diplomsko delo - univerzitetni študij - 1. stopnja
Matej Jerele (Author), Jurij Diaci (Mentor)

Abstract

V raziskavi smo primerjali uspeh naravne in umetne obnove vetrolomne površine na pobočju južno od Črnivca. Vetrolomna površina leži v montanskem pasu, kjer je zaradi počasnejše naravne obnove ogrožena stabilnost pobočja ter upočasnjena obnova prvotnih funkcij gozda. Raziskovalno območje je obsegalo 10 parov ploskev, na katerih smo primerjali rastne spremenljivke sadik in dominantnih osebkov naravne obnove. Na posebej postavljenih vegetacijskih ploskvicah smo analizirali pokrovnost vaskularnih rastlin ter pokrovnost in gostoto drevesnega pomladka. Ugotovili smo negativne povezave med pokrovnostjo vrst Rubus sp. in številom osebkov drevesnih vrst. Sadike navadne smreke so v primerjavi z dominantnimi osebki te vrste dosegale 43,6 cm višjo povprečno višino ter 9,2 mm večji premer koreninskih vratov. Hkrati so bile sadike smreke bolj sproščene kot dominantni osebki. Sadike gorskega javorja so dosegale 90,9 cm višjo povprečno višino ter 6,9 mm večji premer koreninskih vratov. Prav tako so bile sadike gorskega javorja bolj sproščene kot dominantni osebki te vrste. Najbolj objedene so bile sadike gorskega javorja, najverjetneje zaradi prenizke ali poležane zaščitne mreže proti objedanju. Osebki smreke, gorskega javorja, bukve ter navadne jelke naravne obnove so kazali boljšo vitalnost in manj poškodb zaradi objedanja. Uspešnost naravne obnove je posredno potrdila analiza lesnatih rastlin vegetacijskih ploskvic, kjer so bile drevesne vrste zastopane z gostoto 16.500 os./ha ter povprečno zastornostjo 2,9 %. Med temi so bile pionirske vrste s 3,8 % zastiranjem bolj uveljavljene kot pozno sukcesijske vrste z 2,1 % zastiranjem. Umetna obnova se v primeru močne erozijske dinamike, počasnejše naravne obnove ter bujne konkurirajoče vegetacije izkaže za kvalitetno dopolnilo naravni obnovi. Z odločitvijo za umetno obnovo moramo za zadovoljive rastne rezultate upoštevati večje stroške zaradi varovanja pred objedanjem ter obžetve.

Keywords

naravna obnova;umetna obnova;vetrolom;Črnivec;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Jerele]
UDC: 630*2:630*4(497.4Črnivec)(043.2)=163.6
COBISS: 4006310 Link will open in a new window
Views: 432
Downloads: 131
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Natural and artificial forest regeneration comparison after 2008 windstorm in Nazarje area
Secondary abstract: This thesis compares the success of natural and artificial forest regeneration on a windstorm area south of Črnivec pass. The windstorm area lies in the montane zone, where natural regeneration with restoration of forest functions are slower and hillside stability is lower. The study site comprised 10 pairs of experimental plots, where growth variables of planted seedling and natural dominant trees were compared. Vascular plant and tree cover degree as well as tree density were assessed on special vegetation plots. A negative correlation between density of 8 present tree species and Rubus sp. cover degree was confirmed. Planted Picea abies saplings reached 43.6 cm greater average height growth and 9.2 mm greater average root collar diameter (RCD) in comparison with P. abies dominant trees. Planted Acer pseudoplatanus saplings reached 90.9 cm greater average height growth and 6.9 mm greater average RCD in comparison with A. pseudoplatanus dominant trees. Both P. abies and A. pseudoplatanus planted saplings reached higher Free-to-Grow values as dominant trees of corresponding species. A. pseudoplatanus planted saplings have shown the greatest herbivore browsing damage. P. abies, A. pseudoplatanus, Fagus sylvatica and Abies alba dominant trees have shown greater vitality and less browsing damage than planted saplings. Natural regeneration success was indirectly supported with results from vegetation plot analysis, where tree density reached 16,500 trees per ha with mean cover degree of 2.9%. On vegetation plots pioneer tree species were better established than late successional tree species with mean cover degree of 3.8% and 2.1%, respectively. Artificial regeneration is a beneficial supplement to natural regeneration in case of strong erosion dynamics, slow natural regeneration and dense competing vegetation. For achieving adequate growth results with artificial regeneration, greater costs for browsing protection and weeding must be taken into account.
Secondary keywords: natural regeneration;artificial regeneration;comparison;windstorm;Črnivec;
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire
Pages: XI f., 63 str., [2] f. pril.
ID: 11534096