Table 1.
Major soil physicochemical characteristics of the experimental site were measured before the experiment.
| Years | Soil depth (cm) | Bulk density (g cm−3) | Organic matter (g kg−1) | Total C (g kg−1) | Total N (g kg−1) | NO3− −N (mg kg−1) | NH4+ −N (mg kg−1) | Avail. P (mg kg−1) | Avail. K (mg kg−1) |
|---|---|---|---|---|---|---|---|---|---|
| 2015 | 0–30 | 1.20 | 12.63 | 11.10 | 0.71 | 9.83 | 2.80 | 38.7 | 144.6 |
| 30–60 | 1.27 | 9.88 | 12.70 | 0.45 | 4.26 | 2.70 | 19.8 | 123.3 | |
| 60–80 | 1.32 | 5.49 | 10.00 | 0.39 | 3.18 | 2.00 | 16.6 | 114.5 | |
| 2016 | 0–30 | 1.25 | 13.20 | 10.40 | 0.66 | 7.80 | 2.60 | 41.3 | 131.2 |
| 30–60 | 1.29 | 8.64 | 9.60 | 0.51 | 4.95 | 2.70 | 25.8 | 107.1 | |
| 60–80 | 1.30 | 6.21 | 11.30 | 0.50 | 3.40 | 2.10 | 16.0 | 118.5 |