Konkurentsi mõju puude radiaalkasvule ühevanuses männikus
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Kuupäev
2024
Kättesaadavus
04.09.2024
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Bakalaureusetöös uuriti Järvselja Õppe- ja Katsemetskonna kvartalil JS223 männi radiaalkasvu sõltuvust konkurentsist naaberpuudega, kasutades Hegyi konkurentsiindeksit ja puistus puu seisundit puistus kirjeldavat Krafti klassi.
Välitöödel mõõdeti 45 mudelpuud ja nende konkurentpuud, ning mudelpuudele määrati Krafti klass. Laboritöödel mõõdeti puursüdamikud, andmetöötlusel arvutati Hegyi indeks ja võrreldi puude radiaalkasvu Hegyi indeksi ja Krafti klassiga.
Puude radiaalkasv sõltus otseselt puu seisundist puistus (Krafti klassist), valitsevad ning kaasvalitsevad puud käitusid radiaalkasvu osas sarnaselt. Valitsevaid, kaasvalitsevaid ja allajäänud puid sai radiaalkasvu järgi usaldusväärselt eristada. Kaasvalitsevate puude radiaalkasv moodustas 80% ja allajäänud puude radiaalkasv 47% valitsevate puude radiaalkasvust. Valitsevate ning kaasvalitsevate puude puhul ei tulnud Hegyi indeksi osas olulist erinevust välja, kuid allajäänud puudel oli Hegyi indeks märgatavalt suurem kui valitsevatel ja kaasvalitsevatel puudel.
The response of radial growth of Scots pine on inter-tree competition is studied in this BSc thesis using the Hegyi competition index and the Kraft class, representing the hierarchy position of a tree in the stand. The total of 45 model trees and their competitors were measured and the Kraft class was determined for each model tree. In the laboratory, increment cores of model trees were measured, and the Hegyi index was calculated, the radial growth of model trees was analyzed along with Hegyi index and Kraft class. The radial growth of trees was directly dependent from the hierarchy position of a tree (Kraft class), the dominant and co-dominant trees had similar patterns of radial growth. The trees in dominant, co-dominant and dominated classes can be confidently distinguished by the radial growth. The radial growth of co-dominant trees was 80% and the radial growth of dominated trees was 47% compared to the radial growth of dominant trees. The dominant and co-dominant trees had no significant differences in Hegyi index, the dominated trees had significantly higher values of Hegyi index than the dominant and co-dominant trees.
The response of radial growth of Scots pine on inter-tree competition is studied in this BSc thesis using the Hegyi competition index and the Kraft class, representing the hierarchy position of a tree in the stand. The total of 45 model trees and their competitors were measured and the Kraft class was determined for each model tree. In the laboratory, increment cores of model trees were measured, and the Hegyi index was calculated, the radial growth of model trees was analyzed along with Hegyi index and Kraft class. The radial growth of trees was directly dependent from the hierarchy position of a tree (Kraft class), the dominant and co-dominant trees had similar patterns of radial growth. The trees in dominant, co-dominant and dominated classes can be confidently distinguished by the radial growth. The radial growth of co-dominant trees was 80% and the radial growth of dominated trees was 47% compared to the radial growth of dominant trees. The dominant and co-dominant trees had no significant differences in Hegyi index, the dominated trees had significantly higher values of Hegyi index than the dominant and co-dominant trees.
Kirjeldus
Bakalaureusetöö
Metsanduse õppekaval
Märksõnad
bakalaureusetööd, puudevaheline konkurents, harilik mänd, Hegy indeks, Krafti klass, Roheline Ülikool (töö toetab EMÜ Rohelise Ülikooli põhimõtteid), loodusvarad, veevarud, loodusvarade kaitse, jätkusuutlikkus, säästev areng