1) | 68.73(28.8) | 787.8(480.7) |
| Ap2 | 9.1(0.5) | 23.3(0.3) | 78.84(22.5) | 305.0(3.1) |
| Bw1 | 7.5(0.2) | 21.9(0.7) | 95.02(46.2) | 248.7(35.8) |
| Bw2 | 6.9(0.5) | 18.9(0.8) | 87.47(23.7) | 200.1(39.7) |
| BC | 4.2(0.2) | 15.3(2.1) | 59.01(16.3) | 153.6(34.4) |
| ORG | ||||
| Ap1 | 8.8(0.2) | 144.1(3.8) | 141.98(26.4) | 578.6(9.8) |
| Ap2 | 8.7(0.5) | 24.0(0.3) | 81.07(54.5) | 488.1(32.6) |
| Bw1 | 8.1(0.4) | 20.0(0.4) | 119.9(45.8) | 463.0(131.3) |
| Bw2 | 6.6(0.2) | 18.8(0.9) | 100.1(33.4) | 375.5(65.0) |
| BC | 5.2(0.6) | 16.7(2.4) | 66.63(1.5) | 252.7(14.1) |
| ORG+ | ||||
| Ap1 | 11.5(0.9) | 150.0(2.6) | 164.1(37.1) | 777.8(164.7) |
| Ap2 | 8.1(0.6) | 24.1(1.1) | 115.98(5.9) | 345.4(11.8) |
| Ap3 | 7.6(0.2) | 19.3(1.2) | 122.14(13.3) | 266.2(72.2) |
| Bw1 | 8.2(0.4) | 24.0(1.5) | 121.86(27.2) | 385.5(90.5) |
| Bw2 | 6.7(0.2) | 28.8(6.9) | 78.73(1.6) | 320.6(62.3) |
| BC | 5.1(0.3) | 22.5(2.3) | 55.78(5.5) | 273.7(66.8) |