Uspešnost obnove v vetrolomu poškodovanih sestojev v Savinjski dolini

Štravs, Janez (author), Diaci, Jurij (mentor)

Namen magistrskega dela je bil ugotoviti uspeh naravne in umetne obnove vetrolomnih površin po tehnični sanaciji na raziskovalnih objektih na Žovneku (pri Vranskem) in na Črnivcu, ki jih je veter prizadel leta 2007 in 2008. Raziskavo smo opravili na 30 vzorčnih ploskvah (10 × 10 m). Polovico smo jih postavili na površinah, ki so bile umetno obnovljene z gorskim javorjem, dobom in divjo češnjo, ter drugo polovico na površinah, ki so bile prepuščene naravni obnovi. Leta 2013 smo izvedli meritve sadik in dominantnih dreves naravnega mladja. Popisali smo tudi gostoto in zastiranje naravnega mladja ter zastiranje zelišč in grmovnic. Evidentirali smo 15 različnih drevesnih vrst. Gostota naravnega mladja na naravno in umetno obnovljenih površinah na Žovneku je bila okrog 3500 dreves ha-1 in na Črnivcu okrog 10.400 dreves ha-1. Delež klimaksnih vrst v gostoti dreves na Žovneku je bil okrog 20 % in na Črnivcu okrog 80 %. Sklepamo, da je na nizek delež klimaksnih vrst na Žovneku vplivala visoka pritalna vegetacija in njena vrstna sestava. Veliko površine je zastirala navadna robida in trava navadna šašulica, ki otežujejo pomlajevanje. Pri naravni obnovi na Žovneku je bila pritalna vegetacija visoka tudi 1,8 m, zaradi česar na velikem delu površin nismo našli naravnega mladja. Predlagamo, da se naravno mladje tam, kjer je prisotno, a zastrto, obžanje.

• Language: Slovenian
• Keywords: vetrolom, umetna obnova, saditev, naravna obnova
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [J. Štravs]
• Year: 2019
• PID: 20.500.12556/RUL-111052
• UDC: 630*23:630*42(497.4Žovnek)(497.4Črnivec)(043.2)=163.6
• COBISS.SI-ID: 5511078
• Publication date in RUL: 22.09.2019

Secondary language

• Language: English
• Title: Success of regeneration in stands damaged by windthrow in Savinjska valley

Abstract

The purpose of this master’s thesis was to evaluate the effectiveness of natural regeneration and planting on windthrow forest area from 2007 and 2008 following salvage logging on research objects in Žovnek (near Vransko) and Črnivec. The research has been carried out on 30 sample plots (10 × 10 m). Half of them were placed on the areas of artificial remediation with sycamore maple (Acer pseudoplatanus L.), common oak (Quercus robur L.) and cherry (Prunus avium L.) trees, the other half on the areas that were left to natural regeneration. In 2013 we carried out the measurements of characteristics of dominant natural seedlings and plants. We also recorded the density and coverage of natural seedlings together with the coverage of herbs and shrubs. We registered 15 different tree species. The density of spontaneously developed seedlings on areas of natural regeneration and artificial regeneration on Žovnek was approximately 3500 trees ha-1 and on Črnivec approximately 10.400 ha-1. The percentage of climax species according to the density of the trees on Žovnek was approximately 20 % and on Črnivec approximately 80 %. We believe that low percentage of climax species on Žovnek was due to tall and dense ground vegetation and its species composition. A lot of area was covered by bramble (Rubus fruticosus) and wood small-reed (Calamagrostis epigejos), which made regeneration more difficult. In natural regeneration on Žovnek the ground vegetation was up to 1.8 m high. This may be the primary reason for many plots without any tree regeneration. We propose that natural regeneration is freed from competition by mowing.

• Keywords: windthrow, artificial regeneration, planting, natural regeneration