Hariliku kuuse radiaalse juurdekasvu võrdlus jänesekapsa ja sinilille kasvukohatüübis
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Kuupäev
2014
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Käesolevas bakalaureusetöö eesmärgiks on analüüsida jänesekapsa ja sinilille
kasvukohatüübis kasvavate kuusepuude radiaalset juurdekasvu ja kliimanäitajate
(temperatuur ja sademed) vahelist seost hariliku kuuse (Picea abies L.) puistutes.
Analüüsipulgad koguti 2008. aastal SA Keskkonnainvesteeringute Keskuse metsanduse
programmi projekt nr. 7 „Dendrokronoloogilise skaala koostamine kuuse puude
andmeil” välitööde käigus. Mõõdetud aastarõnga seeriad ristdateeriti ja standardiseeriti.
Vaadeldav periood oli 1946-2008. Kliimaandmed saadi Eesti Meteoroloogia ja Hüdroloogia
Instituudist. Kliimaandmete ja juurdekasvu indeksite põhjal tehti korrelatsioonanalüüs.
Samuti tehti näitaasta analüüs ekstreemsete kasvuaastate selgitamiseks.
Töö tulemusena selgus t-testiga, et kahe kasvukohatüübi keskmised radiaalsed
juurdekasvud ei erine statistiliselt oluliselt. Korrelatsioonanalüüsi tulemusena selgus, et
sinilille ja jänesekapsa kasvukohatüübis ei esine statistiliselt olulisi kliimanäitajaid, mis
mõjutavad radiaalset juurdekasvu. Maakondade kaupa tehtud kliimaanalüüsil selgus, et
peamiselt mõjutas hariliku kuuse radiaalset juurdekasvu juunikuu sademed. Näitaasta
analüüsi tulemusel selgus, et mõlemas kasvukohatüübis on positiivsed juurdekasvu aastad
1942 ja 2004 ja negatiivsed kasvuaastad 1941, 1992, 2006.
The aim of the present Bachelor thesis was to analyze the relationship between the spruce radial increment and climate (temperature and precipitation) in wood sorrel site type and hepatica site type in Norway spruce stands. The samples were collected in 2008, during the forestry program’s project number 7 of Environment Investment Centre’s „Dendrochronological scale for Norway spruce”. The tree ring series were cross dated and standardized. The observed period was from 1946 to 2008 in this study. Climatic data are obtained from the Estonian Meteorological and Hydrological Institute. Correlation analysis was based on climatic data and increment indexes. Pointer year analysis was conducted to find out extreme growth years. The results of t-test showed that comparing two site types the average radial increment do not differ statistically significantly. As a result of the correlation analysis it was found out that there are no statistically important climate parameters that affect the radial increment of the site types of wood sorrel and hepatica. The results of the climatic analysis based on counties was found that the main indicator that influenced the spruces radial increment was the June precipitation. As a result of the pointer year analysis it was discovered that in both site types positive increment years were 1942 and 2004 and negative growth years were 1941, 1992 and 2006.
The aim of the present Bachelor thesis was to analyze the relationship between the spruce radial increment and climate (temperature and precipitation) in wood sorrel site type and hepatica site type in Norway spruce stands. The samples were collected in 2008, during the forestry program’s project number 7 of Environment Investment Centre’s „Dendrochronological scale for Norway spruce”. The tree ring series were cross dated and standardized. The observed period was from 1946 to 2008 in this study. Climatic data are obtained from the Estonian Meteorological and Hydrological Institute. Correlation analysis was based on climatic data and increment indexes. Pointer year analysis was conducted to find out extreme growth years. The results of t-test showed that comparing two site types the average radial increment do not differ statistically significantly. As a result of the correlation analysis it was found out that there are no statistically important climate parameters that affect the radial increment of the site types of wood sorrel and hepatica. The results of the climatic analysis based on counties was found that the main indicator that influenced the spruces radial increment was the June precipitation. As a result of the pointer year analysis it was discovered that in both site types positive increment years were 1942 and 2004 and negative growth years were 1941, 1992 and 2006.
Kirjeldus
Märksõnad
bakalaureusetööd