Puude kahjustused metsa kasvukäigu püsiproovitükkidel
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Kuupäev
2016
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Puudel esinevad kahjustused võivad mõjutada oluliselt metsade sanitaarset seisundit, mis
võib metsaomanikule olulist kahju tekitada. Kahjustused, mis puudel tekkida võivad on
väga erinevad. Need võivad tingitud olla loomadest, putukatest, seentest, aga ka muudest
looduslikest faktoritest. Lisaks neile võib puid negatiivselt mõjutada ka inimene, kes oma
tegevusega otsesest või kaudset kahju võib tekitada. Käesoleva töö eesmärk oli uurida
Eesti metsa kasvukäigu püsiproovitükkidel esinevaid peamisi kahjustusi ning kirjeldada
neid üksikasjalikumalt kirjanduslikus osas. Töös kasutatavad püsiproovitükkide
inventeeritud andmed põhinevad 2011-2015. aastal läbi viidud mõõtmistel.
Andmeanalüüsiks kasutati MS Exceli andmetöötlusprogrammi.
Töö tulemustest selgus, et 4,4% kasvavatest puudest olid kahjustustega. Kõige rohkem
kahjustusi esines kuuskedel, kus põhiliseks kahjustuseks oli ulukikahjustus. Ulukite poolt
tekitatud kahjustused olid ühtlasi ka kõige levinumaks kahjustuseks proovitükkidel.
Seevastu kõige vähem kahjustusi tekitasid puudele putukad. Kahjustustega puudest
suurima keskmise diameetriga olid seenkahjustustega puud, ning kõige väiksema keskmise
diameetriga ulukikahjustustega puud.
Kuna varasemalt pole puude kahjustusi metsa kasvukäigu püsiproovitükkidel uuritud, oli
teema huvitav. Töös saadud tulemused sobivad kasutamiseks metsa kasvukäigu
püsiproovitükkide kohta tehtavate sarnaste uurimuste koostamisel ning puude
väljalangevuse kui protsessi uurimisel.
Damages that occurs on trees may affect forest sanitary conditions significantly, which may cause a big loss to forest owner. Damages that may occur on trees can be very different. For example they might be caused by animals, insects, fungi, but also by natural factors. In addition, significant harm in forest can cause human, whose activity may cause direct or indirect damage. The aim of this thesis was to study the most common tree damages that occured on permanent sample plots of Estonian Forest Reasearch Plots Network and to describe them circumstantially in the literature review. Used data of permanent sample plots of Estonian Forest Research Plots Network is based on measurements which were carried out in 2011- 2015. The data was analyzed using MS Excel data processing program. Study showed, that 4,4% percent of all growing trees had damages. Most damages had spruce, where the main damage agent was game. Damages caused by games were also the most common damage generators in plots. However the less damage was caused by insects. Study showed that damaged trees with fungus had the biggest average diameters and the smallest diameters were trees with damages of game. As previously no tree damages about forest sample plots were studied, the topic was interesting to study. The results that this study showed are suitable to use in similar studies about forest research network plots.
Damages that occurs on trees may affect forest sanitary conditions significantly, which may cause a big loss to forest owner. Damages that may occur on trees can be very different. For example they might be caused by animals, insects, fungi, but also by natural factors. In addition, significant harm in forest can cause human, whose activity may cause direct or indirect damage. The aim of this thesis was to study the most common tree damages that occured on permanent sample plots of Estonian Forest Reasearch Plots Network and to describe them circumstantially in the literature review. Used data of permanent sample plots of Estonian Forest Research Plots Network is based on measurements which were carried out in 2011- 2015. The data was analyzed using MS Excel data processing program. Study showed, that 4,4% percent of all growing trees had damages. Most damages had spruce, where the main damage agent was game. Damages caused by games were also the most common damage generators in plots. However the less damage was caused by insects. Study showed that damaged trees with fungus had the biggest average diameters and the smallest diameters were trees with damages of game. As previously no tree damages about forest sample plots were studied, the topic was interesting to study. The results that this study showed are suitable to use in similar studies about forest research network plots.
Kirjeldus
Märksõnad
puud (bot.), ulukikahjustused, metsakahjustused, metsa juurdekasv, bakalaureusetööd