Debelinski prirastek dreves v urbanem okolju : diplomsko delo

Rupnik, Branko (author), Oven, Primož (mentor), Čufar, Katarina (reviewer)

Pri 76 prizadetih in 5 zdravih ostrolistnih javorjih (Acer platanoides), ki so rasli ob Vojkovi cesti v Ljubljani (Slovenija), smo izmerili širino branik in analizirali debelinsko rast dreves. Prizadeta drevesa smo na osnovi širin branik razdelili v 5 skupin. Skupina zdravih dreves je imela v primerjavi z ostalimi skupinami skoraj enkrat večji povprečni prirastek in sicer kar 4,76 mm na braniko. Pri prvi skupini prizadetih dreves je bil povprečni prirastek 3,76 mm na braniko, pri tretji 3,18 mm, pri sedmi 2,63 mm, pri dvanajsti 3,02 mm in sedemnajsti skupina 2,11 mm na braniko. Zadnje branike prizadetih dreves so imele samo nekaj celic, debele pa so bile od 20-50 mm. Pri večini preiskanih dreves je bil lesni prirastek na 2 nasprotnih polmerih različen. Najverjetnejši vzrok propada dreves je prekomerno soljenje cestišč v zimskem času. Analiza rasti dreves s pomočjo Gompertzove rastne funkcije je pokazala, da je imela večina preiskanih dreves višek rasti med 9-11 letom starosti, ne glede na končno življenjsko dobo dreves. Ostrolistne javorje (Acer platanoides) v Ljubljani bi lahko ohranili z bistveno zmanjšano uporabo soli, oziroma z opustitvijo posipavanja cestišč s soljo.

• Language: Slovenian
• Keywords: mestna drevesa, lesni prirastek, ostrolistni javor, rastna funkcija
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [B. Rupnik]
• Year: 2007
• Number of pages: X, 35 f.
• PID: 20.500.12556/RUL-243
• UDC: 630*56
• COBISS.SI-ID: 1565577
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Increment in thickness in trees from urban environment : visokošolski strokovni študij

Abstract

In 76 affected and 5 healthy Norway maples (Acer platanoides) growing at Vojkova road in Ljubljana (Slovenia), the growth rings were measured and the growth of trees in thickness analyzed. Based on thickness of growth rings the affected trees were sorted in 5 groups. The group of healthy trees on average has almost 2 times thicker increment (4.76mm) than the affected ones. In 1st group of the affected trees the average thickness of growth rings in17th. Lastgrowth rings of affected trees contained only few cells and were only 20 -50ìm thick. Wood increment was different on opposed radii at majority of investigated trees. Most possible cause for dieback of trees was application of de-icing salts during winter. Analysis of growth by Gompertz function showed that maximum of growth occurred at age 9 - 11 in majority of trees, irrespective of their life duration. Trees in Ljubljana could be preserved if application of de-icing salts would be abandoned or their amount essentially reduced.

• Keywords: city trees, wood increment, Norway maple, growth function