Parallel trident – an efficient planting system for pear orchards
The Parallel Trident canopy was studied in a pear orchard planted on the Romanian plain on reddish preluvosol soil in early spring of 2008. Pear trees of four cultivars: 'Abate Fetel', 'Conference', 'Kaiser' and 'Williams' (control), in vitro propagated and self-rooted, were planted at 4.0 × 2.0 m. Trees were trained on two systems: vertically on 2 + 3 wires and on two planes at 30°, using 2 top wires and 3 bamboo tutors tree-1. Tree growth was evaluated using tree height, trunk cross sectional area, number and length of shoots tree-1 and typology of the fruit branches. 'Conference' had the highest trunk cross section area, being significantly more vigorous that 'Williams'. Total shoot length and fruit branches structure were significantly different between cultivars and control. 'Abate Fetel' produced the highest number of dards tree-1 (24.61) and the lowest number of spurs tree-1 (49) very significantly different than 'Williams'. 'Abate Fetel' recorded the highest cumulative yield, followed by 'Conference'. 'Kaiser' and 'Williams' had similar cumulative yield for the studied years. Tree productivity indexes were compared at the end of the each growing season by reporting both the number of fruits and the yield unit-1 of trunk cross-sectional area. 'Conference' had the smallest productivity indices, while 'Williams' showed the highest productivity. The Trident proved to be a suitable planting system, easy to manage, efficient and sustainable for the medium density pear orchards.
Stănică, F., Cean, I. and Peticilă, A.G. (2016). Parallel trident – an efficient planting system for pear orchards. Acta Hortic. 1130, 157-162
Pyrus communis, self-rooted, cultivars, canopy, growth, fruit shoots, productivity index