Muldade ja taimestiku analüüs naadi kasvukohatüübis
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Kuupäev
2015
Kättesaadavus
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Eesti metsa kasvukäigu püsiproovitükkidel, mille rajamist alustati 1995. aastal, viidi 2012.
aastal esmakordselt läbi lisaks puistu mõõtmistele ka alustaimestiku ning muldade
uuringud, 2014.a. viidi läbi samalaadsed uuringud naadi kasvukohatüübi puistutes.
Töö eesmärgiks on uurida naadi kasvukohatüübi puistu, alustaimestiku ja mullastiku
omavahelisi seoseid 35 püsiproovitüki andmete alusel ning võrrelda kasvukohatüübi
parameetreid Lõhmuse tüpoloogiaga.
Puistu takseerandmete saamiseks kasutati ringproovitükkide meetodit, alustaimestiku
inventuur viidi läbi punktproovide meetodil ning mullakirjeldused tehti mullakaevete
põhjal. Andmete analüüsiks kasutati MS Exceli keskkonnas regressioonanalüüsi, mille
jaoks loodi eelnevalt korrelatsioonitabel.
Mullanäitajate analüüside käigus selgus, et täielikult kokkulangevaid väärtusi Lõhmuse
tüpoloogiaga võrreldes ei esine, alustaimestiku konstantsuse võrdlemise käigus selgus aga,
et leidus ka täielikke kokkulangevusi. Mullastiku, taimestiku ning puistu näitajate
omavaheliste seoste uurimisel selgus, et puistu kasvuomadustele on soodustavaks madalam
mulla pH, madalam mulla orgaanilise süsiniku sisaldus, madalam mulla üldlämmastiku
ning –süsiniku sisaldus, madalam kõdukihi üldlämmastiku ning –süsiniku sisaldus ja
madalam huumushorisondi tüsedus.
Ground vegetation assessment and soil survey was started on permanent sample plots of the Estonian Network of Forest Research Plots in 2012. These measurements were done in Aegopodium forest site type in 2014. The aim of this thesis is to study relationships between stand, soil and ground vegetation characteristics on 35 permanent sample plots and to compare acquired data with the classical values in Erich Lõhmus dissertation about the same forest site type. We used circular sample plot method to assess forest stand characteristics, pin-point method to assess ground vegetation and took topsoil samples to get soil characteristics. We used MS Excel regression analysis to analyse the data with correlation and regression analysis. Soil analysis showed that there were rather different values compared with the values from Erich Lõhmus, but there were many matching values with Lõhmus values in comparing the ground vegetation constancy. During the study of soil, ground vegetation and forest stand data it occurred that lower soil pH, lower content of organic carbon in soil, lower content of carbon and nitrogen in soil, lower content of carbon and nitrogen in litter layer and lower thickness of topsoil had positive effect on forest stand growth.
Ground vegetation assessment and soil survey was started on permanent sample plots of the Estonian Network of Forest Research Plots in 2012. These measurements were done in Aegopodium forest site type in 2014. The aim of this thesis is to study relationships between stand, soil and ground vegetation characteristics on 35 permanent sample plots and to compare acquired data with the classical values in Erich Lõhmus dissertation about the same forest site type. We used circular sample plot method to assess forest stand characteristics, pin-point method to assess ground vegetation and took topsoil samples to get soil characteristics. We used MS Excel regression analysis to analyse the data with correlation and regression analysis. Soil analysis showed that there were rather different values compared with the values from Erich Lõhmus, but there were many matching values with Lõhmus values in comparing the ground vegetation constancy. During the study of soil, ground vegetation and forest stand data it occurred that lower soil pH, lower content of organic carbon in soil, lower content of carbon and nitrogen in soil, lower content of carbon and nitrogen in litter layer and lower thickness of topsoil had positive effect on forest stand growth.
Kirjeldus
Märksõnad
mullad, taimestik, puistud, alustaimestu, naat, kasvukohatüübid, analüüs, bakalaureusetööd