Establecimiento de cuatro especies de Quercus en el sur de la ...

Reforestation with Quercus ilex L. and Q. suber L. by direct seeding and planting in southern Spain
conductance values (6 ± 0.5 mmol m –2 s –1 ) and 1‐year‐old Q. suber seedlings the
highest (90 ± 29 mmol m –2 s –1 ), the differences being significant —the conductance of
3‐year‐old Q. suber seedlings was significantly lower than those for the other
treatments (F = 10.97, P = 0.003). There were also substantial differences between
individual specimens of the same species (Fig. 4).
Leaf water content rate varied little with time (results not shown). The mean
water content was highest for direct‐seeded Q. suber plants (56.6 ± 9.5) and lowest for
3‐year‐old Q. ilex seedlings (47.6 ± 5.7); the differences, however, were not statistically
significant.
a
Stomatal conductance (mmol m -2 s -1 )
300
250
200
150
100
50
Q. ilex
_______ Direct seeded
............. 1 year seedling
------ 3 year seedling
b
Stomatal conductance (mmol m -2 s -1 )
0
300
250
200
150
100
50
0
162 181 197 206 231
Julian day
Q. suber _______ Direct seeded
............. 1 year seedling
------ 3 year seedling
162 181 197 206 231
Julian day
b
a
a
Figure 4. Stomatal conductance of Q. ilex (a) and Q. suber (b) at midday during the dry season. Bars
represent standard errors and different letters statistically different groups according to the post‐hoc
Tukey test (P < 0.05) on a given date.
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