Main effects | Index | |||||||
---|---|---|---|---|---|---|---|---|
RGR (%) | Root activity (μg·g−1·h−1) | Chl T (mg·g−1) | SOD (U·g−1) | CAT (U·g−1·min−1) | REC (%) | MDA (nmol·g−1) | ||
Simulated acid rain spraying times | 1 | – | – | 1862.03 ± 78.62b | 57.35 ± 1.42d | 395.71 ± 8.06d | 19.76 ± 1.23c | 11.51 ± 0.76c |
2 | – | – | 2496.96 ± 101.55a | 63.01 ± 0.77c | 1052.26 ± 42.14c | 35.79 ± 2.01b | 14.04 ± 0.93b | |
3 | – | – | 1014.80 ± 74.63d | 72.81 ± 1.02b | 1637.37 ± 75.73a | 35.64 ± 1.71b | 17.08 ± 0.97a | |
4 | – | – | 1411.77 ± 62.35c | 77.51 ± 0.84a | 1512.80 ± 65.77b | 54.48 ± 2.46a | 19.03 ± 0.80a | |
Simulated eutrophication | E0 | 8.35 ± 5.75a | 14.44 ± 3.66d | 1781.53 ± 107.88a | 68.22 ± 1.42ab | 1309.00 ± 135.17a | 25.51 ± 2.11c | 12.40 ± 0.76c |
E1 | 0.41 ± 5.12a | 17.77 ± 1.68b | 1930.69 ± 129.74a | 66.29 ± 1.63ab | 1263.42 ± 92.18a | 36.43 ± 3.00b | 12.64 ± 0.74c | |
E2 | − 17.82 ± 3.29b | 16.45 ± 3.20c | 1763.27 ± 128.20a | 70.66 ± 1.61a | 1105.88 ± 73.13ab | 38.50 ± 2.28ab | 15.90 ± 0.79b | |
E3 | − 20.42 ± 2.84b | 19.72 ± 1.04a | 1310.06 ± 97.78b | 65.50 ± 1.96b | 919.84 ± 64.81b | 45.23 ± 2.73a | 20.72 ± 0.97a | |
SAR | pH 7.0 | 0.21 ± 4.96a | 19.14 ± 1.24a | 2026.03 ± 104.79a | 67.86 ± 1.26ab | 1274.07 ± 99.30a | 30.33 ± 2.46b | 11.63 ± 0.49c |
pH 5.0 | − 4.22 ± 5.16a | 17.06 ± 1.81b | 1617.74 ± 98.82b | 69.91 ± 1.34a | 1182.46 ± 84.78ab | 37.95 ± 2.38a | 15.11 ± 0.92b | |
pH 4.0 | − 18.10 ± 3.84b | 15.09 ± 4.29c | 1445.39 ± 96.62b | 65.16 ± 1.68b | 992.08 ± 61.97b | 40.98 ± 2.19a | 19.51 ± 0.70a |