Pomlajevanje hrasta na Krasu na območju večkratnih sečenj pod daljnovodom 400kV Divača-Sredipolje

diplomsko delo - univerzitetni študij - 1.stopnja

Nataša Buser (Author), Jurij Diaci (Mentor), Dušan Roženbergar (Co-mentor)

Abstract

Cilj diplomske naloge je bil preučiti različne ekološke dejavnike, ki vplivajo na pomlajevanje hrastov na Krasu. Izbrani so bili trije odseki z večkratnimi sečnjami na območju presek daljnovoda Divača- Redipuglia. Skupaj je bilo v treh različnih odsekih postavljenih 120 vzorčnih ploskev (4 m x 4 m), ki so bile razdeljene v tri stratume (sredina preseke, rob in sestoj črnega bora). Odseki so bili izbrani glede na čas zadnjega ukrepanja. Razlik v ekoloških razmerah med njimi ni bilo, razlike so bile med stratumi. Deleži zastiranja zeliščne, grmovne in drevesne plasti so se razlikovali med stratumi in odseki. Zastiranje zeliščne plasti je bilo največje na sredini preseke. Popisanih je bilo 12 grmovnih vrst, najpogostejši so bili ruj, kalina in robida. Zastiranje grmovnic je bilo najvišje na sredini preseke. Med drevesnimi vrstami so bili najštevilčnejši mali jesen, hrast in črni gaber; skupno je bilo popisanih 12 vrst. Delež zastiranja grmovne in zeliščne plasti je negativno vplival na gostoto drevesnih vrst. Število in zastiranje glavnih drevesnih vrst sta bila najvišja na odseku z najstarejšim ukrepanjem. Višine dominantnih osebkov so se značilno razlikovale med odseki. Relativni dolžinski prirastki so bili najvišji na sredinskem stratumu, lanski relativni dolžinski prirastek je bil v povprečju večji. Najbolje je priraščal mali jesen. Višinska struktura je pokazala največje število hrasta in malega jesenav razredu do 50 cm in črnega gabra do 300 cm. Odprtost v sestoju je bila20%. Največ zaradi objedanja poškodovanih osebkov hrasta in črnega gabra smo zabeležili v sestoju. Mali jesen je bil najbolj poškodovan na sredini preseke. Ugotovili smo, da sta za nasemenitev hrasta najbolj ugodna sestoj in rob, preraščanje pa je omogočeno le na sedini preseke.

Keywords

pomlajevanje;hrast;Kras;večkratne sečnje;daljnovod;

Data

Language:	Slovenian
Year of publishing:	2013
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[N. Buser]
UDC:	630*2
COBISS:	3717030
Views:	356
Downloads:	89
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Regeneration of oak in Karst region on the section with multiple harvesting treatments under transmission line 400kV Divača-Sredipolje
Secondary abstract:	The aim of the survey was to examine various environmental factors that affect the rejuvenation of oak in the Karst region. Three sections with multiple harvesting treatments under transmission line Divača-Redipuglia were selected. In total 120 sample plots (4 m x 4 m) were placed. The plots were divided into three strata (middle open section, edge and under canopy of blackpine stand). Sections were selected according to the time of the last intervention. No differences in ecological conditions between sections were observed, the differences were only significant between the strata. Coverage of ground vegetation, shrub and tree layer was different between strata and sections. Coverage of ground vegetation was highest in the middle sections. Twelve shrub species were inventoried, the most common were smoke tree, privet and blackberry. Coverage of shrubs was highest in the middle section. A total of 12 tree species were registered, the most numerous were manna ash, oak and hop hornbeam. Increasing proportion of shrub and ground vegetation was negatively correlated to density of tree species. Number and coverage of the main tree species was the highest in section with the oldest intervention. Height of dominant individuals was significantly different between sections. The relative annual height increment was highest in the middle open section. On average, the relative height increment of previous year was larger.Vertical structure of regeneration showed the largest number of oak and manna ash in the class up to 50 cm and hop hornbeam in the class up to 300 cm. Average openness in the stand was 20 %. The proportion of browsed specimens of oak and hop hornbeam was the highest under the canopy, while this was the case for manna ash in the middle open section.
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Odd. za gozdarstvo in obnovljive gozdne vire
Pages:	VII, 44 str.
ID:	11534104