Tina Simončič (Author), Andrej Bončina (Author)

Abstract

V raziskavi smo presojali možnosti za dopolnitev gozdne inventure na stalnih vzorčnih ploskvah (SVP) s popisom pomladka. Na vsaki izmed 36 SVP smo na štirih ploskvicah (1,5 * 1,5 m) analizirali pomladek glede na drevesne vrste, višinske razrede in poškodovanost. Ocenili smo relativno natančnost skupne gostote pomladka, gostote pomladka jelke in javorja, poškodovanosti pomladka, gostote pomladka v drugi debelinski stopnji, če v vzorec vključimo eno ploskvico (2,25 m2), dve (4,50 m2), tri (6,75 m2) ali vse štiri ploskvice (9,00 m2). Variabilnost ocenjevanja gostote pomladka je največja v drogovnjakih; največja je v primeru, ko popišemo samo eno ploskev (2,25 m2). Relativni odklon zaupanja se na splošno manjša s povečevanjem velikosti popisne ploskve, izrazito se zmanjša, če popisno ploskev povečamo do 6,25 m2. Relativna natančnost ocen različnih znakov o pomladku je opazno različna. Velikost vzorca (število SVP) vpliva na natančnost ocen, ki se izrazito izboljšuje do 30 oziroma 40 analiziranih SVP.

Keywords

gozdnogospodarsko načrtovanje;vzorčne ploskve;gozdovi;inventura pomladka;informacije o pomlajevanju;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije
UDC: 630*52(045)=163.6
COBISS: 3089830 Link will open in a new window
ISSN: 0017-2723
Parent publication: Gozdarski vestnik
Views: 837
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Other data

Secondary language: English
Secondary title: Estimation of possibility for regeneration inventory on permanent sampling plots
Secondary abstract: A possibility of supplementation of forest inventory on permanent sampling plots (PSPs) with inventory of regeneration (dbh < 10 cm) was examined. On each of the 36 analyzed PSPs four small plots (1.5 * 1.5 m) were established for registering tree species composition, height structure and damage of regeneration. Relative accuracy of estimations for regeneration density, damage of regeneration, density of fir and sycamore regeneration, and density of regeneration in the second diameter class were evaluated, when one (2.25 m2), two (4.50 m2), three (6.75 m2) or all four plots (9.00 m2) were included in the sample. The highest variability of the regeneration estimations was in the pole stands and in the case when only one plot (2.25 m2) was included in the sample. The relative confidence interval decreased with increasing size of the analyzed plot, particularly if we increased the size of the sample plot to 6.25 m2. The relative accuracy of regeneration estimations differed significantly. The size of the sample (number of analyzed PSPs) influenced the relative accuracy of the estimations which was significantly improving up to 30-40 analyzed PSPs.
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 459-470
Volume: ǂLetn. ǂ68
Issue: ǂšt. ǂ10
Chronology: 2010
ID: 1730568