Table 4 The main effects of simulated acid rain spraying times, simulated eutrophication, or simulated acid rain (SAR) on Pontederia cordata

1862.03 ± 78.62^b

57.35 ± 1.42^d

395.71 ± 8.06^d

19.76 ± 1.23^c

11.51 ± 0.76^c

2496.96 ± 101.55^a

63.01 ± 0.77^c

1052.26 ± 42.14^c

35.79 ± 2.01^b

14.04 ± 0.93^b

1014.80 ± 74.63^d

72.81 ± 1.02^b

1637.37 ± 75.73^a

35.64 ± 1.71^b

17.08 ± 0.97^a

1411.77 ± 62.35^c

77.51 ± 0.84^a

1512.80 ± 65.77^b

54.48 ± 2.46^a

19.03 ± 0.80^a

1781.53 ± 107.88^a

68.22 ± 1.42^ab

1309.00 ± 135.17^a

25.51 ± 2.11^c

12.40 ± 0.76^c

1930.69 ± 129.74^a

66.29 ± 1.63^ab

1263.42 ± 92.18^a

36.43 ± 3.00^b

12.64 ± 0.74^c

1763.27 ± 128.20^a

70.66 ± 1.61^a

1105.88 ± 73.13^ab

38.50 ± 2.28^ab

15.90 ± 0.79^b

1310.06 ± 97.78^b

65.50 ± 1.96^b

919.84 ± 64.81^b

45.23 ± 2.73^a

20.72 ± 0.97^a

2026.03 ± 104.79^a

67.86 ± 1.26^ab

1274.07 ± 99.30^a

30.33 ± 2.46^b

11.63 ± 0.49^c

1617.74 ± 98.82^b

69.91 ± 1.34^a

1182.46 ± 84.78^ab

37.95 ± 2.38^a

15.11 ± 0.92^b

1445.39 ± 96.62^b

65.16 ± 1.68^b

992.08 ± 61.97^b

40.98 ± 2.19^a

19.51 ± 0.70^a