Vodni potencial v vetrolomu prizadete navadne smreke (Picea abies (Karst.)) na Jelovici 2006

diplomsko delo - visokošolski strokovni študij

Jerneja Ropret (Author), Maja Jurc (Mentor), Matjaž Čater (Co-mentor)

Abstract

Slovenski gozdovi so vse bolj izpostavljeni naravnim nesrečam, ki jih lahko posredno povežemo s številnimi podnebnimi spremembami. Največkrat so to naravne ujme, kot so vetrolomi, snegolomi, žledolomi in plazovi. Konec junija 2006 je Jelovico prizadel orkanski vetrolom in pustil bolj ali manj trajne posledice na blejskem gozdno-gospodarskem območju. Po dogodku smo izvedli raziskavo ugotavljanja vodnih razmer prizadetih smrek in pomen vodnega potenciala smreke pri naselitvi podlubnikov. Vzorčenje podlubnikov je potekalo na več krajih istega objekta (izvajanje ponovitev meritev). Merjenja so bila izvedena s pomočjo tlačne (Scholandrove) komore za določanje ksilemskega potenciala drevesa, na treh različnih primerih dreves, glede na poškodbe, ki jih je povzročil veter. Meritve vodnega potenciala so bile opravljene na drevesih navadne smreke % Picea abies (Karst.) (podrtem drevju z delujočim koreninskim sistemom, podrtem drevju s prekinjeno povezavo med deblom in koreninskim sistemom ter na stoječem, vitalnem drevju brez poškodb) v treh zaporednih obdobjih (6. 9., 28. 9. in 16. 10. 2006). Razlike med skupinami dreves smo potrdili z analizo variance. Po sistematični mreži so bile postavljene tudi pasti znamke Theysohn za podlubnike. Ugotovili smo, da sta bila zmanjšanje vrednosti jutranjega vodnega potenciala in večanje vodnega stresa skladna s pričakovanji in največja v skupini dreves s poškodovanimi koreninami. Opazili smo večanje stresa in zmanjševanje vrednosti v skupini podrtih dreves z nepoškodovanimi koreninami. Z raziskavo nismo potrdili neposredne zveze med sušnim stresom iglavcev in namnožitvijo podlubnikov, najverjetneje zaradi hitre sanacije in nizkih temperatur po ujmi.

Keywords

vetrolom;navadna smreka;varstvo;Jelovica;

Data

Language:	Slovenian
Year of publishing:	2016
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[J. Ropret]
UDC:	630*16(497.4Jelovica)(043.2)=163.6
COBISS:	4507558
Views:	591
Downloads:	125
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Water potential of norway spruce (Picea abies (Karst.)), harmed in 2006 Jelovica windthrow
Secondary abstract:	During past few years Slovenian forests were increasingly exposed to seveal natural disasters (wind breakages, rain breankages, windthrows), which could be diretly lined with a number of climate changes, appearing worldwide. At the end of June 2006, Jelovica was affected by huricane windthrow, that caused severe damage on Bled%s forest management area. In the damaged area a study was performed. Pre-dawn water potential of Norway spruce was measured after the damage event in different categories of damaged trees by the Scholander pressure chamber. Three categories of Norway Spurce trees were involved: completely damaged trees, damaged trees with functional root system and also vital, undamaged trees. Water potential measurements were carried out during three consecutive dates (6.9., 28.9. in 16.10.2006). With analysis of variance, diferences between groups were confirmed. With the help of sistematic network, traps Theysohn for the bark beetles were settled. With decline of the pre-dawn water potential value, also increased degree of water stress was confirmed, which was highest in the group of trees with damaged root system. Research did not confirm direct connection between drought stress in conifers and number of bark beetles; most probable reason for such conditions was effective and expedite sanation and lower air temperatures after the storm event.
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire
Pages:	VIII, 43 f.
ID:	11476521