Järvselja metsakvartalite takseerimine erineva majandusrežiimiga metsades
Laen...
Kuupäev
2019
Kättesaadav alates
11.09.2019
Autorid
Jänes, Artur
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Metsatakseerimise eesmärk on aktualiseerida andmeid puistu arengu kohta. Takseerimise andmeid
saab kasutada metsa koosseisu ja väärtuse hindamiseks, metsamajandamiskava koostamiseks või
metsade omavaheliseks võrdluseks. Antud bakalaureusetöö eesmärgiks on takseerida ja võrrelda
püsivalt-, piiratud- ja looduskaitsealal majandatavaid puistuid, kinnitamaks nende erinevust.
Takseeritud alad asuvad SA Järvselja Õppe- ja Katsemetskonnas, mis asub Tartu maakonnas Kastre
vallas, metsakvartalites Rõkal (5), Liispõllul (6) ja Järvselja looduskaitsealal (5). Lisaks võrreldi
andmeid ka Eesti metsade keskmiste näitajatega. Takseerandmed koguti ülepinnalisel
takseerimisel, andmetöötlus teostati MS Office ja Rstudio tarkvaraga.
Tulemustest selgus, et püsivalt majandatud Liispõllu piirkond oli teistest erinev. Liispõllu erines
Rõka ja LKA piirkondadest keskmise hektaritagavara osas, mis oli ~80 tm/ha kohta väiksem ja
arenguklasside pindalalises jaotuses, kus küpsete metsade osakaal oli madalam. Rõkas oli küpsete
metsade arenguklassis 54,9% pindalast, LKA alal 72,9% ja Liispõllus 34,7%. See-eest olid teised
arenguklassid Liispõllul ühtlasemalt jaotunud. Boniteediklasside, enamuspuuliikide ja
kasvukohatüüpide jaotus ei olnud aladel märkimisväärselt erinev.
Kokkuvõtteks saab öelda, et Rõka ja LKA uurimisalade vahelised sarnasused olid suuremad, kui
Liispõllul ning selle peamiseks põhjuseks on metsamajandustegevuse intensiivsuse erinevus nendel
aladel viimase 20 aasta jooksul.
The purpose of forest assessment is to actualize data about stand development. The data can be used to assess the value of the forest, forest management planning and to compare different forest areas. The purpose of this Bachelor's thesis is to assess and compare permanent, limited-, and protection area forest management. Study areas are part of Järvselja Training and Experimental Forest Distririct in Rõka (5), Liispõllu (6) and Järvselja Nature Protection Area (NPA) (5), located in Kastre parish, Tartu county, Estonia. The Additionaly the data is compared with the average data from Estonian forests. The data was collected by overall assessment and processing of data was made by MS Office and Rstudio software. The results show that Liispõllu permanently managed area is statisticcally different from ohter study sites. Liispõllu differed from Rõka and NPA in terms of avarage stock, which was ~80 m3 /ha smaller and by the area of development stages, where the proportion of mature forests was lowest in Liispõllu stands. Mature forest stands porpotion in Rõka was 54,9%, NPA 72,9% and Liispõllu 34,7%. On the ohter hand all the rest forest development stages were evenly distributed in Liispõllu stands. There were no significant differences between site index, dominat tree species and and forest site types in study areas. In conclusion we can say that similarities between Rõka and NPA were higer than in Liispõllu and the main reason for it are differemt forest managment regimes for these areas for the last 20 years.
The purpose of forest assessment is to actualize data about stand development. The data can be used to assess the value of the forest, forest management planning and to compare different forest areas. The purpose of this Bachelor's thesis is to assess and compare permanent, limited-, and protection area forest management. Study areas are part of Järvselja Training and Experimental Forest Distririct in Rõka (5), Liispõllu (6) and Järvselja Nature Protection Area (NPA) (5), located in Kastre parish, Tartu county, Estonia. The Additionaly the data is compared with the average data from Estonian forests. The data was collected by overall assessment and processing of data was made by MS Office and Rstudio software. The results show that Liispõllu permanently managed area is statisticcally different from ohter study sites. Liispõllu differed from Rõka and NPA in terms of avarage stock, which was ~80 m3 /ha smaller and by the area of development stages, where the proportion of mature forests was lowest in Liispõllu stands. Mature forest stands porpotion in Rõka was 54,9%, NPA 72,9% and Liispõllu 34,7%. On the ohter hand all the rest forest development stages were evenly distributed in Liispõllu stands. There were no significant differences between site index, dominat tree species and and forest site types in study areas. In conclusion we can say that similarities between Rõka and NPA were higer than in Liispõllu and the main reason for it are differemt forest managment regimes for these areas for the last 20 years.
Kirjeldus
Bakalaureusetöö
Metsanduse õppekaval
Märksõnad
bakalaureusetööd, metsakorraldus, hindamine, puistud, kasvukohatüübid