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Meritve sončnega sevanja v gozdu - II. Metode na osnovi projekcij hemisfere neba in krošenj
Diaci, Jurij (Author), Thormann, Jean-Jacques (Author), Kolar, Uroš (Author)

URLURL - Presentation file, Visit http://eprints.gozdis.si/id/eprint/404 This link opens in a new window

Abstract
Poznavanje porazdelitve sevanja v gozdu je pomembno za temeljna ekolo{ka prou~evanja in za prakso gojenja gozdov. V ~lanku primerjamo tri metode ocenjevanja son~nega sevanja na osnovi preslikave svoda neba in kro{enj: fotografijo hemisfere z objektivom "ribje oko", horizontoskop in LAI-2000 Plant Canopy Analyzer. Prikazujemo izku{nje, izbolj{ave metod ter na~rt za podstavek horizontoskopa, ki smo ga razvili na Katedri za gojenje gozdov. Izbolj{ani stabilni horizontoskop daje, z nekaterimi omejitvami, povsem zadovoljive rezultate za neposredno gojitveno delo. Fotografija hemisfere je primerna za oceno svetlobnih razmer v vseh tipih sestojev in je zato uporabna pri raziskovalnem delu. V zadnjem ~asu se metoda intenzivno razvija. Digitalizacija celotnega sistema bo pospe{ila standardizacijo. Instrument LAI-2000 je posebej primeren za raziskave pomlajevanja v razmerah bujne zeliščne vegetacije na bogatih rastiščih in v spremenjenih sestojih.

Language:Slovenian
Keywords:sončno sevanje, meritve sevanja, gojenje gozda, fotosinteza, fotosintetsko aktivno sevanje, fotosintetsko uporabno sevanje, pretok energije, gozd, fotografija, hemisfera, horizontoskop, direktno sevanje, difuzno sevanje
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Year:1999
Publisher:Inštitut za gozdno in lesno gospodarstvo
Number of pages:str. 177-210
Numbering:Št. 60
UDC:630
ISSN on article:0351-3114
COBISS.SI-ID:605094 Link is opened in a new window
Views:493
Downloads:77
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Record is a part of a journal

Title:Zbornik gozdarstva in lesarstva
Shortened title:Zb. gozd. lesar.
Publisher:Gozdarski inštitut Slovenije, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:0351-3114
COBISS.SI-ID:6206978 This link opens in a new window

Secondary language

Language:English
Title:Solar radiation measurements in forests
Abstract:
The know-how in the field of solar radiation distribution in forests is important for basic ecological investigations and silvicultural practice. Three methods of solar radiation assessment based on hemispherical canopy photography are compared in the present article: a hemispherical photography by means of a fish-eye lens, a horizontoscope and the ALI-2000 Plant Canopy Analyzer. Experiences, improved methods and a drawing of a horizontoscope stand which was elaborated at the Chair of Silviculture are presented. Fairly good results with some limitations can be achieved with the improved stable horizontoscope in silvicultural work. Hemispherical photography is appropriatefor the assessment of light conditions in all stand types and can thus be used in research work. The method has recently been undergoing intensive development. Digitalization of the entire system will speed up standardization. The ALI-2000 instrument is highly suitable for regeneration research in conditions of abundant plant vegetation, in reach sites and modified stands.

Keywords:solar radiation, radiation measurement, silviculture, photosynthesis, photosynthetically active radiation, photosynthetically usable radiation

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