Puutuha kui toiteainerikka tootmisjäätme mõju arukase kasvule ammendatud freesturbaväljal
Laen...
Kuupäev
2023
Kättesaadavus
06.09.2023
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Pikaajalise turba kaevandamise tagajärjel on viimaste andmete järgi Eestis 9371 hektarit
mahajäetuid turbalasid, mis on oluliseks CO2 allikaks ning väga tuleohtlikud. Jääksoode
looduslik taastumine võtab aega aastakümneid. Selleks, et vähendada eralduva
süsihappegaasi kogust, tuleks jääksood taastada. Ökoloogilistest ja majanduslikest
aspektidest on jääksoode metsastamine üks perspektiivikamaid võimalusi.
Käesoleva töö eesmärgiks on hinnata erinevate puutuha koguste mõju arukase kasvule
Ulila ammendatud freesturbaväljal. Ulila katsealal mõõdeti 2022. aastal kaskede
kõrguskasvud ja juurekaela diameetrid ning võrreldi varasemalt (2009-2021) mõõdetud
puude kasvunäitajatega. Andmeid koguti kahelt katsevariandilt, millest esimest
katsevarianti oli töödeldud puutuha kogusega 5 t/ha ja teist kogusega 10 t/ha. Paremad
tulemused mõõdeti katsealalt, mida oli töödeldud suurema puutuha kogusega 10 t/ha. Nii
Soomes kui ka Eestis tehtud puutuha katsete tulemused olid sarnaseid Ulila katsealal
saadud tulemustega. Mõlemal puutuhaga töödeldud katsealal oli väga hästi näha, et
kaskede väetamine puutuhaga kiirendas oluliselt kaskede kasvu, kuna puutuha lisamisega
paraneb turba jääklasundis puude kasvuks oluliste P- ja K-sisaldus.
As a result of long-term peat extraction, according to the latest data, there are 9371 hectares of abandoned peatlands in Estonia, which are an important source of CO2 and are highly flammable. The natural recovery of cutaway peatlands takes decades. In order to reduce the amount of carbon dioxide emitted, the cutaway peatlands should be restored. From an ecological and economic point of view, the afforestation of cutaway peatlands is one of the most promising options. The aim of this work is to assess the impact of different quantities of wood ash on silver birch growth in the exhausted cutaway peatland of Ulila. At the Ulila test area, in 2022, the height growths and the root diameters of silver birches were measured and were compared with previously measured (2009-2021) tree growth indicators. Data were collected from two test variants, the first of which had been treated with a quantity of wood ash of 5 t/ha and the second with a quantity of 10 t/ha. Better results were measured from the test area, which had been treated with a higher amount of wood ash of 10t/ha. The results of the wood ash tests carried out in Finland and Estonia were similar to those obtained in the Ulila test area. In both test areas treated with wood ash, it was very clear that fertilizing birches with wood ash significantly accelerated the growth of birch trees because with the addition of wood ash the content of P and K which are important for tree growth impruves in residual peat.
As a result of long-term peat extraction, according to the latest data, there are 9371 hectares of abandoned peatlands in Estonia, which are an important source of CO2 and are highly flammable. The natural recovery of cutaway peatlands takes decades. In order to reduce the amount of carbon dioxide emitted, the cutaway peatlands should be restored. From an ecological and economic point of view, the afforestation of cutaway peatlands is one of the most promising options. The aim of this work is to assess the impact of different quantities of wood ash on silver birch growth in the exhausted cutaway peatland of Ulila. At the Ulila test area, in 2022, the height growths and the root diameters of silver birches were measured and were compared with previously measured (2009-2021) tree growth indicators. Data were collected from two test variants, the first of which had been treated with a quantity of wood ash of 5 t/ha and the second with a quantity of 10 t/ha. Better results were measured from the test area, which had been treated with a higher amount of wood ash of 10t/ha. The results of the wood ash tests carried out in Finland and Estonia were similar to those obtained in the Ulila test area. In both test areas treated with wood ash, it was very clear that fertilizing birches with wood ash significantly accelerated the growth of birch trees because with the addition of wood ash the content of P and K which are important for tree growth impruves in residual peat.
Kirjeldus
Bakalaureusetöö
Metsanduse õppekaval
Märksõnad
bakalaureusetööd, jääksoo, puutuhk, Betula pendula, kõrgus, diameeter, Roheline Ülikool (töö toetab EMÜ Rohelise Ülikooli põhimõtteid), keskkond, jätkusuutlikkus, säästev areng