Research on Rooting of Selected Tilia Spp.

Magherini, R.; Nin, Stefania

doi:10.17660/actahortic.1993.331.34

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“…According to the topophysis effect, basal cuttings, i.e., suckers from the basal part of the trunk, were expected to be easier to root (Roulund, 1973;Osterc et al, 2016). This fact was also described for four Tilia species, among them the parental species of T. × vulgaris, T. cordata and T. platyphyllos (Magherini and Nin, 1993), with better rooting success in suckers than shoot cuttings. The frequent pruning of the alley trees may have resulted in rejuvenation of the cuttings that were sampled in the crown positions.…”

Section: Discussionmentioning

confidence: 85%

Propagation of 285-year-old alley linden (Tilia × vulgaris) trees via long cuttings

Winkelmann¹,

Spethmann²,

Seegert³

2020

Europ.J.Hortic.Sci

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Original article four rows of mature lindens is a major feature of the Berggarten (Figure 1A). The numerous pruning events left large cutting wounds on the main branches, which created various structural problems on the inside of the trees, such as wood rot, bark cracks, necrotic tissue, and very small residual wall thickness. In the 1990s, a number of discussions about traffic and work safety in the alley took place within the garden management. These discussions led to a major crown reduction in 1994 during which each tree was trimmed by 10 to 20 m to a final crown height of 6 m. From then on, new growth was cut back and thinned out every 3 to 4 years to reduce the risks of breakage. Despite these efforts, the danger of wood rot increased such that the main branches of 55 linden trees were cut back drastically in 2008. Between 2009 and 2012, 33 trees of the 171 existing original lindens were removed completely after internal and external inspections and analyses due to traffic safety concerns. Of the remaining trees, 15 were cut back almost completely to their trunk. In 2009, in an assessment of the vitality of the linden alley of the Berggarten, a complete replanting after growing suitable replacement trees was recommended (Balder, 2009). In the decision-making process, the interests of historical preservation, traffic and work safety, and visitor experience and satisfaction had to be considered. An expert colloquium held in 2012 at Herrenhausen revealed different viewpoints within the historical preservation community. Some were of the opinion that each tree should be preserved as a living testimony until its natural death. Others preferred a complete replanting of a homogeneous alley to recreate the original

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Section: Discussionmentioning

confidence: 85%