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Published in Scientific Papers. Series B. Horticulture., Vol. LVII
Written by Iuliu CEAN, Florin STĂNICĂ

New orchards are heading to increase the planting density per hectare or to create an increased number of productive structures (scaffolds, axes, etc.) per surface unit. One way to accomplish the second task is to divide the growth vigor over more branches. This goal can be achieved by new tree training systems asthree-axis shape called “Trident” “Candelabro”, “Chandelier” or “Candlestick”. A replicated trial was established in the orchard of the University of Agronomic Sciences and Veterinary Medicine of Bucharest to evaluate the behavior of some self-rooted pear cultivars on “Trident” training system. The orchard spacing was 4 X 2.0 m and studied varieties were Abbé Fétel, Conference, Clapp’s Favorite, Max Red Bartlett, Beurré Bosc and Alexander Lucas. The trunk diameter, total annual shoot length and shoot number, tree height and other growth parameters were measured annually at the beginning of growing season. The obtained results indicate differences between varieties. The greatest values for height tree were registered in Abbé Fétel variety in both season and the lowest values for Clapp’s Favorite variety in 2011 and Max Red Bartlett variety in 2012.The data referring to trunk cross section pointed out very significant positive differences at Abbé Fétel and significant positive differences in case of “Conference” variety from average used as control in 2011. In 2012, two varieties showed significant positive differences from the average experience, respectively Conference and Max Red Bartlett.In 2011 varieties Conference, Abbé Fétel and Max Red Bartlett produced more long shoots than the average of trial and in 2012 the varieties mentioned above and Beurré Bosc” formed long shoots more thanthe average.

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