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Presoja možnosti inventure pomladka na stalnih vzorčnih ploskvah = Estimation of possibility for regeneration inventory on permanent sampling plots
Simončič, Tina ; Bončina, Andrej
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.
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