Table 3.
Soil P fractions (mg P kg–1 soil) in the Ci inoculation experiment
| Group | Resin P | NaHCO3-Pi | NaHCO3-Po | NaOH-Pi | NaOH-Po | HCl P |
|---|---|---|---|---|---|---|
| Ci-Ctrl | 1.76±0.01 | 4.13±0.01 | 0.95±0.01 | 2.38±0.01 | 2.76±0.01 | 307±2 |
| CiA | 3.05±0.01* | 4.49±0.04* | 1.44±0.02* | 2.39±0.01 | 3.41±0.01* | 300±3 |
| CiB | 3.98±0.01* | 4.36±0.05* | 1.54±0.01* | 2.38±0.01 | 2.73±0.02 | 299±2 |
| CiF | 2.39±0.01* | 5.84±0.11* | 1.78±0.05* | 2.28±0.02* | 2.83±0.02* | 300±4 |
| CiG | 1.92±0.01* | 4.97±0.07* | 1.34±0.11* | 2.44±0.02* | 2.74±0.01 | 304±3 |
| CiH | 2.43±0.01* | 4.89±0.05* | 1.12±0.02 | 2.52±0.01* | 2.87±0.01* | 302±3 |
| CiP | 2.02±0.02* | 5.62±0.02* | 0.94±0.03 | 2.38±0.02 | 2.76±0.03 | 1800±9* |
| CiAP | 4.10±0.01* | 6.17±0.02* | 1.43±0.02* | 2.44±0.05 | 3.69±0.01* | 1787±7 |
| CiBP | 4.10±0.01* | 5.82±0.06 | 0.72±0.02* | 2.49±0.04 | 2.80±0.02 | 1790±6 |
| CiFP | 2.82±0.07* | 6.17±0.06* | 1.78±0.06* | 2.36±0.03 | 3.01±0.02* | 1792±9 |
| CiGP | 2.84±0.02* | 5.03±0.03* | 1.36±0.09* | 2.56±0.03* | 3.38±0.04* | 1793±9 |
| CiHP | 2.84±0.01* | 6.05±0.14* | 1.12±0.07 | 2.53±0.04* | 2.99±0.01* | 1793±10 |
| PSB | *** | *** | *** | *** | *** | — |
| TCP | *** | *** | *** | *** | *** | *** |
| PSB * TCP | *** | *** | *** | — | *** | — |
Values represent the mean of three replicates±SE (standard errors).
Significant differences were assessed using a one-way ANOVA (Dunnett. Use Ci-Ctrl as the control category for CiA~CiH and CiP; use CiP for CiAP~CiHP).
Ci-Ctrl: control, Ci with P-free NBRIP added; CiA~CiH: PSB treatment, Ci with A~H suspension inoculation; CiP: TCP treatment, Ci with TCP supply and P-free NBRIP added; CiAP~CiHP: Combination treatment, Ci with A~H suspension inoculation and TCP supply.
PSB, TCP, and PSB×TCP: Two-way ANOVA for the factors of the PSB inoculation, TCP supply, and the interaction of PSB inoculation ×TCP supply.
*** P<0.001, ** P<0.01, * P<0.05, — P≥0.05.