Research Article
Soil Phosphorus Forms and Profile Distributions in the Tidal River Network Region in the Yellow River Delta Estuary
Table 1
General characteristics of the soils in the tidal river network region.
| | Soil | Depth
(cm) | pH | SM (%) | Salinity (%) | TOC (%) | Ca (%) | Al (%) | Fe (%) |
| | BRB | 0–10 | 8.9 (0.08) | 21.4 (1.40) | 2.2 (1.22) | 0.6 (0.25) | 4.5 (0.86) | 6.2 (0.70) | 3.2 (0.52) | | 10–20 | 9.1 (0.05) | 21.1 (0.19) | 0.7 (0.22) | 0.5 (0.13) | 4.3 (0.31) | 6.3 (0.33) | 2.8 (0.22) | | 20–30 | 9.1 (0.12) | 21.9 (0.40) | 0.7 (0.37) | 0.4 (0.11) | 4.1 (0.06) | 6.0 (0.10) | 2.6 (0.08) | | 30–40 | 9.2 (0.07) | 22.6 (0.36) | 0.5 (0.24) | 0.3 (0.05) | 4.0 (0.05) | 5.8 (0.14) | 2.5 (0.10) | | 40–50 | 9.1 (0.10) | 23.9 (0.49) | 0.5 (0.07) | 0.3 (0.06) | 3.8 (0.38) | 5.7 (0.32) | 2.4 (0.09) | | 50–60 | 9.2 (0.07) | 24.5 (0.45) | 0.4 (0.03) | 0.3 (0.09) | 3.7 (0.39) | 5.6 (0.35) | 2.5 (0.05) |
| | RB | 0–10 | 8.8 (0.28) | 21.0 (1.83) | 4.4 (4.32) | 1.2 (0.18) | 4.9 (0.50) | 6.7 (0.46) | 3.2 (0.46) | | 10–20 | 8.8 (0.32) | 20.7 (0.71) | 4.7 (4.65) | 0.7 (0.51) | 4.7 (1.26) | 6.5 (0.95) | 3.0 (0.95) | | 20–30 | 8.7 (0.24) | 21.3 (0.83) | 4.9 (3.92) | 0.7 (0.19) | 4.4 (0.53) | 6.3 (0.36) | 2.8 (0.42) | | 30–40 | 8.8 (0.17) | 21.9 (0.86) | 3.9 (2.48) | 0.4 (0.13) | 4.2 (0.13) | 6.0 (0.19) | 2.6 (0.15) | | 40–50 | 8.8 (0.14) | 22.2 (0.70) | 4.9 (2.51) | 0.9 (0.66) | 5.2 (1.54) | 6.8 (0.94) | 3.2 (0.82) | | 50–60 | 8.9 (0.10) | 22.3 (0.28) | 4.4 (2.39) | 0.7 (0.26) | 5.3 (1.48) | 6.8 (0.90) | 3.2 (0.79) |
| | TB | 0–10 | 8.7 (0.05) | 21.3 (1.19) | 20.3 (1.12) | 1.3 (0.11) | 5.4 (0.20) | 6.8 (0.24) | 3.5 (0.06) | | 10–20 | 8.9 (0.13) | 21.7 (0.88) | 9.6 (0.81) | 1.0 (0.36) | 5.6 (0.51) | 6.9 (0.20) | 3.7 (0.57) | | 20–30 | 8.8 (0.06) | 22.4 (0.96) | 9.1 (0.17) | 0.7 (0.12) | 4.9 (0.49) | 6.4 (0.31) | 3.1 (0.45) | | 30–40 | 8.8 (0.10) | 23.0 (0.79) | 9.4 (2.72) | 0.7 (0.12) | 4.9 (0.55) | 6.5 (0.61) | 3.2 (0.40) | | 40–50 | 8.9 (0.16) | 23.3 (0.58) | 8.8 (2.14) | 0.8 (0.32) | 5.4 (0.74) | 6.9 (0.55) | 3.4 (0.57) | | 50–60 | 8.9 (0.08) | 24.4 (0.38) | 7.9 (0.59) | 0.9 (0.53) | 5.0 (0.22) | 6.6 (0.14) | 3.2 (0.12) |
| | TCB | 0–10 | 8.7 (0.04) | 20.9 (0.16) | 22.2 (1.41) | 1.0 (0.19) | 6.1 (0.50) | 7.5 (0.21) | 3.1 (1.23) | | 10–20 | 8.8 (0.10) | 21.5 (0.56) | 11.7 (1.50) | 1.2 (0.13) | 6.2 (0.41) | 7.6 (0.29) | 4.1 (0.36) | | 20–30 | 8.9 (0.03) | 22.2 (0.74) | 9.5 (0.98) | 1.1 (0.39) | 5.6 (0.74) | 7.2 (0.64) | 3.6 (0.54) | | 30–40 | 8.8 (0.10) | 24.0 (0.32) | 14.7 (5.90) | 0.9 (0.23) | 5.9 (0.56) | 7.4 (0.53) | 3.9 (0.36) | | 40–50 | 8.9 (0.12) | 24.6 (0.47) | 9.6 (1.01) | 0.9 (0.17) | 5.6 (0.51) | 7.2 (0.53) | 3.6 (0.45) | | 50–60 | 8.8 (0.06) | 25.1 (0.63) | 10.0 (1.95) | 0.8 (0.22) | 5.5 (0.92) | 7.2 (0.78) | 3.6 (0.66) |
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