Treatment | PI | Pn | Chlorophyll content (SPAD) | Stomatal conductance | ||||
---|---|---|---|---|---|---|---|---|
English oak | y = a + bT + cT2 | r2 | y = a + bT + ct2 | r2 | y = a + bT + cT2 | r2 | y = a + bT + cT2 | |
Control | y = 4.80 + 0.10 + 0.00 | 0.96 | y = 5.57−0.34 + 0.08 | 0.93 | y = 48.11 + 2.70−0.46 | 0.95 | y = 0.55−0.04 + 0.01 | 0.98 |
Tapwater | y = 0.75 + 0.41 + 0.03 | 0.89 | y = 1.11 + 0.26 + 0.04 | 0.78 | y = 27.16 + 2.38−0.08 | 0.81 | y = 0.16 + 0.01 + 0.00 | 0.96 |
7.25 g (0.25 oz) N | y = 0.73 + 0.52 + 0.03 | 0.89 | y = 1.24 + 0.27 + 0.06 | 0.81 | y = 26.76 + 3.78−0.20 | 0.78 | y = 0.16 + 0.05−0.00 | 0.98 |
14.5 g (0.51 oz) N | y = 1.01 + 1.82−0.19 | 0.85 | y = 1.26 + 0.58 + 0.03 | 0.77 | y = 26.82 + 4.01−0.08 | 0.88 | y = 0.15 + 0.11−0.01 | 0.91 |
29 g (1.02 oz) N | y = 0.95 + 1.70−0.14 | 0.90 | y = 1.08 + 1.81−0.16 | 0.76 | y = 27.73 + 2.78 + 0.18 | 0.91 | y = 0.17 + 0.06 + 0.00 | 0.90 |
European beech | ||||||||
Control | y = 4.33 + 0.02 + 0.01 | 0.95 | y = 5.69−0.08 + 0.00 | 0.90 | y = 49.66 + 1.83−0.28 | 0.92 | y = 0.53 + 0.02−0.00 | 0.93 |
Tapwater | y = 0.79 + 0.30 + 0.04 | 0.82 | y = 1.28 + 0.14 + 0.06 | 0.81 | y = 18.50 + 1.50 + 0.51 | 0.76 | y = 0.13 + 0.04 + 0.00 | 0.84 |
7.25 g (0.25 oz) N | y = 0.79 + 0.82−0.04 | 0.88 | y = 1.35 + 0.67−0.03 | 0.80 | y = 18.52 + 2.75 + 0.38 | 0.81 | y = 0.15 + 0.04−0.01 | 0.87 |
14.5 g (0.51 oz) N | y = 0.85 + 1.93−0.19 | 0.78 | y = 1.27 + 1.33−0.11 | 0.69 | y = 17.35 + 3.93 + 0.44 | 0.65 | y = 0.12 + 0.07 + 0.01 | 0.80 |
29 g (1.02 oz) N | y = 0.79 + 1.74−0.16 | 0.75 | y = 1.11 + 1.88−0.18 | 0.71 | y = 18.25 + 6.13 + 0.19 | 0.81 | y = 0.13 + 0.07 + 0.01 | 0.79 |
PI and leaf chlorophyll content, values mean of mean of ten trees, five leaves per tree. Pn and stomatal conductance mean of ten trees, two leaves per tree.
Regression: y, leaf PI, Pn, chlorophyll content, and stomatal conductance; a, leaf PI, Pn, chlorophyll content, and stomatal conductance (estimated calculated intercept); b, rate of leaf PI, Pn, chlorophyll content, and stomatal conductance with time (T); c, = rate of change of leaf PI, Pn, chlorophyll content, and stomatal conductance.