<p>Secondary re-sprouting capacities measured as a) number of sprouts and b) longest sprout of the four species after 40 days (means±SE). Different letters indicate Tukey’s HSD between the species (p<0.05). <i>S. humb.</i> – <i>Salix humboldtiana</i>, <i>Populus</i> – <i>Populus</i> spec., <i>S. bab.</i> hyb. – <i>Salix babylonica</i> hybrid, <i>S. x rub</i>. – <i>Salix x rubens</i>.</p