Effects of 3 Trunk Support Systems on Growth of Young Pyrus Calleryana Trees

Abstract

Trunk support of newly planted Pyrus calhryana saplings (from 57-L [15-gal] containers, 280 cm [9 ft] tall) for 2 years with 2 stakes was compared with the TreeSaver™ Tree Anchoring System (3 rubber support straps anchoring each tree) and with a prototype of Bio-Tie (single-stake system holding each tree in an upright position with a flexible cord allowing for multidirectional movement of each tree). During the first year after installation, the double-staked trees grew taller than those supported with Tree Saver or Bio-Tie systems (P < 0.05). After the trunk supports were removed and the trees were allowed to sway normally in the third year, the differences in growth increase disappeared. The Bio-Tie-supported tree trunks developed significantly more taper than either Tree Saver or the 2 stakes and remained more tapered after the stem supports were removed.