Radovi, Vol. 41 No. 1/2, 2006.
Prethodno priopćenje
Harmful lignicolous fungi on pedunculate oak (Quercus robur L.)
M. Županič
D. Matošević
B. Liović
Sažetak
Research aimed at drawing up a list of harmful lignicolous fungi on pedunculate oak (Quercus robur L.) was conducted in typical sites of pedunculate oak situated in the lowland forests of Pokupsko Basin and Lonjsko Polje. Lignicolous fungi, the most common causes of wood decay, inflict damage on standing trees and the produced wood assortments. Wood decay is related to stand age; consequently, it occurs more in older stands than in younger ones. In terms of resistance to decay, pedunculate oak belongs to medium resistant species. Heartwood formation substances (tannin) put up passive resistance to fungal attacks. As a result, the fungi spread very slowly and the decay progresses at a slow pace while the heartwood in the fallen tree is durable. In a fallen tree, the first to rot is the sapwood because it has lost the ability of active resistance and has favourable humidity. Fungi that attack standing trees are wound parasites that cause heartrot in the stem, the stem base or the root. The loss of technical value and a disturbed mechanical stability in the invaded trees make them vulnerable to breaks. After the fall or the death of the host, these fungi continue to live saprophytically on the remains, where they develop fruiting bodies. However, they never invade dead fallen trees. Fungi attacking the produced assortments are saprophytic organisms that predominantly colonise fallen branches and slash, but may also inflict damage on technical timber in favourable conditions. A total of 11 fungi species that attack standing trees and 8 species that attack the produced assortments were recorded.
Ključne riječi
lignicolour fungi; pedunculate oak; standing trees; felled trees
Hrčak ID:
16913
URI
Datum izdavanja:
23.12.2006.
Posjeta: 2.770 *