Presoja možnosti inventure pomladka na stalnih vzorčnih ploskvah

Simončič, Tina (author), Bončina, Andrej (author)

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.

• Language: Slovenian
• Keywords: gozdnogospodarsko načrtovanje, vzorčne ploskve, gozdovi, inventura pomladka, informacije o pomlajevanju
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije
• Year: 2010
• Number of pages: Str. 459-470
• Numbering: Letn. 68, št. 10
• PID: 20.500.12556/RUL-56426
• UDC: 630*52(045)=163.6
• ISSN on article: 0017-2723
• COBISS.SI-ID: 3089830
• Publication date in RUL: 10.07.2015

Record is a part of a journal

• Title: Gozdarski vestnik. slovenska strokovna revija za gozdarstvo
• Shortened title: Gozd. vestn.
• Publisher: Zveza gozdarskih društev Slovenije
• ISSN: 0017-2723
• COBISS.SI-ID: 3736834

Secondary language

• Language: English
• Title: Estimation of possibility for regeneration inventory on permanent sampling plots

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.