Table 2 Values of stomatal parameters for different nitrogen addition treatments in Manchurian ash and Mongolian oak. All data were means ± SE (n = 64).

CK

7.01 ± 0.70^b

3.04 ± 0.97^ab

17.57 ± 1.72^b

6.32 ± 0.45^b

6.36 ± 0.52^a

2.47 ± 0.58^b

12.78 ± 1.15^b

9.48 ± 0.45^b

LN

7.26 ± 0.14^ab

3.18 ± 0.27^a

18.10 ± 1.43^ab

8.28 ± 0.94^a

6.53 ± 0.19^a

2.54 ± 0.35^b

13.06 ± 2.20^b

11.89 ± 0.69^a

MN

7.66 ± 0.19^a

3.28 ± 0.27^a

19.74 ± 2.11^a

8.43 ± 1.14^a

6.71 ± 0.30^a

3.13 ± 0.12^a

16.52 ± 1.42^a

11.14 ± 0.26^a

HN

7.35 ± 0.05^ab

2.73 ± 0.13^b

15.74 ± 0.68^b

9.93 ± 0.90^a

6.25 ± 0.29^a

2.40 ± 0.19^b

11.81 ± 1.51^b

9.63 ± 0.69^b