Analiza uspešnosti obnove gozdnih sestojev, poškodovanih v žledolomu leta 2014 v okolici Idrije
| Autor: | Grahelj, Primož |
|---|---|
| Přispěvatelé: | Roženbergar, Dušan |
| Jazyk: | slovinština |
| Rok vydání: | 2021 |
| Předmět: |
žledolom
forest regeneration obnova gozda Restoration ostanki sestoja Idrija Sanacija remnant trees ice storm |
| Popis: | V tej nalogi so analizirali uspešnost pomlajevanja sestojev po februarskem žledolomu leta 2014 v okolici Idrije. Ugotavljali so, ali je smiselno puščati ostanke sestojev, ter vlogo sanacije po motnji. Na terenu so postavili 40 ploskev, velikosti 25 m2, od tega po 10 na saniranih in nesaniranih površinah, ter po 10 na povsem odprtih površinah sredi vrzeli in pod zastorom dreves. Na ploskvah so izmerili nekaj osnovnih ekoloških parametrov, temeljnico, dolžino in prirastke dominantnih osebkov, preučili zeliščno plast, prešteli mladje po drevesnih vrstah, višinskih razredih in poškodovanosti ter popisali panje oziroma podrta drevesa. Ugotovili so, da je na saniranih površinah ter tistih delno pod zastorom v povprečju večje število osebkov mladja ter nekoliko večji delež površine zastrte z mladjem, po drugi strani pa so na povsem odprtih površinah precej večji višinski prirastki ter večji delež zelišč, kar lahko ovira pomlajevanje. Večina osebkov mladja je bilo nepoškodovanih oziroma so bile poškodbe zaradi objedanja minimalne. Na podlagi rezultatov so prišli do zaključka, da je sanacija površin smiselna, saj prispeva k večjemu številu mladja, poleg tega pa je smiselno puščanje ostankov v vrzelih, v kolikor drevesa niso preveč poškodovana, saj so pokazali, da nekaj zastora v vrzelih pomeni manjšo zastrtost z zelišči in več mladja. Regeneration success was analyzed in stands damaged by the 2014 ice storm near Idrija. It was determined, whether it makes sense to leave remnant trees in the stands and the role of restoration after the disturbance. 40 plots of 25 m2 were placed in the field, of which were 10 on restored and unrestored surface, 10 in a gap, where there were no trees, and 10 under the canopy of some trees. Some basic ecological and woody regeneration parameters like basal area, height and height increments of dominant trees and ground vegetation layer coverage were measured on the plots. All the seedlings and saplings were counted, defined their tree species, height classes and damage, listed tree stumps and felled trees. It was found that on restored areas, and those partially under the canopy, on average a larger number of saplings and a slightly larger proportion of the area covered with regeneration, on the other hand, on completely opened areas there were much higher height increments and higher proportion of ground vegetation, which can hinder rejuvenation. Most of the saplings were not browsed or the injuries were minimal. Based on the results, the conclusion was that restoration makes sense, as it contributes to a greater density of regeneration. In addition, it makes sense to leave remnant trees in the gaps, as long as the trees are not too damaged, as it was shown that some canopy in the gaps means less ground vegetation coverage and more regeneration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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