Puude jaotumine rinnetesse erivanuselises kuusikus | Distribution of trees in the layers in multiaged spruce stand
2022
Tarkonen, Andreas
BakalaureusetööMetsanduse õppekaval
Show more [+] Less [-]Puud jagatakse rinnetesse puude mõõtmete järgi, peamiselt puistuelementide kõrguse järgi.Kuid rinnetes võivad olla puude vanused erinevad, kuna puude kasvukiirused jakasvutingimused on erinevad. Eriti tuleb see probleem välja erivanuselises puhtkuusikusnagu antud töös kirjeldatud.Käesoleva bakalaureusetöö eesmärgiks on uurida erivanuselises puhtkuusikus puudejaotamist rinnetesse ja puistuelementidesse. Töös kasutati töö autori poolt kogutud 40 kuusemudelpuude mõõtmisandmeid, mudelpuud on üksikpuuderindest, 1. rindest, 2. rindest jajärelkasvurindest. Puude andmed koguti Järvseljalt Õppe- ja Katsemetskonnast kvartaliltJS239 eraldiselt 9.Analüüsiti kõigi mudelpuude diameetreid, kõrguseid ja vanuseid. Analüüsi tulemustestselgus, et puude kõrgused erinevates rinnetes ei ole väga erinevad. Diameetrite erinevus onusaldatav, kuna igas rindes olevate puude diameetrid ei kattu teiste rinnete puudediameetritega. Mudelpuud määrati kolme vanusrühma selliselt, et igas rühmas oleks ühepaljupuid ja vanused oleksid küllaltki sarnased ja neile tehti H-D kõrguskõver ja selgus, etvanusrühmade kõrguskõverad ei ole usaldatavalt erinevad. Kirjeldati ka rinnete tagavara. Kuipuud määrata ühte rindesse või erinevatesse rinnetesse ja võtta nende tagavara, siis erinevuson 6%. Erinevus on väike ja puude määramine rinnetesse ei ole oluline tagavara põhjal.
Show more [+] Less [-]English. Trees are divided into layers by dimensions of trees, mainly by the height of cohorts.However, the age of the trees may be different in the layers as the growth rate and growthconditions of the trees are different. In particular, this problem comes out in a pure sprucestand, as described in this work.The aim of this Bachelor's thesis is to study the divison of trees into the layers and cohorts ina pure spruce stand. 40 spruce sample trees measured data collected by the author of the workwere used in this bachelor's thesis, the sample trees are from the emergent, the canopy, theunderstory and the regeneration layer. Tree data was collected from Järvselja Study andExperimental forests the compartment JS239 subcompartment 9.All the diameters, heights and ages of sample trees were analyzed. The results of the analysisrevealed that the heights of trees in different layers are not very different. Diameter differenceis reliable because the diameters of the trees in each layers do not overlap with the diametersof other layers trees. Sample trees were assigned to three age groups in such a way that eachgroup has the same number of trees and age are quite similar. The trees in the age groupswere made a H-D height curve and it was found that the height curves of age groups are notreliably different. The stand volume of the layers was also described. If the trees are assignedto one layer or different layers and take their stand volume, the difference is 6%. Thedifference is small and the designation of the trees to the layers is not important based on thestand volume.
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