Table 2 Net photosynthesis rate (Pn), stomatal conductance (gs), transpiration (E), photosynthetic N use efficiency (PNUE), intercellular carbon dioxide concentration (Ci) in two cultivars with two-year-old seedlings of C. lanceolata as affected by water, soil and their interaction

NC

CK

NP

4.38 ± 0.44a

0.09 ± 0.03b

267.06 ± 20.67c

0.88 ± 0.11ab

4.52 ± 0.45a

NC

CK

CP

3.02 ± 0.45b

0.12 ± 0.01a

320.06 ± 7.39a

0.73 ± 0.09c

4.28 ± 0.62a

NC

MWC

NP

2.97 ± 0.29b

0.06 ± 0.01c

298.63 ± 5.61b

0.77 ± 0.10bc

2.97 ± 0.28 cd

NC

MWC

CP

1.80 ± 0.24f

0.05 ± 0.01d

330.50 ± 14.37a

0.58 ± 0.09d

2.18 ± 0.29e

NC

LWC

NP

2.25 ± 0.12de

0.03 ± 0.01e

165.32 ± 2.81f

0.34 ± 0.03e

2.70 ± 0.14 cd

NC

LWC

CP

1.69 ± 0.22f

0.02 ± 0.00f

265.73 ± 21.75c

0.17 ± 0.05f

2.24 ± 0.30e

SC

CK

NP

4.53 ± 0.74a

0.10 ± 0.02b

285.85 ± 27.63b

0.93 ± 0.05a

4.17 ± 0.68ab

SC

CK

CP

2.99 ± 0.40b

0.10 ± 0.03ab

327.32 ± 7.07a

0.85 ± 0.18a

3.09 ± 0.41c

SC

MWC

NP

2.50 ± 0.18 cd

0.06 ± 0.01c

294.12 ± 1.62b

0.54 ± 0.04d

2.63 ± 0.19d

SC

MWC

CP

2.80 ± 0.28bc

0.06 ± 0.01 cd

293.37 ± 2.94b

0.55 ± 0.04d

3.82 ± 0.38b

SC

LWC

NP

2.29 ± 0.35d

0.03 ± 0.00e

214.71 ± 14.39e

0.23 ± 0.05f

2.77 ± 0.41 cd

SC

LWC

CP

1.94 ± 0.10ef

0.03 ± 0.00ef

251.94 ± 22.11d

0.22 ± 0.06f

2.62 ± 0.14d

P:Fw

< 0.0001

< 0.0001

< 0.0001

< 0.0001

< 0.0001

P:Fc

0.0188

0.6076

0.2204

0.4886

0.46

P:Fs

< 0.001

0.4783

0.0019

< 0.0019

< 0.0001

P:Fw×Fc

0.2662

0.2611

< 0.0001

< 0.0001

< 0.0001

P:Fw×Fs

< 0.001

< 0.0001

< 0.0001

0.0010

< 0.0001

P:Fc×Fs

0.00098

0.94

< 0.0001

0.05

0.0022

P:Fw×Fc×Fs

< 0.001

0.0798

< 0.0001

< 0.0001

< 0.0001